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Harris MW-SB, Техническое руководство

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Содержание MW-SB

Страница 1: ...www SteamPoweredRadio Com T M No 888 2109 014 Copyright Harris Corporation 1985 All rights reserved 994 8622 001 TECHNICAL MANUAL MW SB AM BROADCAST TRANSMITTER 888 2109 014 Printed January 23 1985 ...

Страница 2: ...ged Locate and retain all PACKING CHECK LISTs Use the PACKING CHECK LIST to help locate and identify any components or assemblies which are removed for shipping and must be reinstalled Also remove any shipping supports straps and packing materials prior to initial turn on Technical Assistance HARRIS Technical and Troubleshooting assistance is available from HARRIS Field Service during normal busin...

Страница 3: ...PIN column gives the ten digit Harris part number usually in ascending order DESCRIPTION column gives a 25 character or less description of the part number REF SYMBOLS EXPLANATIONS column 1 gives the reference designators for the item i e COO R102 etc that corresponds to the number found in the schematics COOi in a bill of material is equivalent to Cl on the schematic or 2 gives added information ...

Страница 4: ...r correctness or locating o substitude if the port is not ovoiloble EQUIPMENT NAME The equipment name port number and sertol number will be found on the metal 10 plate on the bock of the unit The serial number MUST be Included fof any ports ordered under EQUIPMENT PART NUMBER warranty Describe the port ustng the descrtpUon in the ports list if possible Include the schemoUc information schematic nu...

Страница 5: ...13 5 15 5 16 5 28 5 29 5 30 5 31 5 32 Added the following page Manual Revision History page 012 07 31 84 29106 Replaced the following pages Title Page Manual Revision History Page 7 32 013 10 18 84 29122 Replaced the following pages Title Page Manual Revision History Page 7 10 8 11 8 12 014 01 23 85 27944 Replaced the following pages Title Page Manual Revision History Page 7 29 888 2109 014 ...

Страница 6: ...rved The following National Fire Protection Association NFPA standards are recommended as references Automatic Fire Detectors No 72E Installation Maintenance and Use of Portable Fire Extinguishers No 10 Halogenated Fire Extinguishing Agent Systems No 12A WARNING ALWAYS DISCONNECT POWER BEFORE OPENING COVERS DOORS ENCLOSURES GATES PANELS OR SHIELDS ALWAYS USE GROUND ING STICKS AND SHORT OUT HIGH VO...

Страница 7: ...L BREATHS REMEMBER MOUTH TO MOUTH RESUSCITATION MUST BE COMMENCED AS SOON AS POSSIBLE CIRCULATION DEPRESS STERNUM 1 1 2 TO 2 INCHES IF PULSE ABSENT BEGIN ARTIFICIAL CIRCULATION APPROX RATE ONE RESCUER OF COMPRESSIONS 15 COMPRESSIONS 80 PER t 4 INUTE 2 QUICK BREATHS APPROX RATE TWO RESCUERS U l 1 J OF COMPRESSIONS 5 COMPRESSIONS 60 PER MINUTE 1 BREATH NOTE DO NOT INTERRUPT RHYTHM OF COMPRESSIONS WH...

Страница 8: ...s possible e If arms or legs are affected keep them elevated NOTE If medical help will not be available within an hour and the victim is conscious and not vomiting give him a weak solution of salt and soda 1 level teaspoonful of salt and 1 2 level teaspoonful of baking soda to each quart of water neither hot or cold Allow victim to sip slowly about 4 ounces a half of glass over a period of 15 minu...

Страница 9: ...ons Primary Power RF Output Audio Input Normally 600 0hm Balanced Modulation Monitor Frequency Monitor Transmitter Grounding Stud External Interlock Remote Control Connections Initial Pre Turn On Mechanical Initial Pre Turn On Electrical Checks Checks Primary Power Application Remote Me ter Calibration Remote Plate Current Sample Adjustment Remote PA Plate Voltage Meter Sample Calibration Remote E...

Страница 10: ...bsystem Oscillator Module 1A2Al 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Cl O IPA and RF Drivers 1A2A3 Power Amplifier Grid Circuit Audio Subsystem Modulation Enhancer PDM and Audio Driver Principles of Pulse 1A1 Duration Modulation PDM Board lAlAl Audio Driver Board 1A1A3 Modulator Tube Circuit Modulator Tube 75 kHz Filter Damper Diode Assembly Audio Input Dissipation Overload and Feedback 1A1A2 B...

Страница 11: ...t Network Oscillator IPA and RF Driver Alignment Oscillator Alignment _ IPA Tuning RF Driver Check Carrier Frequency Check Efficiency Tuning Overload Checks and Adjustments Air Pressure Switch Sensitivity Electrical Zero of Plate Voltage Meter Audio Input PDM Control Feedback Board Audio Board Alignment Audio Board Adjustment Bessel Filter Adjustment Low Frequency 3 dB Point Adjustment Distortion ...

Страница 12: ...ty Poor Performance Overload Shutdowns Modulation Enhancer Malfunction RF Oscillator Module 1A2Al Malfunction PDM Module lAlAl Malfunction RF Driver 1A2A3 Malfunction SECTION VII PARTS LIST 6 7 6 7 6 7 6 9 6 10 6 10 6 10 6 10 Introduction 7 1 Replaceable Parts Service 7 1 SECTION VIII DIAGRAMS Introduction 8 1 APPENDIX A DATA Introduction A 2 888 2109 010 vii WARNING Disconnect primary power prior...

Страница 13: ...ontrols and Indicators RF Driver and Overload 1A2 Controls and Indicators PA Tune Capacitor 1Cl4 Values Modulation Enhancer 1A1A4 Troubleshooting RF Oscillator Module 1A2Al Troubleshooting PDM Module lAlAl Troubleshooting RF Driver 1A2A3 Troubleshooting Replaceable Parts List Index Xmtr MWSB SkW Mlv5B Basic Xmtr PDM Chassis lAl PDS PC Board PC Bd Xfmrless and Input Audio Driver PC Assy t1El RF and...

Страница 14: ...m External Meter and Control Panels 1A7 and 1A9 Controls and Indicators Meter Panel 1A7 Controls Meter Panel 1A9 and Directional Coupler 1A8 Controls Carrier Tuning Controls and HV Protection Controls and Indicators AC Power Panel 1A4 Controls and Indicators Isolated Plate 1A3 Modulation Enhancer 1AlA4 and Fine Power Adjust Controls and Indicators PDM Chassis lAl and RF Driver and Overload 1A2 Con...

Страница 15: ...ction Circuity 8 17 Wire Running List Sheet 1 of 9 8 19 Wire Running List Sheet 2 of 9 8 21 Wire Running List Sheet 3 of 9 8 23 Wire Running List Sheet 4 of 9 8 25 Wire Running List Sheet 5 of 9 8 27 Wire Running List Sheet 6 of 9 8 29 Wire Running List Sheet 7 of 9 8 31 Wire Running List Sheet 8 of 9 8 33 Wire Running List Sheet 9 of 9 8 35 Wire Running List PDM and Audio Sheet 1 of 2 8 37 Wire R...

Страница 16: ...N provides descriptions of functional circuits within the transmitter beginning with a general overall block diagram discussion and proceeding through detailed printed circuit board discussion e SECTION V MAINTENANCE provides information pertaining to pre ventive and corrective maintenance along with applicable perfor mance schedules f SECTION VI TROUBLESHOOTING provides fault location guidance an...

Страница 17: ...www SteamPoweredRadio Com Figure 1 1 MW SB AM BROADCAST TRANSMITTER 1 2 888 2109 010 WARNING Disconnect primary power prior to servicing ...

Страница 18: ...icator LED 1 9 Filtered cooling air for the transmitter is provided filter located at the bottom rear of the equipment cabinet may be removed for cleaning during transmitter operation 1 10 FUNCTIONAL DESCRIPTION by a blower and The air filter 1 11 The basic functional circuits in the HARRIS MW SB AM BROADCAST TRANS MITTER consists of an Audio Section RF Section Control Section and a Power Supply S...

Страница 19: ...www SteamPoweredRadio Com Figure 1 2 MW SB AM BROADCAST TRANSMITTER Front View 1 4 888 2109 010 WARNING Disconnect primary power prior to servicing ...

Страница 20: ...www SteamPoweredRadio Com L j d I 4 I l Figure 1 3 MW SB AM BROADCAST TRANSMITTER Rear View 888 2109 010 1 5 WARNING Disconnect primary power prior to servicing ...

Страница 21: ...MODULATION TRACKING f I NTERMEO I ATE POWER 1 AMPLI Fl ER CONTROL SECTION POM AMPLIFIER t FOUR RF DRIVER MODULES AUDIO DRIVER ISO A D 7 ENCLOSURE I I I I POWER I f H f AMPLIFIER I I 3CX2500F3 I I I L ____ _ J 70 kHz I I I FILTER DAMPER DIODE MODULATOR IsCXJOOO r Figure 1 4 MW SB AM BROADCAST TRANSMITTER Simplified Block Diagram OUTPUT lET IORK HIGH VOLTAGE POWER SUPPLY H V TRANSFORM ER PROTECTION ...

Страница 22: ...ides 225 degrees of phase shift between the PA Tube and the load 1 19 The power supplies in the HARRIS MW 5B AM BROADCAST TRANSMITTER are protected by circuit breakers which can be reset from the AC Power Panel The high voltage transformer is also protected against gross phase imbalance by the High Voltage Protection circuitry Other overload circuits are provided for transmitter fault protection 1...

Страница 23: ...13 0 kVA at 5000 watts carrier and 100 modulation 10 dBm _2 dB 600 150 ohms balanced l dB from 20 to 10 000 Hz at 95 modulation Less than 2 at 20 to 10 000 Hz 95 modulation Rated 5000 watts Capable watts Power reduction to watts 5600 1000 Meets or exceeds FCC and CCIR re quirements 535 kHz to 1605 kHz 50 300 ohms as specified 80 dB Meets or exceeds FCC or CCIR specifications Less than 2 at 100 mod...

Страница 24: ...ISE Air DISSIPATION CABINET THERMAL RADIATION CHARACTERISTIC 78 inches 198 12 cm 72 inches 182 88 cm 32 inches 81 28 cm 1250 pounds 566 99 kg approximate 1600 pounds 727 75 kg approximate 1850 pounds 839 15 kg approximate 120 cubic feet 3 398 meters packed 20 to 5o0 c 4 to 122 F i to 95 0 to 7500 feet 2286 meters 1000 CFM 9 c 5 1 KW 17 496 BTUH 250W estimated cubic 888 2109 010 1 9 1 10 WARNING Di...

Страница 25: ...www SteamPoweredRadio Com ...

Страница 26: ...sed in unloading the container to prevent injury to personnel or damage to the transmitter Equipment capable of handling a 2000 pound 910 kg load is to be used Upon delivery the shipping con tainers should be examined for indications of possible mishandling If damage has occurred retain shipping containers and immediately notify the carrier and HARRIS CORPORATION Broadcast Transmission Division Re...

Страница 27: ...e drawings 2 12 TRANSMITTER INSTALLATION 2 13 No special instructions are necessary for installing the transmitter as fastening to the floor is not required Position the transmitter in the desired location with regard to accessibility of interconnecting wiring and interfacing equipment Refer to figure 2 1 for dimensions and interface information 2 14 INSTALLATION OF REMOVED COMPONENTS WARNING I DO...

Страница 28: ...RONT ELEVATION CONTROL WIRE ENTRY I II Ii 11 1 6 4 RF OUTPUT a A R EXHAUST 100 CfM SIDE ELEVH ON 3 ss a I rt AC ENTRY 29 4 I SECTION VIEW A A SASE WI RE OPENINGS FIGURE 2 1 TRANSMITTER OUTLINE DRAWING 839 5451 001 888 2109 010 2 3 2 4 WARNING Disconnect primary power prior to servicing ...

Страница 29: ...www SteamPoweredRadio Com ...

Страница 30: ...TOR 1Cl4 2 18 Variable capacitor 1Cl4 may have been removed for shipment The fol lowing adjustment of the capacitor counter will be necessary a Reinstall the capacitor into the bracket fastener Tighten the shaft into the counter the counter shaft retaining screws loose b Set the counter to zero and secure the mechanism leaving c Adjust the knob counterclockwise until the knob just starts to turn f...

Страница 31: ...www SteamPoweredRadio Com CAPACITOR lCl BLOWER MOTOR V BELT BLOWER lBl Figure 2 2 Transmitter Component Locations Sheet 1 of 6 2 6 888 2109 010 WARNING Disconnect primary power prior to servicing ...

Страница 32: ...www SteamPoweredRadio Com 1Cl5 Figure 2 2 Transmitter Component Locations Sheet 2 of 6 888 2109 010 WARNING Disconnect primary power prior to servicing 4CX3000A TUBE lVl 113 2 7 ...

Страница 33: ...www SteamPoweredRadio Com 3CX2S00F3 TUBE 1V2 APACIT0R 1C3 Figure 2 2 Transmitter Component Locations Sheet 3 of 6 2 8 888 2109 010 WARNING Disconnect primary power prior to servicing ...

Страница 34: ...ww SteamPoweredRadio Com INDUCTOR 118 TRANSFORMER 1T4 AIR PRESSURE SWITCH lSl Figure 2 2 Transmitter Component Locations Sheet 4 of 6 888 2109 010 WARNING Disconnect primary power prior to servicing 2 9 ...

Страница 35: ...www SteamPoweredRadio Com CRYSTAL 1 CRYSTAL 2 Figure 2 2 Transmitter Component Locations Sheet 5 of 6 2 10 888 2109 010 WARNING Disconnect primary power prior to servicing ...

Страница 36: ...www SteamPoweredRadio Com CAPACITOR 1Cl4 CAPACITOR 1Cl8 FEED THRU Figure 2 2 Transmitter Component Locations Sheet 6 of 6 888 2109 010 2 11 WARNING Disconnect primary power prior to servicing ...

Страница 37: ...l interlock and 8 remote control connections Refer to figure 2 3 for the external connections wir ing diagram 2 24 PRIMARY POWER Customer specified 3 phase 208 230 volt 60 Hz or 3 phase 380 volt 50 Hz primary power is required Connections are made to terminals 1 2 and 3 on terminal board TBl figure 2 3 if 208 230 volt c 3 phase primary power is used If 380 volt 50 Hz 3 phase power is used terminal...

Страница 38: ...I PWR HY OH HY OFF F WR RAISE LOWER JILT CURRENT FAULT RESET FAULT 1100 FAULT DIS FAULT DC FAULT VSWR CARRIER OFf PH EDS FAULT ARC PLT VOLTS AUDIO IN FREIi IION t a 0 _ t _0 ro O _ c _ J 828 7160 001 Figure 2 3 Transmitter Interconnection Diagram 888 2109 010 WARNING Disconnect primary power prior to servicing 2 13 ...

Страница 39: ...r connect the two audio wires to terminals 20 and 21 on terminal board 1TB2 located in the cabinet on the right side viewed from the rear of transmitter near blower lBl figure 2 5 Connect the shield ground to terminal 22 2 28 MODULATION MONITOR A modulated sample voltage at BNC connector Jl on chassis lAll figure 2 5 is provided for Modulation Monitor operation A BNC plug wit h RG58 coaxial cable ...

Страница 40: ...T 240 0 210 L O J0 o 0 10 I 240 I 0210 O to 0 0 10 _ 240 0210 o 10 0 0 10 I LJ 0 240 2 210 10 V INPUT 0 10 0 L 0 10 0 240 210 0 10 0 0 10 __ 0 240 210 0 10 0 0 JO 240 0 210 230 V INPUT 10 OD 0 10 240 0 210 10 Oo O 816 8223 001 Figure 2 4 HV Transformer Connections Wiring Diagram Sheet 1 of 2 888 2109 010 WARNING Disconnect primary power prior to servicing 2 15 ...

Страница 41: ... 0 210 0 210 0 10 0 0 10 I NEUTRAL 0 240 210 3B0V INPUT 0 10 L 00 10 NEuTR AL 240 0 210 415V INPUT 10 00 0 10 0 240 240 210 0 210 0 10 I 10 00 oo l 10 0 10 0 240 _ 240 _ 210 0 10 0 210 10 __ 0 0 10 _ 0 0 O 10 _ 816 8223 001 Figure 2 4 HV Transformer Connections Wiring Diagram Sheet 2 of 2 2 16 888 2109 010 WARNING Disconnect primary power prior to servicing ...

Страница 42: ...ON f MODULATION MONITOR CONNECTIONS PRIMARY POWER CONNECTIONS i AUDIO INPUT AND REMOTE CONNECTIONS 1TB2 Figure 2 5 Transmitter Connection Locations 888 2109 010 WARNING Disconnect primary power prior to servicing FREQUENCY MONITOR CONNECTION 2 17 ...

Страница 43: ...nd 4 b Low Power Operation Provision is made for a momentary closure rated 115 Vac 2 amperes to switch the transmitter to low pow er Connections are made to terminals 3 ground and 5 The carrier is not turned off during this switching operation c High Power Operation Provision is made for a momentary closure rated 115 Vac 2 amperes to switch the transmitter to high power Connections are made to ter...

Страница 44: ...terminals 3 ground and the associated fault readout as follows 1 Modulator Terminal 13 2 Dissipation Terminal 14 3 DC Overload Terminal 15 4 VSWR Trip Terminal 16 5 Arc Terminal 18 k Fault Indicator Reset Provision is made for a momentary closure rated 30 Vdc 1 ampere to reset the fault indicators located on the front panel of the transmitter and also those at the remote readout Connections are ma...

Страница 45: ...NT BEFORE TOUCHING THEM a Check that all connections on terminal boards in the transmitter are tight b Check the transmitter to ensure that there is no loose hardware in the unit Check inside inductors for loose metallic hardware c Rotate blower manually to be sure impeller is free turning with no obstructions present Check blower belt tension in accordance with figure 2 6 BLOWER BELT ADJUSTMENT T...

Страница 46: ...LOAD variable inductor 1L12 figure 3 4 to counter number shown on Fac tory Test Data Sheet 3 Adjust FILAMENT VOLTAGE rheostat 1A4R4 figure 3 5 to midrange 4 Open PDM chassis front hinged panel figure 3 8 and adjust the following potentiometers on PDM control printed circuit board 1AlA2 a LO PWR potentiometer R 53 maximum counterclockwise b HI PWR potentiometer R 52 maximum counterclockwise c Check...

Страница 47: ... interlocks are closed 1 Left Rear Door 2 Right Rear Door 3 AC Control Door 4 Audio Driver Access Door 5 RF Driver Access Door 2 37 PRIMARY POWER APPLICATION 2 38 Complete the following steps foe primary power application 2 22 a Apply 3 phase primary power to the transmitter b Set LOCAL REMOTE switch to LOCAL PRIOR TO PERFORMING THE FOLLOWING STEP ENSURE THAT ALL DOORS ARE TIGHTLY CLOS ED IF AIR P...

Страница 48: ...is less than 9 amp eres move each slug out of its coil 1 8 inch Tighten screws and close RF Driver interlocked panel If RF Driver current is still incorrect repeat steps 1 and 2 e Open the RF Driver Chassis front panel and adjust IPA OUTPUT ADJUST potentiometer 1A2A3R4 figure 3 7 on the bottom of the chassis counterclockwise Monitor the PA grid current and back the IPA control clockwise until the ...

Страница 49: ...s the HIGH POWER pushbutton switch on the left meter panel Check that switch indicator illuminates m Operate the MULTIMETER switch and verify multimeter indications in accordance with the HV ON ZERO POWER column in figure 2 7 n Open PDM chassis front panel Adjust HI PWR potentiometer R52 on PDM control board 1A1A2 slowly clockwise while observing the PA plate current on the isolated meter panel an...

Страница 50: ...5DV 250 350V IPA I 0 0 9 1 lA b 9 1 lA 0 9 1 lA 0 9 1 lA 0 9 1 lA RF DVR I 0 7 9A 7 9A 7 9A 7 9A 7 9A RF DVR V 55 60V 45 SOV 45 50V 45 50V 45 50V 45 SOV SUPPLY I 0 0 0 4 0 SA 0 6 0 7A 0 09 0 llA 0 14 0 18A SUPPLY V 0 13 5 15 kV IJ 3 14 kV 12 5 13 5 kV 13 5 14 5kV 13 5 14 5kV FIL V 92 92 92 92 92 92 ISOLATED METER PANEL PLATE I 0 0 05A 1 15A 1 16A 525 550A 525 550A GRID I 0 250 280 mA 1240 270 mA 2...

Страница 51: ...own accurate means This output should occur when the plate voltage is approximately 5300 volts plate current is 1 15 amperes and the supply current is 0 5 amperes 3 Operate the power meter switch to the REFLECTED position and null the meter using variable capacitor 1A8C3 refer to figure 3 3 Turn the transmitter off Remove the retaining screws invert and reinstall the Directional Coupler in the tra...

Страница 52: ...Verify that power output is over 5000 wat ts and that supply current is less than 0 50 amperes u Operate the power meter switch on the right meter panel to EFFI CIENCY position If power meter does not indicate midscale open the meter panel and adjust EFFICIENCY METER ADJUST potentiometer 1A9R4 for a 1 2 scale reading refer to figure 3 3 v With the power meter switch in the EFFICIENCY position adju...

Страница 53: ...t The power amplifier GRID RESONATOR may be adjusted slightly to reduce the distortion but must not be adjusted to cause more than a 50 volt increase in the PA plate voltage PA plate voltage should dip when the GRID EFFICIENCY control is tuned correctly If a transformer shutdown occurs and the HV Protection LED is illuminated an adjustment of the HV GAIN potentiometer will be necessary Adjust the ...

Страница 54: ...maximum of 60 mA AUX DRIVER current ac At frequencies above 5000 Hz sideband clipping can occur at modulation levels due to high Q antenna systems Measure distortion at 50 percent and then increase modulation percentage in 10 percent increments checking distortion at each level If the distortion should suddenly increase at a modulation level of less than 95 percent the antenna should be carefully ...

Страница 55: ...e as possible without the circuit tripping under normal modulation conditions ah If the sensitivity adjustment is to be completed without the aid of an Audio Generator circuit trips may occur when modu lating signals in the 90 130 Hz range This will result in unwanted transmitter shutdown In this case the transmitter can be immediately restored to operation If unwanted circuit trips occur during t...

Страница 56: ... REMOTE PA PLATE CURRENT METER 1A7M2 CALIBRATION a With the transmitter operating at high power 5 kW adjust TRACKING potentiometer 1A7Rl until meter 1A7M2 indicates the same as meter 1A3Ml b Switch to low power output 1 kW and adjust CALIBRATION poten tiometer 1A7R4 until meter 1A7M2 indicates the same as meter 1A3Ml c Repeat steps a and b as required to obtain meter indications within 1 percent o...

Страница 57: ...h power and record the readings of the PLATE CURRENT meter and also the remote plate current meter i Switch the transmitter to operate at low power again record the readings as in step h The percentage of decrease between the high and low power readings on the PLATE CURRENT meter and the remote meter should be within 2 percent of each other j If the percentage does not fall within the 2 percent to...

Страница 58: ...meter 1A2A2R23 to midrange Refer to figure 3 9 for location of 1A2A2R23 c Operate the transmitter at high power output 5 kW d Adjust CALIBRATE potentiometer 1A2A2R24 until the reading dis played on the PA PLATE VOLTS meter matches the reading displayed on the remote meter Refer to figure 3 9 for location of 1A2A2R24 e Operate the transmitter at low power 1 kW f Adjust TRACKING potentiometer 1A2A2R...

Страница 59: ...entiometer 1A2A2R24 to midrange and adjust remote Ep potentiometer to midrange Operate transmitter for high power output and adjust remote Ep potentiometer such that remote meter indicates same reading as the transmitter voltage meter If unable to adjust remote meter adjust 1A2A2R24 counterclockwise then adjust remote Ep poten tiometer Continue t o calibrate fixture E meter with the fixture Ep pot...

Страница 60: ...6 DB CHANGE IN MODULATION OVERMODULATION IF SWITCHED TO BYPASS UNDERMODULATION IF SWITCHED TO OPERA TIONAL THE OPERATOR MUST CHANGE THE MODULATION LEVEL AT THE AUDIO INPUT TERMINALS OF THE TRANSMITTER ACCORDING TO THE SETTING OF THE SWITCH ADD 6 DB WHEN SWITCHING TO THE OPERATIONAL POSI TION REMOVE 6 DB WHEN SWITCHING TO THE BYPASS POSITION 3 6 This operating procedure is presented under the assum...

Страница 61: ...www SteamPoweredRadio Com Figure 3 1 External Meter and Control Panels 1A7 and 1A9 Controls and Indicators 3 2 888 2109 010 WARNING Disconnect primary power prior to servicing ...

Страница 62: ...ng of PA plate current when cabinet front doors are closed Indicates voltage across PA tube Indicates forward power reflected pow er or relative efficiency as selected by 1A9S2 Selects forward power reflected power or relative efficiency for display on POWER OUTPUT meter When depressed extinguishes all FAULT INDICATORS Illuminates when arc gap 1E3 1E4 or 1E5 fires Illuminates when transmitter has ...

Страница 63: ... When depressed deactivates high volt age circuits When depressed activates high voltage circuits switch indicator illuminates green When depressed switches transmitter to high power condition switch indicator illuminates yellow When depressed switches transmitter to low power condition switch indicator illuminates blue When depressed starts activates filaments illuminates green blower motor and s...

Страница 64: ...www SteamPoweredRadio Com Figure 3 2 Meter Panel 1A7 Controls 888 2109 010 3 5 WARNING Disconnect primary power prior to servicing ...

Страница 65: ...meter 1A7R4 FILAMENT VOLTAGE METER CAL Potentiometer 1A7R8 FUNCTION Adjusts to calibrate REMOTE PA PLATE CURRENT meter for high power output Adjusts to calibrate REMOTE PA PLATE CURRENT meter for low power output Adjusts MULTIMETER to indicate 100 per cent when modulator and power amplifier filament voltage is correct 888 2109 010 WARNING Disconnect primary power prior to servicing ...

Страница 66: ...www SteamPoweredRadio Com 5 Figure 3 3 Meter Panel 1A9 and Directional Coupler 1A8 Controls 888 2109 010 3 7 WARNING Disconnect primary power prior to servicing ...

Страница 67: ...elative operational reference Adjusts POWER OUTPUT meter for accurate indication of reflected power C3 Variable Capacitor Adjusts reflected voltage sample to 1A8C3 equal reflected current sample FWD CALIBRATE Potentiometer 1A8R7 Power Out Sample not marked Adjusts POWER OUTPUT Meter for accurate indication of forward power Provides test point to verify presence of transmitter output sample voltage...

Страница 68: ...www SteamPoweredRadio Com Figure 3 4 Carrier Tuning Controls And HV Protection Controls And Indicators 888 2109 010 WARNING Disconnect primary power prior to servicing 3 9 ...

Страница 69: ...um plate current Adjusts the required carrier level out put normally 1 2 ampere Ip Adjusts to minimize 2nd harmonic radia tion 3rd HARMONIC TRAP Adjusts to minimize 3rd harmonic radia Variable Inductor 1L9 tion GROUND TEST POINT TP3 HIGH VOLTAGE FAULT LED DSl GAIN ADJUST Potentiometer R7 TEST POINT TPl TEST POINT TP2 Test point 3 Connected to transmitter ground Illuminates when the 100 120 Hz ripp...

Страница 70: ...www SteamPoweredRadio Com Figure 3 5 AC Power Panel 1A4 Controls and Indicators 888 2109 010 3 11 WARNING Disconnect primary power prior to servicing ...

Страница 71: ...rloads MOD FILAMENT 3 ampere Provides protection for modulator fila Circuit Breaker ment circuit overloads 1A4CB4 230 VOLTS 30 15 ampere Circuit Breakers 1A4CB1 CB2 CB3 FILAMENT HOURS Meter 1A4Ml DC OVERLOAD Variable Resistor 1A4R9 CONTROL Switch 1A4Sl MOD SCN VOLTAGE HI POWER Variable Resistor 1A4Rl0 Provide protection for each phase of 3 phase circuit exclusive of high volt age supply Displays c...

Страница 72: ...OW POWER Adjusts modulator screen voltage when Variable Resistor operating in low power mode Full 1A4R5 range adjustment provides 15 percent change 11 FILAMENT VOLTAGE Adjusts filament voltage of power amp Variable Resistor lifier tube and modulator tube 1A4R4 888 2109 010 3 13 WARNING Disconnect primary power prior to servicing ...

Страница 73: ...www SteamPoweredRadio Com Figure 3 6 Isolated Plate 1A3 Modulation Enhancer 1AlA4 and Fine Power Adjust Controls and Indicators 3 14 888 2109 010 WARNING Disconnect primary power prior to servicing ...

Страница 74: ...ifier Indicates total grid current through power amplifier Adjusts power amplifier grid circuit to carrier frequency resonance maximum power amplifier grid current Adjusts power amplifier grid waveforms to most efficient operating shape minimum voltage on PA PLATE VOLTS meter Adjusts to minimize power amplifier grid to plate capacitance CAL OUT position permits initial set up without enhancement E...

Страница 75: ...nued REF Fig 3 6 11 12 CONTROL INDICATOR POWER Indicator 1AlA4DSl Fine Power Adjust POWER ADJUST Motor Driven Potentiometer 1AlR2 FUNCTION Illuminates to indicate that enhancer power supply circuit is operating Adjusts for minor changes fine tuning of power output 3 16 888 2109 010 WARNING Disconnect primary power prior to servicing ...

Страница 76: ...www SteamPoweredRadio Com Figure 3 7 PDM Chassis lAl and RF Driver and Overload 1A2 Controls and Indicators 888 2109 010 WARNING Disconnect primary power prior to servicing 3 17 ...

Страница 77: ...ut is routed directly to the audio input and overload module circuit AUX MOD ADJUST Adjusts for optimum drive conditions as Potentiometer 1AlR3 required at modulator grid AUX DRIVER ADJUST Adjusts for optimum current conditions Potentiometer 1A1A3R8 as required at modulator grid FAULT Al through FAULT A5 Indicators 1A2A3DS2 through DS5 IPA OUTPUT ADJUST Potentiometer 1A2A3R4 Illuminate to indicate...

Страница 78: ...www SteamPoweredRadio Com 11 10 BEHIND TRANSFORMER 1 Figure 3 8 PDM Chassis 1A1 Controls and Indicators 888 2109 010 WARNING Disconnect primary power prior to servicing 2 3 3 19 ...

Страница 79: ...low power audio in put at same level as high power audio input Jumper position adjusts hum phase Jumper to be positioned for greatest signal to noise ratio Adjusts input amplifier common mode re jection ratio at low frequencies Allows Bessel low pass filter to be in serted in audio input circuitry for overshoot reduction and anti aliasing protection Potentiometer R29 adjusts hum injection level Po...

Страница 80: ...s lAl Controls and Indicators Continued REF CONTROL INDICATOR FUNCTION Fig 3 8 11 LO PWR Adjusts rf carrier output when opera Potentiometer ting in the lower power mode 1A1A2R53 888 2109 010 3 21 WARNING Disconnect primary power prior to servicing ...

Страница 81: ...www SteamPoweredRadio Com Figure 3 9 RF Driver and Overload 1A2 Controls and Indicators 3 22 888 2109 010 WARNING Disconnect primary power prior to servicing ...

Страница 82: ...ON OFF Position Causes immediate high voltage shutdown when overload occurs ON Position When overload occurs attempts to recycle transmitter on three or four times before high volt age shutdown Adjusts to calibrate remote Ep meter Adjust tracking range Adjusts to set threshold of operational amplifier 1A2A2Ul Adjusts VSWR overload threshold Adjusts to trim carrier frequency of oscillator if2 Adjus...

Страница 83: ... are closed and the blower is operating Allow a 30 second warmup interval h Depress the POWER HIGH or POWER LOW pushbutton switch for the desired output power i Depress the HIGH VOLTAGE pushbutton switch The transmitter is now operating at the selected power output 3 7 MODULATION ENHANCER 3 8 If modulation enhancement is desired set the OPERATIONAL BYPASS switch to OPERATIONAL Adjust the Modulatio...

Страница 84: ...NG 1 dB 2 dB or 3 dB switch and adjust the NEG PEAK potentiometer Rl6 and P0S PEAK potentiometer R20 controls for maximum negative and positive peaks without overmod ulating 888 2109 010 3 25 3 26 WARNING Disconnect primary power prior to servicing ...

Страница 85: ...www SteamPoweredRadio Com ...

Страница 86: ...sists of conventional L sections and provides 225 degrees of phase shift which reduces interaction between plate and loading controls during tune up 4 7 AUDIO SUBSYSTEM 4 8 The Audio Subsystem includes the Modulation Enhancer Audio Input Circuit located on the PDM control and feedback board PDM Board Audio Dri ver the Modulator Tube and the 75 kHz Filter 4 9 The Modulation Enhancer consists of an ...

Страница 87: ...is subsystem includes the following circuits and devices for the protection of personnel and transmitter equipment a Safety interlock b DC overload c Dissipation limiter overload d Modulator screen overload e VSWR overload f Step start overload g Overload counter and turn off h Air interlock i High Voltage transformer imbalance overload 4 15 SAFETY INTERLOCK CIRCUIT 4 16 All front and rear access ...

Страница 88: ...ER 1 1 BESSEL FILTER PROTECTIVE CIRCUITS I l H00ULATI0N OETHTOR MOOULAT I Otl TRACKING I Rf ORI VER Rf ORI VER Rf ORI VER Rf DRIVER POM AMPLI f I ER AUDIO ORI VER r I I r I I I I r I I 70 kHL I fllTfR I L __ POYER AMPLIFIER Jcx2soon OUTPUT NETWORK I I I ISOLATED I _ _ E l U J I I I I I I t I _ _ _ J DAMPER MODULATOR liCX3000A Figure 4 1 MW 5B AM BROADCAST TRANSMITTER Overall Block Diagram HV POWER...

Страница 89: ...ow er amplifier plate voltage to cut off With the plate voltage off the rf output power drops to zero The recycle sequence is the same as with de _ overloads 4 25 STEP START OVERLOAD 4 26 This circuit consists of relay lA4AlK4 and associated circuitry located on the printed circuit board which is mounted on the back of AC Power Panel 1A4 If a short occurs in the High Voltage Power Supply or high v...

Страница 90: ...Rl Crystals Yl and Y2 operate at either two times or four times the transmitter carrier frequency For carrier frequencies between 535 and 1250 kHz the oscillators operate at four times the carrier frequency For carrier frequencies between 1251 and 1605 kHz the oscillators operate at twice the carrier frequency Because the oscillators always operate within a stable frequency range the need for temp...

Страница 91: ...ate 4 42 When a dissipation overload occurs a ground input via diode CR6 to c Zener diode CRl causes the oscillator output to go to zero volts 4 43 IPA AND RF DRIVERS 1A2A3 The IPA and the four rf driver modules are identical units with the exception of two jumpers added when a module is used as the IPA stage Transistors Ql and Q2 are connected to operate in push pull switching mode Transformer Tl...

Страница 92: ...or 1Cl2 tuning capacitor 1Cl4 together with the power amplifier tube capacity form the resonant 3rd harmonic efficiency circuit The remainder of the output net work consists of conventional L sections to provide matching facilities for the plate circuit of the power amplifier into the desired load impedance A 225 degree phase shift across the output network reduces interaction of plate and loading...

Страница 93: ...dio input signal appear as the duty cycle change of constant amplitude rectangular waves 4 56 PDM Board lAlAl Transistor Ql forms a 75 kHz LC oscillator Cry stal control is not necessary as the frequency output is not critical Capacitor C4 functions as a blocking capacitor and couples the output signal to the base of transistor Q2 Transistor Q2 is overdriven by the sine wave and forms a 20 volt pe...

Страница 94: ... response The de feedback from the dissipation control is inversely proportional to the dissipation of the power amplifier If power amplifier dissipation increases above a pre set value the threshold amplifier duty cycle changes to decrease the power output 4 60 During operation a bias is established which causes transistor Q3 to output a 75 kHz pulse of approximately 40 percent duty cycle When th...

Страница 95: ...H TRIANGLE WAVE AUDIO ONE CYCLE 5 KHZ SINE WAVE AAAP AAAAAAMAAAAAA AAAAAA vvj r V VY V rf V ITV KJVWVVvvv V V V V ii i i SUM AUDIO PLus iTRIANGLE WIDTH MODULATED PULSES ZERO MODULATl ON POSITIVE MODULATION TIME SCALE 13 MICROSECONDS EACH DIVISION Figure 4 3 PDM Waveforms NEGATIVE MODULATION RF OUTPUT ZERO MODULATION 4 10 888 2109 010 WARNING Disconnect primary power prior to servicing ...

Страница 96: ...s connected to terminal 2 of the Audio Driver board and provides additional modulation drive to the grid of the modulator tube The additional grid drive is required for high current pulses positive peaks which require more drive than low current pulses negative peaks The output of the Audio Driver is routed via terminal 10 directly to the grid of the modulator tube 4 65 MODULATOR TUBE CIRCUIT figu...

Страница 97: ...ency response The bessel turnover frequency is controlled by single resistor network R19 This resistor net work is socket installed and easily replaceable with other standard resistor networks Refer to Maintenance Section V for useable networks 4 72 DISSIPATION LIMITER Transistors Ql and Q2 form a part of a Schmitt trigger with transistor Ql biased by resistor R24 normally conducting A sampling of...

Страница 98: ...one through a power failure is an aid in isolating problems in the transmitter or antenna system Depressing the RESET pushbutton switch resets the latching relays NOTE Some overloads cause the high voltage capacitors to discharge with a loud audible sound 4 77 Arc Overloads Refer to figures 8 1 and 8 2 Power line transients failure of components in the 75 kHz filter or failure of the damper diode ...

Страница 99: ...elay 1A2A2K5 to front panel to illumi through diode CR14 and The transmitter then 4 82 Overload Counter Plus 30 volts is placed on resistor R5 in series with the coil of relay K7 Whenever an overload occurs a ground is applied to energize relay K7 Switch Sl in the open position allows the transmit ter to recycle In the closed position switch Sl causes the transmitter to turn off at the first overl...

Страница 100: ...0 volt power supply is activated time delay relay 1A4AlTDl closes If front panel or remote HV ON pushbutton switch has been depressed relay K2 will be latched in the HV ON position Through the closure provided by time delay relay lA4AlTDl relay K3 and sub sequently relay K4 will close activating the high voltage supply In the event of a power failure time delay relay lA4AlTDl will open immediately...

Страница 101: ...ode CR2 and O voltage at terminal E2 of the Directional Coupler board 1A8 and a O indication on the reflected power meter The voltage at capacitor C4 and the voltage at resistor R4 will be equal but 180 degrees out of phase causing a voltage across diode CRl and a voltage to the forward power meter through terminal E3 As VSWR changes the in phase condition of resistor RS and capacitor CB will ceas...

Страница 102: ...noise level is excessive for greater than one period of 100 Hz the transmitter will be shut down by the DC Over load circuitry and the LED on the HV Protection Board will illuminate indi cating the cause of the shutdown The LED can be extinguished by depressing the RESET pushbutton for FAULT INDICATORS located on the meter panel 888 2109 010 4 17 4 18 WARNING Disconnect primary power prior to serv...

Страница 103: ...OGBOOK 5 8 As a minimum performance characteristic the transmitter should be monitored using front panel meters and the results recorded in the Trans mitter Logbook at each shift change at least once per day or as required by the appropriate regulatory agency 5 9 MAINTENANCE LOGBOOK 5 10 The maintenance logbook should contain a complete description of all maintenance activities required to keep th...

Страница 104: ...re provided as a safety feature They consist of a metal rod with a phenolic plastic handle The metal end is connected to the transmitter ground Before touching any component in the transmitter use the grounding stick and touch every component in the area or circuit on which maintenance is to be performed 5 14 PREVENTIVE MAINTENANCE 5 15 Preventive maintenance is a systematic series of operations p...

Страница 105: ...specified intervals and with specified lubricants to prevent mechanical wear and keep the equipment operating normally g Paint Paint steel surfaces with the original type of paint using a prime coat if necessary when inspection shows rust or worn or broken paint film 5 16 BLOWER FILTER CLEANING 5 17 A blower assembly is provided in the transmitter The blower filter is a replaceable washable cartri...

Страница 106: ...ntings are tight c Examine the body of each capacitor for swelling discoloration or other evidence of breakdown d Inspect oil filled or electrolytic capacitors for leakage signs e Use standard practices to repair poor solder connections with a low wattage soldering iron f Clean cases and bodies of all capacitors 5 24 FIXED RESISTORS Preventive maintenance of fixed resistors is accom plished by per...

Страница 107: ...loose terminal connections and insecure connecting lugs Dust dirt or moisture between terminals or a transformer may cause flashovers Insulating compound or oil around the base of a transformer indicates overheating or leakage c Tighten loose mounting lugs terminals or rivets d Clean with a dry lint free cloth or one moistened with an ap proved cleaning solvent e Clean corroded contacts or connect...

Страница 108: ...on with crocus cloth 5 29 RELAYS Replace hermetically sealed relays if they are defective Nonhermetically sealed relays are considered normal if the following condi tions exist a The relay is mounted securely b Connecting leads are not frayed and the insulation is not damaged c Terminal connections are tight and clean d Moving parts travel freely e Spring tension is correct f Contacts are clean ad...

Страница 109: ...itch by pulling the plastic cover indicator assembly from the case and rotating the assembly 90 degrees c Inspect indicator assemblies for broken or cracked covers loose envelopes loose mounting screws and loose or dirty connections d Tighten loose mounting screws solder loose connections If con nections are dirty or corroded clean with crocus cloth before soldering e Clean indicator covers bases ...

Страница 110: ...and checkout unless some component in the tuned circuit has been replaced due to component failure or has been replaced in order to accomplish an operating frequency change WARNING I DISABLE PRIMARY POWER TO THE TRANSMIT TER USE GROUNDING HOOK TO DISCHARGE ANY RESIDUAL POTENTIAL FROM ALL EXPOSED COMPONENTS BEFORE TOUCHING THEM NOTE If transmitter frequency change is re quired refer to figure 8 5 f...

Страница 111: ...e determined 5 44 A series of measurements should be made starting at 20 kHz below the carrier frequency to be used and measurements at each 5 kHz through 20 kHz above the carrier frequency to be used These measurements must be accur ate Plot these resistance and reactance values vs the frequencies at which they were taken Plot a curve through each set to determine the averages 5 45 After the ante...

Страница 112: ...ope f Reconnect the tubing disconnected in step b 5 49 Complete the following steps in the order listed to set the 3RD HAR MONIC TRAP 119 a Adjust 3RD HARMONIC TRAP control fully clockwise figure 3 4 Refer to b Disconnect the tubing from the top front end panel end of 119 3RD HARMONIC TRAP c Connect the signal generator tuned to three times the operating frequency and the oscilloscope as shown in ...

Страница 113: ... THE CENTER TAP OF PA FILAMENT TRANSFORMER 1T3 TO GROUND TO ENSURE THAT NO HIGH VOLTAGE IS PRESENT 5 53 Connect the impedance measuring equipment between the anode of the PA tube and ground Refer to figure 5 3 Tune the signal generator to three times the carrier frequency 3F With at least one half the turns of coil 118 active adjust plate resonator coil 115 for antiresonance parallel resonance at ...

Страница 114: ...292 10 8 1 43 388 06 0 70 335 08 7 1 07 286 11 1 1 44 385 06 2 71 322 09 3 1 08 280 11 4 1 45 382 06 3 72 310 09 9 1 09 275 11 6 1 46 379 06 5 73 298 10 5 1 10 269 11 9 1 47 376 06 6 74 286 11 1 11 1 264 12 2 1 48 373 06 8 75 275 11 6 1 12 258 12 5 1 49 370 06 9 76 264 12 2 1 13 253 12 7 1 50 367 07 1 77 253 12 7 1 14 250 12 9 1 51 364 07 2 78 242 13 3 1 15 245 13 1 1 52 361 07 4 79 232 13 8 1 16 ...

Страница 115: ...3 m 0 i u o 0 I 9 fl 00 00 00 I N 0 I 0 I w OQ 11 fl I w fl rt 1 1V2 3CX2500F3 w 11 p 0 I n SIGNAL GENERATOR Jr 0 rt 0 11 lLS J t I 1 8 I LlO 1Ll3 1Cl3 ICl3A IC14 lC18 1CJ9 l l l I 1C2 I l I 11 12 J C22 rC20 l PROBE 1 172K OIIM 10SJ OHM OSCILLOSCOPE ...

Страница 116: ...e positive reactance at the PA tube plate 5 59 Repeat the process until a reactance of 1350 _jO is obtained 5 60 Retune the signal generator to three times the carrier frequency 3f and check coil 1L5 for paraliel reactance 5 61 The following presentation is a method of a rough tune up that may be used if impedance measuring equipment is not available WARNING I DISABLE PRIMARY POWER TO THE TRANSMIT...

Страница 117: ... 0 II ll 0 j i 0 er 0 II 5 p 00 00 00 I N 0 I 0 Vl I Vl 1V2 3CX2500F3 DETECTOR RF BRIDGE SIGNAL GENERATOR r 1 F l 5 1L8 H1Cl3 1Cl3A 1Cl4 1 Cl8 1Cl9 l l l rC20 Figure 5 4 Set Up for Output Network Test 11 10 1C21 l 51 OIIM IL12 I 2W IC22 I ...

Страница 118: ...0 z z 0 0 n 0 n 3 1 0 15 0 l 5 V I a CX CX CX I N 0 I 0 JV2 3CX2500F3 DETECTOR RF BRIDGE SIGNAL GENERATOR t lE 1 L8 JC13 1Cl3A 1Cl4 1Cl8 l l l rC2Q Figure 5 5 Phase Shift Test JI IO 1C2l l 11 12 1C22 I 51 OIIM 1 ZW SIIORT IIEKE ...

Страница 119: ...ion to read the voltage at the 51 ohm 1 2 watt resistor connected to the transmitter out put Refer to figure 5 6 The oscilloscope reading at this point should be 0 78 major divisions if the loading is correct if so no further loading adjustment is needed 1 If the loading is less than 0 78 major divisions adjust PA LOAD coil 1113 to increase the active turns of the coil by one turn Do not change th...

Страница 120: ... 5 P Ln I 00 00 00 00 I N 0 I 0 0 __ 1V2 3CXI 5 000113 SIGNAL GENERATOR IF 1L5 I 1 8 VV V LIO H1Cl3 ICl3A ICl4 ICl8 ri C I9 1 l l lC2 J_ Xiu2 ff 51 OIIM l 2 l 2W IC20 I2K Ol M 051 OHM OSCILLOSCOPE Figure 5 6 Ratio of Load Voltage to Plate Voltage Test __ _ __ ...

Страница 121: ...sion in dication is observed on the oscilloscope g Recheck the 3rd Harmonic Resonator tuning as outlined previously in this section 5 63 If the frequency is to be changed it will b e necessary to use impe dance measuring equipment to adjust the antenna coupling equipment This is true even in the case of one single non directional tower with a simple T network coupled to a coaxial transmission line...

Страница 122: ...Com 0 z z 0 n 0 O ii O i O 15 0 tn 5 lJ1 I N 0 00 00 00 I N 0 I 0 0 1A2A3C3A B C 1 1 l SIGNAL GENERATOR 510 OHM l 2W CAR i F QUENCYI V 0 OSCILLOSCOPE Figure 5 7 Rough Tune Up Test Set Up 1A3Tl 1A3Cl _y r 1 1A3ClA 1J l A3ClB ...

Страница 123: ...A minimum deflection on the oscilloscope will indicate that the correct frequency determined capacitors are installed g Reconnect the components disconnected in step d 5 65 The following procedure should be followed if it becomes necessary to adjust capacitor 1A3Cl as a result of replacing the PA tube or in the case of a frequency change WARNING I USE THE GROUNDING HOOK TO DISCHARGE ANY RESIDUAL P...

Страница 124: ...scope i Adjust NEUT capacitor 1A3C3 for a minimum deflection on the os cilloscope j Repeat steps e f g h and i as necessary 5 66 The following procedure should be followed if it becomes necessary to adjust NEUT capacitor 1A3C3 during routine maintenance or after a PA tube replacement WARNING I USE THE GROUNDING HOOK TO DISCHARGE ANY RESIDUAL POTENTIAL FROM ALL OF THE EX POSED COMPONENTS BEFORE TOU...

Страница 125: ...ust GRID TUNE capacitor 1A3Cl for a maximum indication on the oscilloscope i Repeat steps g and h as necessary j Depress HIGH VOLTAGE OFF and FILAMENT OFF pushbutton switches and remove the left rear transmitter panel WARNING I USE THE GROUNDING HOOK TO DISCHARGE ANY RESIDUAL POTENTIAL FROM ALL OF THE EX POSED COMPONENTS BEFORE TOUCHING THEM k Disconnect the oscilloscope lead disconnect the clip l...

Страница 126: ...ing procedure should be followed for Oscillator IPA and RF Driver alignment after a frequency determining component has been re 1 placed or the carrier frequency of the transmitter has been changed NOTE If transmitter frequency change is re quired refer to figure 8 5 for the required frequency determined com ponents a The following test equipment may be needed for this adjustment 1 Several lengths...

Страница 127: ...1 ADJUST 1A3C2 TO HALF MESH l 2W 5 lK OHM 2 ADJUST TAP ON 1A3Ll FOR MAXIMUM OSCILLOSCOPE DEFLECTION 3 ADJUST 1A3C2 FOR MAXIMUM DEFLECTION Figure 5 8 Adjustment of Grid Efficiency Capacitor 1A3C2 888 2109 010 WARNING Disconnect primary power prior to servicing 5 25 ...

Страница 128: ...from terminal 5 figure 2 2 sheet 5 located on the right rear portion of oscillator board to chassis ground f Open the RF Driver interlocked panel WARNING I USE THE GROUNDING HOOK TO DISCHARGE ANY RESIDUAL POTENTIAL FROM ALL EXPOSED COMPONENTS BEFORE TOUCHING THEM g Remove RF Driver fuses 1A2A3Fl through F5 h Close and latch the RF Driver interlocked panel i Depress FILAMENT ON pushbutton switch j ...

Страница 129: ...A2A3Ll for a 30 volt p p sine wave v Depress FILAMENT OFF pushbutton switch w Disconnect oscilloscope lead from terminal 3 x Disconnect the clip lead connected to terminal 5 5 71 IPA TUNING The following procedure should be followed to check alignment of the IPA section after a frequency determined component or the carrier frequency of the transmitter has been changed a Depress FILAMENT OFF pushbu...

Страница 130: ...TENTIAL FROM ALL EXPOSED COMPONENTS BEFORE TOUCHING THEM coil 1A2A3L2 slug retaining bar and move the coil as necessary a small amount Close IPA RF Driver panel Depress FILAMENT ON pushbutton switch the slug into or Tighten retaining q Observe the waveform displayed on the oscilloscope screen at this time The waveform must be symmetrical 30 volt p p with slight ringing If it is not symmetrical it ...

Страница 131: ...ould be followed to check the rf driver section after a frequency determined component or the carrier frequency has been changed a Depress HIGH VOLTAGE OFF pushbutton switch b Depress FILAMENT OFF pushbutton switch WARNING I DISCONNECT AND LOCK OUT STATION POWER TO THE TRANSMITTER c Remove front lower right panel by removing the six cross re cessed head screws WARNING I USE THE GROUNDING HOOK AND ...

Страница 132: ... output terminal 3 of A2 module j Close the RF Driver interlocked panel k Connect the clip lead from terminal 5 figure 2 2 sheet 5 located on the right rear portion of oscillator board to chassis ground 1 Enable station power to the transmitter m Depress FILAMENT ON pushbutton switch n Adjust GRID TUNE control for maximum drive o Verify output of A2 module connected to the oscilloscope for at leas...

Страница 133: ...the slug rack x As a final check connect the oscilloscope probe to each module A2 through A3 in turn to ensure that a square wave with a sym metrical duty cycle is presented on the oscilloscope screen for each module Follow the appropriate steps for opening and securing the RF Driver interlocked panel y Alternately adjust GRID TUNE control and coil 1A2A3L3 through 16 slug rack for maximum GRID cur...

Страница 134: ...ficiency Tuning check WARNING I USE EXTREME CAUTION WHEN INSERTING PROBE THROUGH THE PA ENCLOSURE SCREEN DANGEROUS HIGH VOLTAGE IS PRESENT IN THE ENCLOSURE a Place the oscilloscope probe through the top screen approximately 1 inch into the PA enclosure Depress HIGH VOLTAGE ON pushbutton switch adjust PA PLATE EFFICIENCY RESONATOR control 115 for a maximum efficiency reading on the power meter and ...

Страница 135: ...www SteamPoweredRadio Com THIS NOT THIS Figure 5 9 Correct Power Amplifier Waveform Requirements 888 2109 010 5 33 WARNING Disconnect primary power prior to servicing ...

Страница 136: ...a Depress HIGH VOLTAGE OFF pushbutton switch b Depress FILAMENT OFF pushbutton switch c Connect a volt ohm meter from terminal printed circuit board 1A2A2 to ground ohms Disconnect meter leads d Depress FILAMENT ON pushbutton switch 13 on Fault and Overload Reading should be 10 e Depress HIGH VOLTAGE ON pushbutton switch f Connect one end of a clip lead to terminal 2 line side of Oscil lator Amp 1...

Страница 137: ... do not touch any part of the transmitter e Reinstall lower left rear transmitter panel f Lower PDM chassis 1Al panel g Adjust HI PWR potentiometer 1A1A2R52 fully counterclockwise Refer to figure 3 8 for location h Enable station input power to the transmitter i Depress FILAMENT ON pushbutton switch j Depress HIGH VOLTAGE ON pushbutton switch pushbutton switch light will illuminate but be applied ...

Страница 138: ...l lower left rear transmitter panel 5 81 The following is a procedure for checking the VSWR overload sensitiv ity circuitry a Depress the FILAMENT OFF pushbutton switch and the HIGH VOLTAGE OFF pushbutton switch b Remove right hand meter panel for access to the directional cou pler retaining screws c Remove the four directional coupler retaining screws remove the Directional Coupler from the panel...

Страница 139: ...H VOLTAGE ON pushbutton switch c Adjust for desired output power Modulate 100 percent with a 20 Hz tone d Adjust DC OVERLOAD rheostat 1A4R9 clockwise until transmitter power trips off Refer to figure 3 5 for location of rheostat 1A4R9 Adjust rheostat 1A4R9 counterclockwise one sixteenth turn e Depress HIGH VOLTAGE OFF pushbutton switch f Depress FILAMENT OFF pushbutton switch 5 83 The following is...

Страница 140: ... DISCONNECT CIRCUIT BREAKER TO OFF USE THE GROUNDING HOOK TO DISCHARGE ANY RESIDUAL POTENTIAL FROM ALL COMPONENTS BEFORE TOUCHING THEM c Release the two lower fasteners on the lower right rear panel and prop the lower edge of the panel open approximately one inch d Depress FILAMENT ON pushbutton switch e Blower 1A41Bl should run but relay 1A4K6 should not energize f If relay 1A4K6 energizes remove...

Страница 141: ...e plate voltage meter mechanically by adjusting the mech anical zero on the meter WARNING I USE GROUNDING HOOK TO DISCHARGE RESIDU AL POTENTIAL FROM ALL EXPOSED COMPO NENTS BEFORE TOUCHING THEM b Open AC Power Panel 1A4 lower panel of front right hand section of transmitter cabinet c Remove lower wire number 61 from circuit breaker 1A4CB9 In sulate the lug end of the wire and position it in such a...

Страница 142: ...BEFORE TOUCHING THEM 1 Reconnect wire number 61 to circuit breaker 1A4CB9 m Close and securely latch the AC Power Panel n Enable station primary ac power to the transmitter o Depress FILAMENT ON pushbutton switch p Depress HIGH VOLTAGE ON pushbutton switch q Adjust HI PWR potentiometer 1A1A2R52 located on the PDM printed circuit board for the required full power output r Depress HIGH VOLTAGE OFF p...

Страница 143: ...ltages 1 Transistor Q3 emitter 14 0 l OV 2 Transistor Q4 emitter 14 0 l OV c Jumper terminals G and H together and drive against ground using a low distortion oscillator with an output impedance of 600 ohms or less d Connect an oscilloscope to pin 8 of integrated circuit UlC e Adjust the oscillator output to O dBm at 60 Hz and adjust CMRR potentiometer R66 for null Null depth must be greater than ...

Страница 144: ...ION TRACKING potentiometer R41 for 0 0 Vdc indication on the meter h While monitoring the station modulation monitor alternately de press POWER HIGH pushbutton switch and POWER LOW pushbutton switch If modulation level changes more than 1 for a 20 change in power level adjust MODULATION TRACKING potentiometer R41 CW Potentiometer R41 will vary absolute modulation levels therefore it will be necess...

Страница 145: ...o pro duce a steady base line capacitor G4S should be replaced with a lesser value to correct the problem 5 95 DISTORTION MINIMIZATION 5 96 Systematic adjustment as outlined in the following steps will normal ly result in a significant reduction of distortion products generated by the transmitter a Adjust plate tuning plate efficiency resonator grid tuning and grid efficiency resonator with no mod...

Страница 146: ...ll not show a clear THD null at high audio frequencies This control should be adjusted to the point where THD is just on the edge of increasing After adjustment THD should be once again checked at 400 Hz and compared with previous results In some transmitters a slight tradeoff in midband distortion is neces sary in order to reduce high frequency distortion h A small adjustment of GRID EFFICIENCY c...

Страница 147: ...tacted through a TWX facility 910 246 3212 or a TELEX service 247319 6 6 Separate paragraphs are provided for common trouble sympt oms In cluded within these paragraphs are lists of the most probable causes of the trouble and where it is not otherwise obvious the required corrective action Included in this section are paragraphs covering the following symptoms SYMPTOM TRANSMITTER TOTALLY INOPERATI...

Страница 148: ...D LOW VOLTS FAILS TO STAY ON a Thermal cutout of blower motor Internal to motor 1 Belt tension too tight Refer to figure 2 6 for adjustment 2 Blower or motor bearing binding 3 Excessive exhaust system back pressure b Air switch sensitivity problem 1 Rear PA panel off or not secure 2 Sensor tube restricted 3 Sensitivity setting wrong Refer to paragraph 5 85 for ad justment 4 Defective air switch a ...

Страница 149: ...tage ON loop circuit open 1 lA4AlTDl contacts 1A4Al terminal 12 13 2 1A4K2 contacts 1A4Al terminal 12 6 3 lA4AlK2 contacts 1A4Al terminal 6 3 4 1A4A1Kl contacts 1A4Al terminal 6 3 5 1A4Kl contacts on relay terminal 9 10 6 10 HIGH VOLTAGE IMMED ATELY SHUTS DOWN WHEN PLATE ON PUSHBUTTON SWITCH DEPRESSED a PDM full on causing de overload Refer to paragraph 2 24 step n 1 POWER potentiometer R52 on 1Al...

Страница 150: ...urrent caused by defective diode lA2AlCR2 on oscillator board b Open cathode in PA stage V2 c Open choke 1A3L2 d Internal short in PA stage V2 c No mod bias volts 1 BIAS SUPPLY circuit breaker CBS tripped 2 Bias supply lA5 component failure 3 Audio driver 1AlA3 component failure 4 Modulator tube Vl internal short d Step start overload sensor triggered Refer to paragraph 2 25 e Shut down as a resul...

Страница 151: ...stallation into all lugs 3 Check the high voltage rectifiers as follows a Using an ohmmeter check each rectifier to ensure that none are open or shorted In the forward direction the resistance will typically be 450k ohms measured on the RXl0 000 scale In the reverse direction the recti fiers should read open infinity Check all rectifier terminals for proper solder connections Also check all wires ...

Страница 152: ... FAULT IS TO RULE OUT OTHER FAULT POSSIBILITIES RECTIFIERS WIRING 3 PHASE POWER h If the HIGH VOLTAGE FAULT indicator is still illuminated after all possible transformer and rectifier problems have been eliminated check to see if the HV Transformer Protection board is erroneously sensing errors Depress the FILAMENT ON pushbutton switch and then the FAULT RESET pushbutton switch This should clear t...

Страница 153: ...6 12 POOR OR NO MODULATION CAPABILITY a Inoperative Modulation Enhancer table 6 1 b Malfunction on input board 1AlA2 c Malfunction on audio driver board 1AlA3 d PDM frequency has drifted e Defective coil lLl 1L2 or 1L3 f PA tube low emission g Incorrect audio input to transmitter external h Modulator tube 6 13 POOR PERFORMANCE a Poor positive peak capability 1 Audio processing equipment not proper...

Страница 154: ...75 kHz oscillator improperly adjusted 5 Auxiliary Driver improperly adjusted 6 75 kHz filter coils 111 112 113 defective 7 Audio input board 1AlA2 malfunction 8 Audio driver board 1AlA3 malfunction 9 Modulator tube weak 10 Coupling Zener diodes on lA1Al 1AlA3 defective d Noise 1 Improper station equipment grounding 2 Open HV filter capacitors lCl 1Cl5 3 75 kHz oscillator off frequency 4 3 phase li...

Страница 155: ...off but can be restored to operation it probably indicated a temporary imbalance in the operation of the High Voltage Power Supply Possible causes might be one of the following a Momentary loss of an ac phase b Three phase line imbalance changed since adjustment c Loose transformer connections d Insufficient 1Cl5 capacitance 2 If the transformer remains off refer to paragraph 6 10 for corrective a...

Страница 156: ...nsmission line impedance change 4 Lightning 5 Antenna coupling unit problems 6 Ball gap across tower base fired 6 15 MODULATION ENHANCER MALFUNCTION 6 16 Refer to table 6 1 for troubleshooting of the Modulation Enhancer 6 17 RF OSCILLATOR MODULE 1A2Al MALFUNCTION 6 18 Refer to table 6 2 for troubleshooting of the RF Oscillator module 6 19 PDM MODULE 1A1A1 MALFUNCTION 6 20 Refer to table 6 3 for tr...

Страница 157: ...adjustment 1 Transistor Ql or 1 Replace defective has no effect on Q2 shorted transistor negative peak clipping 2 Diode CRS shorted 2 Replace diode 3 Resistor Rl6 open 3 Replace resistor Negative clipping occurs 1 Faulty LED 1 Replace LED but no indication on LED DS2 POS PEAK adjustment has 1 Transistor Q3 or 1 Replace defective no effect on positive Q4 shorted transistor peak clipping 2 Diode CR7...

Страница 158: ...pushbutton switch depressed 2 Relay 1A2A1Kl defective NOTE Test relay Kl by connecting ground to terminal 5 of 1A2Al 888 2109 010 CORRECTIVE ACTION la Replace defective fuse 2a Check 30 volt power supply A24 MULTI METER switch in the 30 VOLT SUPPLY posi tion 3a Locate and repair defective wiring la Disconnect wire on terminal 3 from the module Connect a VOM to the circuit side of fuse Fl and check...

Страница 159: ...onent 1 Integrated circuit Ul defective 1 Integrated circuit Ul defective 888 2109 010 CORRECTIVE ACTION 3a Replace crystal Yl 4a Test oscillator and replace defective component la Connect the positive VOM lead to the junction of coil 11 resistor R17 diode CR4 and transistor Q3 and the negative lead to chassis ground Voltage measurement should be approximately 3 Vdc to 5Vdc with os cillator Y2 rem...

Страница 160: ...cate and replace stage component defective output stage components Emitter bias voltage 1 Defective transis la Perform check of incorrect tor Q4 or associa emitter bias voltage ted circuit of transistor Q4 Voltage measurement should be approx mately 6 to 10 volts Replace de fective transistor 6 14 888 2109 010 WARNING Disconnect primary power prior to servicing ...

Страница 161: ...ion of resistors R7 RS R9 1 Fuse lAlFl open 2 39 volt Zener diode lAlCRl defective 3 Transistor lA1AlQ4 or Q5 defective 4 Zener diode CR4 and or CR5 shorted 1 Transistor lA1AlQ3 defective 2 Loss of drive from high low power adjust circuit 1 Transistor lAlAlQl or Q2 defective 2 Diode lAlAlCRl or CR2 open or shorted 888 2109 010 1 Replace fuse lAlFl 2 Replace Zener diode lAlCRl 3 Replace defective t...

Страница 162: ... or capacitor AlCl AlC2 shorted 4 Transformer Tl assembly defective NOTE 1 Replace capacitor 2 Replace transformer assembly 1 Replace fuse if fuse continues to open check for other pro bable causes 2 Replace defective transistor 3 Replace defective resistor or capaci tor 4 Replace defective transformer assembly A VOM is used to make power checks 60 80 Vdc power not pre 1 Fuse Fl open 1 Replace fus...

Страница 163: ...parts other than those specified In every case how ever a substitute part is selected for conformance to overall design specifi cations so that equipment performance is not affected Components that are frequency determined or peculiar to the individual transmitter are identified by a HARRIS part number and MW SB AM BROADCAST TRANSMITTER component number on the final test and addendum sheets shippe...

Страница 164: ... 11 RF DRIVER 1A2A3 992 3819 002 7 17 7 12 RF DRIVER MODULE 992 3820 001 7 18 7 13 FLAG OVERLOAD PC 992 4962 002 7 19 7 14 PA GRID ISO PLATE 992 3821 002 7 21 7 15 AC POWER PANEL 1A4 992 3822 002 7 22 7 16 RELAY OVERLOAD BD 992 4961 001 7 23 7 17 POWER SUPPLY 1A5 992 4032 002 7 24 7 18 LEFT METER PANEL 1A7 992 3825 002 7 25 7 19 DIRECTIONAL COUPLER 992 3826 001 7 26 7 20 RT MRT PANE 992 3827 001 7...

Страница 165: ...OL Table 7 2 XMTR MW5B 5KW 994 8622 001 HARRIS PART NO 374 0074 000 374 0093 000 994 8622 002 DESCRIPTION TUBE 4CX3000A 8169 TUBE 3CX2500F3 MW5B BASIC XMTR 888 2109 010 WARNING Disconnect primary power prior to servicing QTY 1 0 1 0 1 0 UM 7 3 ...

Страница 166: ...0 2 0 1C4 500 0477 000 CAP OlUF 10 2500V 1 0 1C5 504 0383 000 CAP 1500PF 25KV 1 0 1C6 524 0314 000 CAP 50UF 450V 1 0 1C8 504 0383 000 CAP 1500PF 25KV 1 0 lClO 504 0248 000 CAP MICA 750PF 20KV 1 0 1Cll 1C12 516 0402 000 CAP 4800 PF 20KV 2 0 1C14 514 0145 000 CAP VAR 25 500PF 1 0 1C15 510 0706 000 CAP 2 90 UF 20KV 1 0 1Cl6 1C17 516 0207 000 CAP HV 25 UUF 15KV 2 0 1C23 516 0082 000 CAP DISC OlUF lKV ...

Страница 167: ...000 648 0064 000 650 0138 000 DESCRIPTION COIL ASSY MOD MON PI RIBBON TYPE COIL COIL ASSY BClOP RES 100 0 OHM 2W 5 RES 10 0 OHM 2W 5 RES 1 2M OHM 2W 5 RES 10 0K OHM 1 2W 5 RES 50 0 OHM SOW RES 250 0 OHM 275W 10 RES 10 0 OHM 25W METER MULTIPLIER RES 10 0K OHM 2W 5 RES lOK OHM l 2W 1 RES 10 0 OHM 185W RES 12 0K OHM 2W 5 RES 10 0K OHM lW 5 RES 250 0 OHM 275W 10 RES 1 0K OHM 1 2W 5 SW PRESS SW INTLK S...

Страница 168: ...Ll3 fllZl HARRIS PART NO 650 0147 000 815 4279 001 829 1869 001 916 8224 001 928 7002 002 992 6396 001 DESCRIPTION KNOB CRANK FILTER AIR WINDOW COIL ASSEMBLY CABLE ASS Y MAIN PWB HV PROTECTION MWS 10 7 6 888 2109 010 WARNING Disconnect primary power prior to servicing QTY 2 0 1 0 1 0 1 0 1 0 1 UM ...

Страница 169: ...0 614 0090 000 402 0024 000 650 0021 000 929 2033 003 DESCRIPTION PDM PC BOARD PC BD XFMRLESS AND INPUT AUDIO DRIVER PC ASSY MEl LED GREEN LED RED XFMR CTL P8395 ZENER 1N2992A 39V CAP DISC 003UF lKV 20 CAP DISC OlUF lKV GMV CAP 7500PF 500V 5 CAP DISC OlUF lKV GMV CAP 47UF 600V CAP DISC 003UF lKV 20 CAP lSOUF 50V FUSE SLOW CART 1A 250V CHOKE 8 HY Cl722 POT MOTORIZED DUAL POT 2000 OHM 4W RES 3 0K OH...

Страница 170: ...TRANSISTOR D44C9 1 0 RTl 559 0010 000 THERMISTOR 1K OHM 1 0 Rl 540 0075 000 RES 12 0K OHM 1 2W 5 1 0 R2 540 0071 000 RES 8 2K OHM 1 2W 5 1 0 R3 540 0053 000 RES 1 SK OHM 1 2W 5 1 0 R4 540 0047 000 RES 820 0 OHM 1 2W 5 1 0 RS 540 0049 000 RES 1 OK OHM 1 2W 5 1 0 R6 540 0059 000 RES 2 7K OHM l 2W 5 1 0 R7 540 0068 000 RES 6 2K OHM 1 2W 5 1 0 R8 540 0017 000 RES 47 0 OHM 1 2W 5 1 0 R9 540 0066 000 RE...

Страница 171: ...000 540 0936 000 550 0958 000 DESCRIPTION DIODE BRIDGE VM28 DIODE SILICON 1N914 RECTIFIER IN4005 DIODE SILICON 1N914 ZENER 1N4737 7 SV ZENER 1N4744A 15V DIODE SILICON 1N914 DIODE BRIDGE VM28 DIODE SILICON 1N914 CAP DISC 005UF lKV 20 CAP MICA lOOPF 500V 5 CAP lUF 100V 20 CAP MICA lOOPF SOOV 5 CAP MICA 360PF 500V 5 CAP MICA 560PF 300V 5 CAP MICA lOOPF 500V 5 CAP MICA 130PF 500V 5 CAP lUF 100V 20 CAP...

Страница 172: ...5 000 RES 510 0 OHM l 4W 5 1 0 R37 540 0912 000 RES l OK OHM l 4W 5 1 0 R38 550 0626 000 POT lOK OHM SW 10 1 0 R39 540 0904 000 RES 470 0 OHM l 4W 5 1 0 R40 540 0936 000 RES 10 0K OHM l 4W 5 1 0 R41 R42 550 0958 000 POT lOK OHM 1 2 W10 2 0 R43 540 0587 000 RES 100 0 OHM 2W 5 1 0 R44 540 0912 000 RES LOK OHM l 4W 5 1 0 R45 540 0916 000 RES 1 5K OHM l 4W 5 1 0 R46 540 0587 000 RES 100 0 OHM 2W 5 1 0...

Страница 173: ...T DIP 1 0 Tl 472 0713 000 XFMR POWER 1 0 Ul 382 0552 000 IC TL074CN3 1 0 U2 382 0636 000 IC TL071CP3 1 0 U3 382 0711 000 IC AD534 JH 1 0 XKl 404 0214 000 RELAY SOCKET 1 0 XR19 404 0675 000 SOCKET IC 16 CONT 1 0 XU3 404 0303 000 SOCKET IC 10 PIN 1 0 943 3854 001 PC BD AUDIO INPUT PDM 1 0 888 2109 010 7 11 WARNING Disconnect primary power prior to servicing ...

Страница 174: ...AP DISC 05UF 600V 1 0 ClO 516 0082 000 CAP DISC OlUF lKV GMV 1 0 Cll 522 0521 000 CAP lOOUF 150V 1 0 Ql Q2 380 0478 000 TRANSISTOR SVT 350 3 2 0 Rl 540 0001 000 RES 10 0 OHM 1 2W 5 1 0 R2 540 0033 000 RES 220 0 OHM 1 2W 5 1 0 R3 540 0563 000 RES 10 0 OHM 2W 5 1 0 R4 540 0060 000 RES 3 0K OHM l 2W 5 1 0 RS 540 0571 000 RES 22 0 OHM 2W 5 1 0 R6 540 0670 000 RES 300 0K OHM 2W 5 1 0 R7 540 0073 000 RE...

Страница 175: ...2W 5 2 0 R6 R7 540 0025 000 RES 100 0 OHM 1 2W 5 2 0 R8 540 0055 000 RES 1 8K OHM 1 2W 5 1 0 R9 R10 540 0021 000 RES 68 0 OHM 1 2W 5 2 0 Rll 540 0059 000 RES 2 7K OHM 1 2W 5 1 0 R12 Rl3 540 0014 000 RES 36 0 OHM l 2W 5 2 0 R14 540 0066 000 RES 5 lK OHM 1 2W 5 1 0 R15 540 0615 000 RES 1 5K OHM 2W 5 1 0 Rl6 550 0966 000 POT 2K OHM 1 2W 3W 10 1 0 Rl7 540 0035 000 RES 270 0 OHM 1 2W 5 1 0 R18 540 0332...

Страница 176: ...IS PART NO 992 3817 001 992 3819 002 552 0307 000 604 0196 000 614 0090 000 992 4962 002 DESCRIPTION OSCILLATOR RF DRIVER 1A2A3 RHEOSTAT 10 OHM 25W SW INTLK SPDT DOOR TERM BOARD 23 TERM FLAG OVERLOAD PC 7 14 888 2109 010 WARNING Disconnect primary power prior to servicing QTY 1 0 1 0 1 0 1 0 1 0 1 0 UM ...

Страница 177: ...5UH 500 MA 1 0 Ql Q2 Q3 380 0083 000 TRANSISTOR 2N2369 3 0 Q4 380 0204 000 TRANSISTOR D44C9 1 0 Rl 540 0087 000 RES 39 0K OHM l 2W 5 1 0 R2 540 0079 000 RES 18 0K OHM l 2W 5 1 0 R3 540 0015 000 RES 39 0 OHM 1 2W 5 1 0 R4 540 0035 000 RES 270 0 OHM 1 2W 5 1 0 RS 540 0049 000 RES 1 0K OHM 1 2W 5 1 0 R6 540 0065 000 RES 4 7K OHM l 2W 5 1 0 R7 540 0087 000 RES 39 0K OHM l 2W 5 1 0 R8 540 0079 000 RES ...

Страница 178: ...2 Table 7 10 OSCILLATOR 992 3817 001 Continued HARRIS PART NO 404 0306 000 404 0267 000 938 9889 001 DESCRIPTION SOCKET IC 583529 1 SOCKET CRYSTAL PRINTED BOARD 7 16 888 2109 010 WARNING Disconnect primary power prior to servicing QTY 1 0 2 0 1 0 UM ...

Страница 179: ...F2 F3 F4 F5 398 0090 000 FUSE SLOW CART 3A 32V 5 0 Ll 492 0603 000 COIL VAR l 2 5UH 1 0 Rl R2 540 0044 000 RES 620 0 OHM l 2W 5 2 0 R3 542 0049 000 RES 1 0 OHM lOW 1 0 R5 R6 R7 RB 540 0583 000 RES 68 0 OHM 2W 5 4 0 XDS1 XDS2 XDS3 406 0317 000 SOCKET LAMP 7 08 XDS4 XDS5 5 0 XF1 XF2 XF3 XF4 402 0024 000 FUSE HOLDER XF5 5 0 928 6787 001 PRINTED ASSEMBLY 1 0 928 7106 001 CABLE ASSEMBLY 1 0 888 2109 01...

Страница 180: ...LE 992 3820 001 HARRIS PART NO 384 0678 000 500 0883 000 508 0345 000 380 0513 000 540 0716 000 DESCRIPTION DIODE FAST RECOVERY CAP 4700PF 500V 5 CAP 47UF 200V 10 TRANSISTOR RES 10 0 OHM 2W 10 7 18 888 2109 010 WARNING Disconnect primary power prior to servicing QTY 2 0 1 0 2 0 2 0 1 0 UM ...

Страница 181: ...HM 2W 5 2 0 R3 540 0025 000 RES 100 0 OHM 1 2W 5 1 0 R4 540 0606 000 RES 620 0 OHM 2W 5 1 0 R5 540 0053 000 RES 1 5K OHM 1 2W 5 1 0 R6 540 0089 000 RES 47 0K OHM 1 2W 5 1 0 R7 540 0025 000 RES 100 0 OHM l 2W 5 1 0 R8 540 0121 000 RES 1 0M OHM 1 2W 5 1 0 R9 540 0073 000 RES 10 0K OHM 1 2W 5 1 0 RlO 540 0121 000 RES LOM OHM 1 2W 5 1 0 Rll 540 0017 000 RES 47 0 OHM 1 2W 5 1 0 R12 R13 R14 Rl5 540 0611...

Страница 182: ...0 R37 540 0622 000 RES 3 0K OHM 2W 5 1 0 R38 R39 540 0912 000 RES l OK OHM l 4W 5 2 0 R40 540 0090 000 RES 51 0K OHM l 2W 5 1 0 Sl 604 0748 000 SW TGL 2 POS 1 0 Ul 382 0415 000 IC 324 1 0 XFlA XFlB 402 0129 000 CLIP FUSE 2 0 XUl 404 0305 000 SOCKET IC 583527 1 1 0 929 7127 001 PC BD ASSY 1 0 7 20 888 2109 010 WARNING Disconnect primary power prior to servicing ...

Страница 183: ...F 30KV 1 0 C4 516 0206 000 CAP HV 1000 UUF 5000 1 0 C5 C6 516 0509 000 CAP 2 2UF 50V 20 2 0 C7 C8 500 0657 000 CAP 03UF 600VDC 10 2 0 C9 516 0209 000 CAP HV 100 UUF 15KV 1 0 11 928 6796 001 COIL ASSEMBLY 1 0 12 494 0098 000 CHOKE R F 1 MHY 1 0 Ml 632 0888 000 METER 0 300 MADC 1 0 M2 632 1007 000 METER 0 1 5ADC 1 0 Rl R2 R3 542 0303 000 RES 10 0K OHM 100W 3 0 929 0135 001 CAPACITOR MOD 1 0 888 2109...

Страница 184: ...CHING 4 PDT 1 0 K3 570 0120 000 CONTACTOR 40 AMP 1 0 K4 570 0224 000 CONTACTOR 40 AMP 1 0 K5 574 0062 000 RELAY LATCHING 4 PDT 1 0 K6 570 0120 000 CONTACTOR 40 AMP 1 0 Ml 636 0035 000 METER 115V 60HZ 1 0 Rl R2 R3 542 0083 000 RES 2 5K OHM lOW 3 0 R4 552 0430 000 RHEOSTAT 10 OHM 225W 1 0 R5 552 0386 000 RHEO 200 OHM 100W 1 0 R6 R7 R8 542 1010 000 RES 5 5 OHM 155W 3 0 R9 552 0769 000 RHEO 350 OHM 12...

Страница 185: ...000 CAP 400UF 50 VDC 1 0 Kl K2 574 0225 000 RELAY 6VDC 4PDT 2 0 K3 K4 572 0127 000 RELAY 4PDT 24VDC 2 0 Rl 540 0571 000 RES 22 0 OHM 2W 5 1 0 R2 540 0587 000 RES 100 0 OHM 2W 5 1 0 R3 540 0045 000 RES 680 0 OHM 1 2W 5 1 0 TDl 576 0121 000 RELAY DELAY 26N05T 1 0 XK1 XK2 XK3 XK4 404 0214 000 RELAY SOCKET 4 0 XTDl 404 0059 000 SOCKET TUBE 9 PIN 1 0 939 2803 001 PC BOARD 1 0 888 2109 010 7 23 WARNING ...

Страница 186: ...3 000 CAP 16 UF 450V 1 0 11 476 0384 000 CHOKE 1 HY 350MADC 1 0 Rl R2 R3 R4 542 0060 000 RES 100 0 OHM lOW 4 0 R5 R6 540 0060 000 RES 3 0K OHM l 2W 5 2 0 R7 R8 542 0282 000 RES 1 0 OHM 100W 2 0 R9 540 0659 000 RES 100 0K OHM 2W 5 1 0 RlO 542 0170 000 RES 50 0 OHM 25W 1 0 TBl 614 0053 000 TERM BOARD 9 TERM 1 0 Tl 472 0992 000 XFMR LOW VOLTAGE 1 0 T2 472 0954 000 XFMR BIAS 1 0 929 1857 001 CABLE ASS...

Страница 187: ...M 1 2W 5 1 0 R3 540 0057 000 RES 2 2K OHM 1 2W 5 1 0 R4 550 0066 000 POT 7 SK OHM 2W 1 0 RS 540 0065 000 RES 4 7K OHM 1 2W 5 1 0 R6 540 0099 000 RES 120 0K OHM 1 2W 5 1 0 R7 540 0186 000 RES 4 7K OHM 1 2W 5 1 0 RS 550 0065 000 POT SK OHM 2W 10 1 0 Sl S2 S3 S4 S5 604 0445 000 SW PB LESS LENS CAP S6 6 0 500 0783 000 CAP 5100 PF 500V 5 1 0 598 0118 000 LENS CAP SW GREEN 2 0 598 0119 000 LENS CAP SW R...

Страница 188: ...826 000 CAP MICA 120PF 500V 5 LO C9 520 0119 000 CAP VAR 6 7 140PF 1 0 Cll Cl2 500 0837 000 CAP MICA 510PF 500V 5 2 0 Rl 540 0089 000 RES 47 OK OHM 1 2W 5 1 0 R2 550 0073 000 POT 100K OHM 2W 1 0 R3 540 0089 000 RES 47 0K OHM 1 2W 5 1 0 R4 R5 540 0587 000 RES 100 0 OHM 2W 5 2 0 R6 540 0089 000 RES 47 0K OHM l 2W 5 1 0 R7 550 0073 000 POT 100K OHM 2W 1 0 RS 540 0089 000 RES 47 0K OHM 1 2W 5 1 0 R9 5...

Страница 189: ... 6KVDC SCALE 1 0 M2 632 0778 000 METER 0 lOKW SCALE 1 0 Rl 550 0061 000 POT lK OIDI 2W 1 0 R2 548 0181 000 RES 6190 OIDI 5W 1 1 0 R3 548 1204 000 RES 22 6K OIDI l 4W 1 1 0 R4 550 0061 000 POT lK OHM 2W 1 0 Sl 604 0405 000 SW PB BLK SPDT 1 0 S2 914 9494 007 MOD SW CTL 1 0 650 0028 000 KNOB RD SKIRT 1 135 1 0 815 3002 002 GLASS 1 0 928 6897 001 BOARD LED MTG 1 0 888 2109 010 7 27 WARNING Disconnect ...

Страница 190: ...R7 CR8 CR9 CR10 CR11 CR12 7 28 Table 7 21 HV RECTIFIER 992 4036 001 HARRIS PART NO DESCRIPTION 384 0582 000 RECT SILICON EFT 15H20 828 6040 001 BOARD MOUNTING 852 7591 002 SCHEMATIC 888 2109 010 WARNING Disconnect primary power prior to servicing QTY UM 12 0 1 0 0 ...

Страница 191: ...2 000 CAP 2500 UF 15V 1 0 Jl 620 0410 000 JACK BULKHEAD UG 657 U 1 0 Kl 574 0040 000 RELAY DPDT 115VAC 1 0 Rl 542 0167 000 RES 10 0 OHM 25W 1 0 R2 540 0075 000 RES 12 0K OHM l 2W 5 1 0 R3 552 0085 000 RES ADJ 50 OHM SOW 1 0 R4 542 0105 000 RES 25 0K OHM 12W 1 0 TBl 614 0050 000 TERM BOARD 6 TERM 1 0 Tl 472 0993 000 XFMR SCREEN 1 0 888 2109 014 7 29 WARNING Disconnect primary power prior to servici...

Страница 192: ...ULTIPLIER 938 4433 004 REF SYMBOL HARRIS PART NO DESCRIPTION QTY UM Rl R2 R3 R4 R5 548 0373 000 RES 249K OHM l 2W 1 R6 R7 R8 R9 Rl0 Rll R12 Rl3 Rl4 Rl5 Rl6 Rl7 Rl8 Rl9 R20 20 0 7 30 888 2109 010 WARNING Disconnect primary power prior to servicing ...

Страница 193: ...8 1431 000 548 0997 000 548 1398 000 548 1395 000 548 1431 000 548 1455 000 548 1362 000 DESCRIPTION DIODE BRIDGE VM28 ZENER 1N5359A 24V DIODE SILICON 1N914 RECT 1N4002 RECT 1N4001 CAP 470PF 15KVDC CAP lUF 50V DISC CAP lOOUF 50V CAP 33UF 35V 20 CAP DISC 03UF 600V CAP MICA lOOPF 500V 5 CAP lUF lOOV 20 CAP MICA lOOOPF 100V 5 CAP lUF 100V 20 CAP lUF 160V 1 CAP lUF 63V 5 CAP lUF lOOV 20 CAP MICA lOOPF...

Страница 194: ...ES 150 0K OHM l 4W 5 1 0 R044 540 0046 000 RES 750 0 OHM l 2W 5 1 0 R45 540 0936 000 RES 10 0K OHM l 4W 5 1 0 R046 540 0947 000 RES 30 0K OHM l 4W 5 1 0 R047 540 0984 000 RES l OM OHM l 4W 5 1 0 R048 540 0947 000 RES 30 0K OHM l 4W 5 1 0 R049 R050 540 0919 000 RES 2 0K OHM l 4W 5 2 0 R51 540 0936 000 RES 10 0K OHM l 4W 5 1 0 R052 540 0317 000 RES 240 0 OHM lW 5 1 0 R053 540 0936 000 RES 10 0K OHM ...

Страница 195: ...nsmitter Control Circuits Schematic High Voltage Protection Circuitry Wire Running List Sheet 1 of 9 Wire Running List Sheet 2 of 9 Wire Running List Sheet 3 of 9 Wire Running List Sheet 4 of 9 Wire Running List Sheet 5 of 9 Wire Running List Sheet 6 of 9 Wire Running List Sheet 7 of 9 Wire Running List Sheet 8 of 9 Wire Running List Sheet 9 of 9 888 2109 010 Number 852 8726 001 852 7591 002 839 1...

Страница 196: ...eet 2 of 2 8 10 Wire Running List Oscillator and 816 4916 001 8 41 8 42 RF Driver Cable Sheet 1 of 2 8 10 Wire Running List Oscillator and 816 4916 001 8 43 8 44 RF Driver Cable Sheet 2 of 2 8 11 Wire Running List Low Voltage and 816 5020 002 8 45 8 46 Modulator Bias 8 12 Wire Running List All 816 5041 001 8 47 8 48 8 2 888 2109 010 WARNING Disconnect primary power prior to servicing ...

Страница 197: ...8 I 0 R2 RECYCLE I 00 CHASSIS A1 8 N207 I 10 ITT 13 132Tl71 c I CB2 2 TB 3 0 j ii I TBl 2 I TBI o o 7 8 131 76 0 1f1 I C87 C so I HV RUN 8 1 1 lO T4 i f o1c 5 s c 1 g _ 1221 R8 2 HIGH VOUAGE IT SUPPLY L_ TBI 18 350 TBI 5 _ 6 30 F LAMENT ALL RELAYS UNENERGIZED K2 HV OFF ON LATCH RELAY SHO IJN WI lH HV OFF ow 1 h0H rA Hp r TON T84 FOR DUAL TRANSMITTER OPERA Tl ON ONLY MW SA CGNTROL CIRCUITS REMOTE P...

Страница 198: ... 15 2 ALL RESISTORS ARE lN OHMS 4W 5 L ALL CAPACITANCE S IN UF UNLESS OTHERWISE NOTED llo IN c3 aw CR2 C I 100 o8 v 50V fob sov lo b CR 3 8W E6 9 10 CLEAR H 10 12 15 CR6 C5 55V CR7 i5v CR8 15 71 90 130 1CrMNDPAss r h l f_ i K 7 1 K i j 1 K 1 2K 1 t t f2K E7 u 3 5 S l 1 Cl6 r I Rl9 17 OSI 5 a 1 7 3 El Ylf l_J l c 7_J 2W UIO ZI 2 HtGH VOLTAGE TRANSFORMER FAULT INDICATOR 15 t bo 15 15 l8o H m 8 mo E5...

Страница 199: ...O 10 01 10 r 1 INO a J lltP TO 0 01 1 9 so 1 6 INO i l OUClM CI iH 1 CIPlClllHC 1 1 1 1 su c1 oavs I I I I i I I I 10 6 I I I nlrrm nil m llf c 1 1ir r f 1 II _ 1Nl0 1 I 1Hl01 INWh tL 0011 _ r 1 lOV F Rtc cuo ON SI OH 1 l O f __ _ YSlR lRIP S HSlllYI If R 2 n R R14 __ CIU6RIIE 1l toC rl I RHIS ORI IR 1 l Ul1 S UN1 I 91H RWIIE S l O I I I I I I I I I I I I I 1 I I I I I I I I I I I I I I I I I I L ...

Страница 200: ...I uu I IUO O ORIV 1 11 I U l SCttEltlllC 551 IHl 001 CllliPE IC i r114 _IIM 111 S II0 1 0 104 5 I I I r irn 1fO 1R 10 H O E ti 1184 1 110 __J I I I I I r 1 I I I i I 13 ijl w 4 rl o 2 8 1 HV PMT CT CN L_ _ _ _ _ _ _ _ _ _ _ _ I I I I I r l9T I I I I I I I t C6 Cij S J 15 ...

Страница 201: ...OWER Cl 1ODO 15V 9 RIO 68 SIB C1 R9 Rl 1 68 1 JK 1000 15V NEG ADJUST RIG 1K l 4W R18 1K 1W CR5 1N3022 11V 1W OS1 NEG All CAPACITORS 1 WATT MICROFARAOS UNLESS NOTED All RESISTOOS I 1 WATT UNLESS NOTES D COMPONENT MOUNTED ON FRONT PANEL 01 R11 36 SIC CRG 1N914 1N4403 11 Rl 3 R14 JG 5 1K R19 27K 01 1N4401 PC BOARD 991 4474 SlO R21 IK 1W CRB 1N914 03 1N4401 r 0S3 POS R13 17K 04 7 I I I I I I I I I 1N4...

Страница 202: ...GNO 11 l l l l 1 1 1 1 I I I I I I l I 2 3 4 5 6 7 e 0 9 10 ll 2 13 14 15 16 17 1s l19 l20 210221123 Cl 003 C7 01 CG o f _ o C4 gooPFJ _ __ _ Bl POT MOTOR DRIVE 23 I ow 30 r tro OR VER I 992 3815 001 I I I I fo2r F CR2 IN914 fJPF fim14 t f l rh Rl CR7 r l I O IN4736 5K COi 2W f 9 IC kJ SVT 350 3 4r L 4i r r o 2W IAI C9 05 l6k L_ AUX MOD I TO IAIR2 ___ REMOTE POWER ADJUST 1 15 16 I 25W i oK m 7 CRl...

Страница 203: ...RE 3 _ I_A 111 r p C44 q JI ISV w I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I L rs g gRrnrnMmEi7ACG kT FLb 5 tzr5 Ds 1 IRrA Rrs ALENT g ffNifs lot Ni L Cllfo ETEST Kl SHOWN N RELAXED LOW POWER STATE 2 IC OENTIFICATION UI TL074CN3 U2 TL07lCP3 U3 AD534JH NOT ON BOARD PART OF POT MOTOR DRIVE FIGURE 8 4 SCHEMATIC PDM AND AUDIO DRIVER lAl SHEET 2 OF 2 839 6354 001 F ...

Страница 204: ... 000 1lo0 1190 01 6800 1200 1240 500 0846 000 500 0783 000 1250 1290 8200 5100 1300 1340 i 500 0883 000 1350 1390 500 0901 000 4700 1400 1440 6800 t 1450 1490 500 0783 000 500 0882 000 1500 1540 5100 3600 1550 1590 500 0902 000 500 0845 000 1600 1640 3300 2000 TYPE 293 TYPE 292 TYPE 293 TYPE 293 IA3 CIA B Ci9 C20 C21 C22 LB TYPE 291 504 0354 000 504 0265 000 504 0379 000 504 0378 000 942 4978 001 ...

Страница 205: ...3 lA4R6 2 24 1A4R7 2 25 lA4R8 2 26 lA4Kl 4 27 lA4Kl 4 28 lA2TBl 23 I IY i H lBf ft ICABLE Na I C TO WIRE SIZE AND TYPE 8 Black SLrd 110 Grey Strd 114 Blue Strd IF14 Blue Strd EQ JIPMENT TERMINAL lTBl l lTBl 2 lTBl 3 1A4K4 3 1 A4K4 1 7 1T4 01 1T4 03 Cab Gnd Stud lA4CBl l 1A4CB2 1 w 1A4Kf 3 1A4K6 4 1A4Kl 3 lA4Kl 5 lBl 1 l ll lA4R6 l 1A4R7 1 1A4R8 l lA4K4 4 1 A fV4 1A4K4 8 lTJ lASTBl l lA5TBl 1 i FIG...

Страница 206: ... l 1S5A 2 lA4Kl 10 lA4K2B ll lA4Al lO lA4Kt 9 lA4Kl 9 lA4Al 3 lA4K2 1 2 1A4Kl l lA4Kt 8 1A4K2A JQ lAl SlB 6 16 Brown Strd ICABLE NO TO AND TYPE jrERMJNAL EQtJIPMENT lASGnd Stud Cab Gnd Stud lA4Kl 3 lA4Kl 5 lA4CB5 l lA4Kl 10 156 N 0 1S3 N 0 1S4 N 0 lA2Sl N 0 l USl N 0 l B2 l l B2 2 lA4f l 2 lA4Kl 8 1S5B l 1S5B 2 lAIIK2B 12 lA4Al ll lA4K3 2 lA4Al 3 lA4Rl l lA4K2A 12 fA4K5A ll lA4Kl 8 4K2A 6 1A451A l...

Страница 207: ...4 l 1A4CJI 3 lA4CUl 2 1A4CB6 2 1A4CB5 4 1A4cn 7 2 lT2 l lA4R5 3 1A4t fi 2 1TB4 2 lA4S1A s lMSlC 6 1A4S1D_ 6 1A4X58 12 1A4r J l2 116 Brown PMEUT __ crd l A 1 6 lA4Al 12 L u l 13 l t 4 138 l 1A4CB9 l 1 K5B 9 1A4R5 l 1A4R10 l lMRlO 3 1 v stc 6 l V SlD 6 lAl CB4 1 _ trJ 1N CU6 1 lAl C 35 3 1N CB7 l 1 2 3 lTJ H lASTBl 2 lA5TBl 3 l 1 lAllTBl 1 lAllIBl 2 I lA Sl 2 1 A7S1 3 I I 1A7S2 4 1A7S5 1 U7S3 l lA75...

Страница 208: ...2 1 lA4K5A 10 lMKSA 1 0 lN f S 3 lAlTBl 6 1A4 l 1A Jl 1 9 CAElLE 110 TO WIRE SIZE AND TYPE EQUIPMENT TERMINAL 1 16 Broi r _ t rd 1A7S6 1 1A4K4 l 1A4K4 2 1A2TB1 1 lA5TUl 9 1A21 nd Stud 1TB2 3 1TB2 4 lTB2 5 1Tfl2 6 lTB2 i 1 116 Hrown Strd l B2 8 118 Ri d Stra 1R7 2 IH8 fl eJ StrO l fZQ White STrd ftlo Wh lte trJ lAl Tnl 20 1A1 Kl _ L K2A 6 lA2TBl 4 lA2TBl 8 I 1A7DS2 l lA4kSA 9 1A7DS4 l 1A7D53 l lAST...

Страница 209: ...1A1TB1 10 1A1TB1 Gnd Stud lA2TBl 2 lA2 Bl l lA2TBl 5 LUTBl 7 ICABLE NO TO WIRE SIZE AND TYPE EQUIPMENT TERMINAi 20 llhtte Strd lA4Gnd Stud lA4Cnd Stud lA4K3 l lA7DS5 l lAllTBl 6 lA4 R9 l 1R17 1 lAllilil 3 lAllGnd Stud lAlTBl 2l lA7Rl Gnd Lug 1A7R4 l lA7 Rl l lA9 l lA9R3 l lA9Ml lDSl l 1DS2 2 lA2TBl lJ lAlTBl 7 lA2TBl 16 lA2TBl 17 lA2TBl 6 c 1A_ lf 1A7S6 Coax RG196U 1A7S6 Gnd No 20 Whih S trd lA9Sl...

Страница 210: ... 1A7Hl lA7fU 1A7Rl Gnd lug 1R6 Gnd Lull lA7Rl 3 M 1A7S6 It lAYS2 1A9S2B 1A9R4 2 3 ASE1 l V IRE SIZE 1120 1 hlte Strd 20 Whlti Strd ICABLE NO C TO ANO TYPE EQUIPMENT TEflMINAl lA9DS2 l lA9DSl 1 H 7 7R 1 lA7S7B 2 lA7S7A 3 lA7 7A 4 iA7S7B 4 lA7S7A 5 lA7S7B 6 lA7S7ll 7 lA7S7A 7 1A7S7A 8 1A7S7B 8 L 7S7A 10 JA7S7A ll lA7S7B 11 lA7S7A 12 1A7S7B 12 1A7S7A 13 1A7S7B p lA7S7B 5 1A7S7A 6 lA9R4 3 lA9S2B l 1 1...

Страница 211: ... TYPE EQUIPMENT TERMINAL RG 58 Coax Center Conductor 1C24 Shield l 1Jt Gnd RG 196 Coax Center Conductor TA7CR1 Cathode Shield 1A7C3 2 16 Brown Strd Cab Gnd Stud 16 Brown Strd IA4 Grd Stud 20 White 1A2T81 18 20 hite 1A4 Grd Stud 16 Brown 1S6 N O 16 Brown 1A12St C JitO Grav p ro Stud 20 white t 4 Grd Stud 16 Brown fTO 1 Coax RG196U 1A7S6 3 Coax RG 96 1A7S6 Gnd b2Q llllito 1S1 C aoo llllite 2B 12 20 ...

Страница 212: ...M EQUIPMENT TERMINAL Center 1J2 Conductor 1J2 Grd lcABLE NO B TO WIRE SIZE ANO TYPE Interconductor Shld EQUIPMENT TERMINAL Tie Back FIGURE 8 8 WIRE RUNNING LIST SHEET 9 OF 9 816 5242 002 888 2109 010 8 35 8 36 WARNING Disconnect primary power prior to servicing ...

Страница 213: ... WHITE 20 WHITE 20 WHITE 16 BROWN 20 WHITE 20 WHITE 20 WHITE 20 WHITE 20 WHITE 20 WHITE 20 WHITE 20 WHITE EOUIPMEtlT TERMINAL 253 0059 000 S2 2 253 0059 000 S2 5 253 0059 000 OUT OFF 253 0059 000 1A1A2 M 253 0059 000 1A1 AZ N 253 0059 000 OUT OFF 252 0003 000 1A1A2 A 252 0003 000 1A1A2 8 252 0003 000 1A1 AZ I 252 0003 000 1A1A2 J 252 0003 000 1A1 AZ L 252 0003 000 1A1A2 0 252 0003 000 1A1 AZ p 252...

Страница 214: ...2 0003 000 1A1 A2 E 20 HITE 252 0003 000 1A1A2 D 20 HITE 252 0003 000 1A1 A2 F 20 WHITE 252 0003 000 1A1 A1 4 20 WHITE 252 0003 000 1A1 CR1 CATHODE 20 HITE 252 0003 000 1A1A1 6 20 HITE 252 0003 000 1A1R5 2 20 HITE 252 0003 000 1A1 RS 1 20 HITE 252 0003 000 1A1A3 8 20 HITE 252 0003 000 1A1A3 10 20 HITE 252 0003 000 1A1A3 9 20 HITE 252 0003 000 1A1 A4 2 i BELDEN 8451 253 0059 000 1A1A4 TB 1 I 1A1 A4...

Страница 215: ...ll 1BJ 2 3 Ii LL J tl 4 2 0 r i S_jLA 2 lB I 1 I Ir l13XF i J J O 4 d __ _1 JO ICABLE NO TO SIZE AND TYPE EQUIPMENT TERMINAL s A I er JII J f r i I wh t IJ 2AJ I 9 J _ ll J 11 J 111 i A t 5 1 1 ZA I t ll J 112 7 I I IA 111 1 f I IA 1 A 2 I I JAlA 2 IP 211 i I I I I I r J A l A 1 ltl 13 I I II A 4_ t II II II IJ A J IS I I 1 t J I II IA j JI I 7 l 11A i Je Ide 11 J A 19 II i 4 whit stJ JI 2 A J b I...

Страница 216: ... C t u i ICABU NO TO WIRE SIZE AND TYPE EQIJIPMENT TERMINAL J r 19 1 caY_ IA ul3 Al I II J o ti 2 tJ fl io j f l O ii 0 ti J JI io ii JO ti 20 J l o d_fl _A3AI c d 1i1 te Std IA 30 _ II I I JI n I I IA A3 I IL1o A1 l3 i_ IA lA3A1 l A J A AS l I A J_ l3 I I J 1 1 3113 I IJJ J AJA I I A J AS I 1 A t Kn FIGURE 8 10 WIRE RUNNING LIST OSCILLATOR AND RF DRIVER CABLE SHEET 2 OF 2 816 4916 001 888 2109 01...

Страница 217: ... 1 4 JUMPERS 1A5C4 1114 1A5C4 1114 1A5CR2 Anode 1114 1ASCR4 Anode 1114 lA5CRl Anode 1114 IAScrn i notlt f l4 IASCRl Cn_thodc 4 ICABLE NO Tl AND TYPE E JUIPMENT TERMINAL Strd lASTl l lASTl 3 5T2 1 lASfi 6 l l SRS l lASTl 5 lA5R7 2 JA5CS lASLl TP lASCRl Anode 1A5CR3 node 1A5R7 1ASR7 1 1A5R7 1 I lASC s Mom strap lA5T2 l 1A5CR6 Anode lASGR8 Anode 1A5C1 1ASC4 Gnd Stud lA5C3 1A5CR2 4 Gnd Stud 1ASCR2 4 G...

Страница 218: ...lAllCl lAllRl lAllKl lAllKl lAllKl 1AllR3 1AllR3 1 1116 2 1116 3 120 4 1118 5 1120 6 1120 4 1118 5 1118 18 1118 1118 JUMPERS 2 1118 1 1120 1 1120 5 1120 1 1120 1 1120 STRD lAll l 1 lAll l 3 lAllKl 2 lAllCl 1AllR2 2 lAllRl 1 lAllCRl ACl lAllCRl AC2 lAllCl lAllCl lAllRl 1 lAllRl Gnd Lug lAllKl Gnd Lug Buss lAllKl 3 Strd 1AllR3 2 lAllJl Center 1AllR3 Wiper FIGURE 8 12 WIRE RUNNING LIST lAll 816 5041 ...

Страница 219: ...www SteamPoweredRadio Com APPENDIX A DATA 888 2109 010 A 1 Dl ll I n _ _ _ _ __ A 1 ...

Страница 220: ... A 2 This appendix contains the following data pertaining to the HARRIS MW SB AM BROADCAST TRANSMITTER A 2 DATA SHEET 3CX2500F3 8251 4CX3000A 8169 ENGINEERING NEWSLETTER LIFE VS FILAMENT VOLTAGE HARRIS ENGINEERING POWER DISTRIBUTION RECOMMENDATION 888 2109 010 ...

Страница 221: ...late Filament Tranconductancc b 830 ma Eb 3000 v Highest Frcqucnc y for Maximum Ratings MECHANICAL 1 i 48 19 16 8 29 2 0 6 Nom Jax 7T volts 53 26 amperes 23 2 pF 40 2 pF 1 2 pF 20 000 umhos 30 MHz Base J Jounting i axirnum Anode Core and Seal Temperatures Cooling See outline drawing Vertical base down or up 250 C Forced Air iraximum Over all Dimensions Length Does not include filament connectors D...

Страница 222: ...ambient air are tabulated below for operation below 30 MHz Ancide tcr Base Air Fiow1 Sea Leve 10 000 Feet I Diuipation Air flow Preuute 0100 Air Flow Pressurt Or011 watts lnclln Watet 1 ncltu Water 1500 33 6 48 9 2500 66 1 25 96 1 82 Base w Anode Air Flow Sea Level 10 000 Feet A11oae i Oissioat1011 Air Flow Prusure Drop Air flow Prenu1e Otop Watts Inches Watu lncnes WUet 1500 32 6 47 i 9 2500 57 1...

Страница 223: ...4L GR10 1 EAD FILAMENT LEADS DRIVING POWER vs POWER OUTPUT The three chai ts on this page show the relationship of plate efficiency power output and approximate grid driving power at plate voltages of 4000 5000 and 6000 volts These charts show combined grid and bias losses only The driving power and power output figures do not include circuit losses The plate dissipation in watts is indicated by P...

Страница 224: ... 5 S 5 rcr co co co I N 0 I 0 0 400 200 0 I J 0 0 200 0 1000 2000 3000 4000 PLATE VOLTAGE VOLTS EIMAC 3CX2500F3 CONSTANT CURRENT CHARACTERISTICS PLATE CURRENT AMPERES GRID CURRENT AMPERES 5000 10 0 8 0 6 0 4 0 3 0 2 0 1 0 s 2 0 6000 I 0 0 ...

Страница 225: ...ent Thoriated Tungsten Voltage 9 0 0 45 V Current at 9 0 volts 41 5 A Amplification Factor grid to screen 5 5 Frequency for Maximum Ratings CW Direct Interelectrode Capacitance grounded cathode 2 Cin Cout Cgp Direct Interelectrode Capacitance grounded grid 2 Cin Cout Cpk 150 MHz 130 pF 12 5 pF 1 2 pF 61 pF 12 5 pF 0 15 pF 1 Characteristics and operating values are based upOfl performance tests The...

Страница 226: ... values 6000 VOLTS 1000 VOLTS 2 0 AMPERES 3500 WATTS 175 WATTS 50 WATTS 250 C EnlAC SK 1400 series EIMAC SK 1406 Axis vertical base up or down TYPIC AL OPERAT ON Plate Voltage Screen Voltage Grid Voltage Plate Current Screen Current 1 Grid Current 1 _ _ Peak RF Grid Voltage 1 Driving Power 1_ Plate Dissipation Plate Output Power 1 Approximate va u TYPICAL OPERATl ON Plate Voltage Screen Voltage Pe...

Страница 227: ...ired plate current ls obtained are incidental and vary from tube to tube These current variations cause no difficulty so long as the circuit maintains the correct volt age in the presence of the var lat ions in current n the case of Class C Service if grid bias is obtained princip 9lly by means of a grid resistor the resistor must be adjustable to obtain the required bias voltage when the correct ...

Страница 228: ... a substantial percentuge It is good practice to determine the nominal filn ment Oltage for a particular application that wdl not affect the operation of the equipme11t This is done by measuring some important parameter of performance such as plate current power output or distortion while filament voltage is reduced on the 4CX3000A At some point in filament voltage there wi l be a noticeable reduc...

Страница 229: ...capacitance between tube terminals and 8169 4CX3000A w1ring effects To control the actual cap H iti lnce n1lu within the tub is the key component invoh ed the industry nd the 1ilitary Services use a standard test procedure as described in Electronic Industries Association Standard RS 191 This requires the use of specially con structed test fixtures which effectively shield all external tube leads ...

Страница 230: ...557 4 6 2 14 7900 193 04 005 24 51 o 778 0 460 J0 92 0180 4 06 0 025 046 1 150 26 67 41 39 91 89 12 32 I 567 39 55 4 1 I l 60 ____ r DO NOT CONTACT I i 00 NOT CCt TACT 0 0 SCREEN GRID CONTROL GR O FILAMENT ZS s 888 2109 010 l lJBt SAtE MUST IICCITT A flAGE 1ITl1 f U n 1s 0 1 l Rl E l OS TIO I JI t Ull 0005 Ot r ED r 1 A BASE LATE 1 t C C SY 3 l DtA EIMAC CACF 10 a 210 Disconnect orimarv oower orio...

Страница 231: ...CX30 00A IM DISTOR TION VS POWER OUTPU T As function of zero signal plate current Eb 5000 Vohs Ec 2 850 Volts RL l700 Ohms f1 L980 MHz f2 l 982 MHz Ibo JOO mAdc I ho 400 mAdc Ibo 500 mAdc _ 3 9 _ 400 500 I I I I I I I 2000 3000 4000 5000 Power Output PEP Walls 3 r d Order Distortion 5th Order Distortion 6000 7000 co C D n X w 0 0 0 ...

Страница 232: ...S TA NT CU RR EN T CH AR AC TE RI ST IC SSC RE EN VO LTA GE 50 0 VO LTS PLA TE CU RR EN T A MP ER ES SC RE EN CU RR EN T A MP ER ES G R ID CU RR EN T A MP ER ES If _ c 0 4 o 3 _ _ _ _ o 5 8 0 _ 0 2 c z o 1 o i _ _ _ _ _ Lf o 1 I _ 05 _ 02 I 0 I I 200 _ 250 O s 6 2 3 4 PL AT E VO LT AG E KI LO VO LT S 60 5 0 4 0 3 0 2 0 1 0 0 5 CP a 0 1 C X 01 c c c t 0 7 ...

Страница 233: ... __ _ 7 E IM A C 4 C X 3 0 0 0 A T Y P IC A L C O N S T A N T C U R R E N T C H A R A C T E R IS T IC S SC RE EN VO LT AG E 85 0 VO LT S PlA TE CU RR EN T AM PE RE S SC RE EN CU RR EN T AM PE RE S G RI D CU RR EN T AM PE RE S 6 0 0 1 5 0 4 0 02 5 3 0 _ _ _ _ _ _ _ _ _ o 2 0 1 0 0 5 0 1 01 0 6 1 7 3 4 5 PL AT E V O LT A G E K IL O V O LT S 1 0 w M w 0 0 c ...

Страница 234: ...ut or an increase in distortion Operation may safely be at a filament voltage slightly higher than that point at which performance appeared to deteriorate A recheck should be made in 12 to 24 hours to make certain that emission is stable The thoriated tungsten filament or cathode is processed in a hydro carbon atmosphere to form a deep layer of di tungsten carbide on the surface Stable emission is...

Страница 235: ...ent to get the best life service from your EIMAC power tubes the following table has been prepared It is not meant to imply that lower filament voltage will not be satisfactory in some instances SUGGESTED NOMINAL FILAMENT VOLTAGE FOR EXTENDED LIFE IN BROADCAST AND COMNlfNICATION SEi VICE TUBE TYPE 3X2500A3 and F3 3X3000Al and A7 3CX2500A3 and F3 3CX3000Al and A7 3CX10 000A3 Al and A7 3CX15 000A3 6...

Страница 236: ... The regulation of a three phase open delta transformer bank is much poorer 1 than that of a closed delta bank The closed del ta bank is symmetri cal the open delta is not so the regulation in each of the three phases differs widely and the effect of this may be an appreciable line voltage unbalance The regulation of a closed delta is symmetrical on each phase Depending upon the impedances of the ...

Страница 237: ...ne to line HARRIS has adopted the practice of specifying three phase transformers for transmitters of this class with three separate primaries each having appropriate taps to accom modate the several nominal voltages in this range For service in the United States these primaries are connected in Delta For service in those parts of the world in which the power distribution is four wire WYE in the 3...

Страница 238: ...NEUTRAL single phase 210 volts 220 volts 230 volts 240 volts 250 volts LINE TO LINE three phase 364 volts 380 volts 400 volts 415 volts 433 volts In summary either a closed delta or WYE distribution system is satisfactory for HARRIS transmitter 888 2109 010 A 21 A 22 ...

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