Marti Electronics SRPT-30 User Manual Download Page 4

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8/7/2003

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Artwork depicting circuitry in this manual is protected by copyright laws.

Information in this manual is subject to change without notice and does not represent a commitment on the part of Marti
Electronics.

Marti Electronics may make improvements and/or changes in this manual or in the product described herein at any time.

This product could include technical inaccuracies or typographical errors.

PHONE NUMBERS:

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Summary of Contents for SRPT-30

Page 1: ...MARTI ELECTRONICS RPU TRANSMITTER MODELS SRPT 30 SRPT 40A...

Page 2: ...TION To maintain compliance with the FCC s RF exposure guidelines the antenna s used for this transmitter must be installed to provide a separation distance of at least 6 meters from all persons durin...

Page 3: ...s as Marti may obtain from the supplier thereof c This warranty does not apply to equipment which has been altered improperly handled or damaged in any way The Seller is in no event liable for consequ...

Page 4: ...ut notice and does not represent a commitment on the part of Marti Electronics Marti Electronics may make improvements and or changes in this manual or in the product described herein at any time This...

Page 5: ...for all standard and some non standard frequency bands The SRPT 30 40A in some frequency bands may not yet be available during the printing of this manual The manual will be revised as new frequency...

Page 6: ...ion 23 Theory of Operation 31 Drawing 702 124 SRPT 30 40A Functional Block Diagram 34 Drawing 702 117 SRPT 30 40A RF Systems Control 35 Recommended Test Equipment 36 Tools For Alignment 36 SRPT 30 40A...

Page 7: ...7 2003 1 INTRODUCTION See the SPECIFICATIONS ORDERING section for a listing of available frequency ranges and power models SRPT 30 DUAL CHANNEL RPU TRANSMITTER SRPT 40A FREQUENCY AGILE RPU TRANSMITTE...

Page 8: ...receiver provide a remote broadcast link having audio quality not approached by conventional voice communication radio equipment The SRPT 30 40A transmitters operate from 110 120 VAC or 220 240 VAC m...

Page 9: ...Remembers and locks on last frequency during power up Frequency resolution 5 or 6 25 KHz steps 00004 accuracy Most other frequencies 100 Hz steps 00015 accuracy SRPT 30 Only Features Continuous duty o...

Page 10: ...ection and Accuracy SRPT 30 800 models and greater Two frequencies only F1 and F2 determined at time of order must operate within model frequency range and will have an accuracy within 1 00004 for fre...

Page 11: ...d and from model to model Accessory Connector 15 pin D connector for DC power remote control encode line level input Weight Net 8 25 Lbs 3 74 Kg Packed 16 75 Lbs 7 60 Kg Dimensions 11 5in 29 21cm W x...

Page 12: ...W 175 180 MHz 40W 180 185 MHz FCC ID DDE RPU 60W 150S FCC Part 74 Subpart D Emission Designators 25K0F3E 30K0F3E SRPT40A 230 215 250 30 30W 215 250 MHz SRPT40A 250 235 265 30 25W 235 245 MHz 30W 245 2...

Page 13: ...horoughly inspect for concealed damage If damage is discovered stop further unpacking and request immediate inspection by local agent of carrier A written report of the agent s findings with his signa...

Page 14: ...ss than one mile If greater range is needed consider locating the transmitting antenna outside the building at a height necessary to provide a line of sight path to the receiving antenna This may not...

Page 15: ...THAN WHAT IS STATED ON ORDER IT IS THE REPONSIBILITY OF THE PURCHASER TO SWITCH TO THE APPROPRIATE POWER SUPPLY POSITION WARNING DO NOT PLUG INTO AC WITHOUT FIRST KNOWING THE POSITION OF THE AC INPUT...

Page 16: ...f a van and controlled remotely The choice depends upon the type of vehicle and the type of operation anticipated The antenna s are usually mounted on top of the vehicle to provide maximum height Tran...

Page 17: ...this cable is shown in FIG 3A NOTICE WHEN OPERATING THROUGH A CIGARETTE LIGHTER THERE MAY BE A ONE TO TWO VOLT DROP DUE TO THE LENGTH OF INTERNAL VEHICLE WIRING AND THE LARGE AMOUNT OF CURRENT REQUIR...

Page 18: ...cable part number 585 088 Typically the cable is connected to the RACOM 1402 at the Marti facility The customer can also connect up the cable as well Refer to Drawing 702 125 Mobile Antenna Installat...

Page 19: ...8 7 2003 13...

Page 20: ...8 7 2003 14...

Page 21: ...nna to ANTENNA connector on SRPT 30 40A rear panel 3 Plug transmitter into a 3 prong grounded 110 120 or 220 240 VAC outlet WARNING FAILURE TO USE A PROPERLY GROUNDED OUTLET COULD RESULT IN A SAFETY H...

Page 22: ...using an ohmmeter Pressurized line should be checked for several days under pressure before installation on a tower to ensure that there are no leaks in the line or fittings Moisture Proofing Coax Co...

Page 23: ...e transmitter is supplying power to it The VSWR should be less than 1 5 to 1 1 5 1 If the antenna system fails to give the predicted signal strength level the following items should be checked 1 Check...

Page 24: ...one 12 gauge wire for each positive and negative leads and split the stranded ends into three at the connector end ATTENTION FOR 12 15 VOLT EXTERNAL SUPPLY THE OPTIMUM VOLTAGE IS FROM 12 TO 15 VOLTS...

Page 25: ...oltage plug power cord into the AC Receptacle and switch the AC LINE switch to the ON position The AC line fuse is rated at 2 5 amps WARNING DO NOT PLUG INTO AC WITHOUT FIRST KNOWING THE POSITION OF T...

Page 26: ...itch SRPT 40A only Dial in the numbers that represent a frequency channel number or other command using the FREQUENCY SELECT Pushwheel switches Then press and release the EXECUTE switch to send the co...

Page 27: ...set using the MAX PWR pot R74 located on the synthesizer see TUNE UP and ADJUSTMENTS section and the HIGH VSWR LED will flash red at a rate of twice per second When the detected VSWR falls less than...

Page 28: ...an be adjusted to increase or decrease the output power from the MAXIMUM power setting to almost zero Watts TRANSMIT LED When the TRANSMIT STANDBY switch is in the STANDBY position the SRPT 30 40A wil...

Page 29: ...AC INPUT SWITCH LOCATED ON THE SIDE OF THE INTERNAL POWER SUPPLY SEE AC LINE INPUT SELECTION 110 120 VAC OR 220 240 VAC SUB SECTION IN THE CALIBRATION AND ADJUSTMENTS SECTION FOR VERIFICATION AND CHAN...

Page 30: ...ve a switch With a voltmeter measure the voltage on the output of the external supply insuring that it is between 12 and 15 VDC Switch the front panel AC LINE switch to the OFF position The unit shoul...

Page 31: ...CONNECTED TO ANTENNA CONNECTOR Power Up SRPT 30 40A If using AC line turn on SRPT 30 40A by turning on front panel AC LINE switch If using 12 15 Volt or 15 30 Volt external DC supply turn on SRPT 30...

Page 32: ...hesizer SRPT 40A Only The SRPT 40A will always power up on the last frequency it was locked onto before last power down If you re not sure what frequency the SRPT 40A will power up on first make sure...

Page 33: ...frequency that operates within the model bandwidth and is either a standard frequency or is a non standard frequency that falls within 00015 of the requested frequency A standard output frequency is...

Page 34: ...ALL CASES WHEN PERFORMING THESE OPERATIONS THE SRPT 40A MUST BE ON AND THE TOP COVER MUST BE REMOVED WHEN THE OPERATION IS COMPLETE ALWAYS SET THE INTERNAL S1 DIP SWITCHES WITH SWITCHES 1 AND 2 ON AN...

Page 35: ...et the maximum power If this user disables this setting then the RF output power will maintain where last set and tuning of the POWER ADJUST pot will have no effect HiHi VSWR Foldback The default for...

Page 36: ...also disabled In that case only one frequency can ever be transmitted TABLE 1 Control Switch Settings Command CONTROL SETTING DIGIT 7 far left digit DIGIT 6 DIGIT 5 DIGIT 4 DIGIT 3 DIGIT 2 DIGIT 1 far...

Page 37: ...nput pins as low as 7 VDC and still maintain 14 5 volts to the synthesizer and 10 0 volts to the audio and mixer boards Therefore the synthesizer will stay locked during most power surges and excessiv...

Page 38: ...IER board The RF goes through two stages of RF amplification The first stage U2 is a 1 Watt max pre driver It has an input and output transformer T1 and T2 for achieving optimum 50 Ohm matching betwee...

Page 39: ...is treated as a constant and only the output frequency is changed The output frequency is modulated by the injected audio at the input of the VCO The amount of modulation is determined by the Modulat...

Page 40: ...8 7 2003 34...

Page 41: ...8 7 2003 35...

Page 42: ...Signal Generator Marconi Model 2022C Spectrum Analyzer Hewlett Packard Model 8558B Wattmeter 50 ohms impedance Bird Model 43 5 or 50 watt element 100 250 MHz or 400 1000 MHz Bird Automatic Modulation...

Page 43: ...g to 100 modulation ____Set encode frequency to 27 Hz ____Set encode frequency deviation to 600 Hz ____Test 12 15 VDC external supply and low voltage dropout ____Calibrate internal regulator and test...

Page 44: ...ection 110 120 VAC or 220 240 VAC WARNING ON FIRST TIME USAGE WE RECOMMEND THAT THE OPERATOR VERIFIES THAT THE AC INPUT SELECTOR SWITCH IS IN THE POSITION THAT CORRESPONDS TO YOUR AC INPUT REQUIREMENT...

Page 45: ...WER AMPLIFIER board adjust EXTERNAL B ADJUST pot R5 in the direction required to achieve a B reading of 13 0 to 13 5 Volts This voltage should be adjusted with the TRANSMIT STANDBY switch in STANDBY p...

Page 46: ...fully clockwise for maximum power out 2 Turn the front panel knob to FORWARD POWER 3 On the FRONT PANEL CONTROL METER board tweak the FWD PWR pot R48 to correlate the front panel METER using WATTS sca...

Page 47: ...he BNC end of the scope probe to a low frequency counter 6 Adjust R37 on the 800 166 COMPRESSOR AUDIO board so that the frequency counter reads 27 1 Hz 7 Remove scope probe and return ENCODE switch to...

Page 48: ...the TRANSMITTER SYNTHESIZER cover 3 Inject a tone into the transmitter at maximum audio modulation in most cases this is 7 5 KHz at 3 dB compression 4 Adjust pot R63 on the TRANSMITTER SYNTHESIZER whi...

Page 49: ...panel TRANSMIT STANDBY switch in the STANDBY position Wait for SRPT 40A to become locked on frequency 8 Referring to Table 2 Forward and Reverse Power Calibration find the row that lists your model Fo...

Page 50: ...the TRANSMIT STANDBY switch in the TRANSMIT position The output power as indicated by the WATT METER should be close to 0 Watts NOTE THE HIGH VSWR LED MAY BLINK FROM TIME TO TIME BUT SIMPLY IGNORE IT...

Page 51: ...ase the front panel EXECUTE pushbutton switch This command will enable the front panel POWER ADJUST pot 31 Tweak the front panel POWER ADJUST pot fully clockwise to verify that the output power goes t...

Page 52: ...R board tweak the RP CAL pot R17 fully clockwise approximately 20 turns 8 On the SYNTHESIZER tweak the MAX PWR pot R74 fully counter clockwise approximately 20 turns 9 Power up SRPT 40A but leave fron...

Page 53: ...ROL METER board adjust S1 dip switches with switch 1 2 and 4 OFF and switch 3 ON 20 Set the front panel FREQUENCY SELECT pushwheel switches as follows DECIMAL 7 far left digit 1 DECIMAL 6 any number D...

Page 54: ...S1 dip switches with switch 1 3 and 4 OFF and switch 2 ON 32 Set the front panel FREQUENCY SELECT pushwheel switches as follows DECIMAL 7 far left digit 1 DECIMAL 6 1 DECIMAL 5 0 DECIMAL 4 0 DECIMAL...

Page 55: ...and 3 and 4 OFF This places the SRPT 40A back into normal operation TABLE 2 Forward and Reverse Power Calibration MODEL CAL FREQUENCY MHz FWD CAL PWR LEVEL W REV CAL PWR LEVEL W SRPT40A 150 175 0000 6...

Page 56: ...8 7 2003 50...

Page 57: ...8 7 2003 51 SRPT 30 40A BILL OF MATERIAL AND SCHEMATICS...

Page 58: ...Cord Black Detachable Power Dynamics 10088 A 580 116 1 Box STL 10 R 10 CR 10 RPT 30 SCD SCG 10 600 041 1 40A only SRPT 40A xxx 705 ST40A xx 1 30 only SRPT 30 xxx 705 ST30 xx 1 KIT BINDER MANUAL SRPT...

Page 59: ...S nickel plated 500 022 2 Lockwasher 4 internal tooth small pattern zinc plated 500 055 4 Washer Switchcraft S1790 1 500 123 1 Flat Washer Micro Plastics FW250 062 nylon 500 164 1 Screw 4 40 x 1 4 ph...

Page 60: ...Pin Single Row Housing Molex M0L50 57 9004 550 229 2 Wire UL1061 22 7 OTC Black 580 040 1 Wire UL1061 22 7 OTC White Violet 580 058 0 Wire UL1061 22 7 OTC Yellow Violet 580 061 0 Cable Assembly w 2 co...

Page 61: ...nd yy SRPT40A xxx 1 10 03 CABLE RF OUTPUT SRPT 40A SBCM 949 0365 1 Cover Gasket 2 4 CH DSTL Drawing A1D4040 REV 2 DB65112 0 xx x 15 0 23 0 25 0 33 0 45 0 or 95 0 depending on model frequency band yy 2...

Page 62: ...4 FILLER REAR SRPT 30 471 5385 1 PANEL BACK SRPT 30 471 5386 1 PANEL TOP COVER SRPT 30 471 5387 1 PANEL BOTTOM COVER SRPT 30 471 5388 1 PARTITION SRPT 30 471 5389 1 Screw 4 40 x 1 4 phillips pan head...

Page 63: ...eholder 586 194 1 Cable Assembly AC Connector to Ground 586 195 1 CABLE ASSEMBLY SRPT 30 40A MN HRNS SBCM 586 211 1 Cover Two Stage Power Amplifier 700 226 61 1 FRONT PANEL SRPT 30 700 250 44 1 SRPT 4...

Page 64: ...ON PART NUMBER QTY INSTRUCTION MANUAL SRPT30 40A REV1 566 035 1 1 MAN COVER MARTI REAR 597 9996 1 MAN COVER MARTI FRONT W WINDOW 597 9997 1 BINDER MARTI 1 IN BLUE W CD POCKET 598 0013 1 xx x 15 0 23 0...

Page 65: ...PTION PART NUMBER QTY Connector UG 58A U N panel receptacle Amphenol 8297 550 037 1 Connector UG 177 U UHF hood Amphenol 83 765 550 057 1 CBL COAX RG316 U 50 OHM 621 1359 0 xx x 15 0 23 0 25 0 33 0 45...

Page 66: ...052 1 Wire UL1061 22 7 OTC White Brown 580 055 2 Wire UL1061 22 7 OTC White Slate 580 056 3 Wire UL1061 22 7 OTC White Violet 580 058 2 Wire UL1061 22 7 OTC Yellow Blue 580 059 2 Wire UL1429 22 7 OS 1...

Page 67: ...10 30 02 SYMBOL DESCRIPTION PART NUMBER QTY Terminal NICHIFU TMDN 125 250 03FA TERMINAL 512 020 2 Wire Stranded UL1015 20 10 Black Tinned Copper 580 130 0 xx x 15 0 23 0 25 0 33 0 45 0 or 95 0 dependi...

Page 68: ...CRIPTION PART NUMBER QTY Solder Lug 4 short Concord 707 1204 512 018 1 Terminal NICHIFU TMDN 125 250 03FA TERMINAL 512 020 1 Wire Stranded UL1015 20 10 Black Tinned Copper 580 130 0 xx x 15 0 23 0 25...

Page 69: ...43 1 L1 INDUCTOR SMT POWER 10UH 350 103P 1 L2 Inductor SMT 1812 82nH Coilcraft 1812SMS 82NJ 350 201 1 P1 Connector 2 dual pin header cut from 550 316 550 191 1 P3 Conn 16 Pin cut from 550 325 Right An...

Page 70: ...itor electrolytic 22uF 25V Mepco 3073BA220T025JPA 219 200 2 C34 C37 Cap monolithic 1000pf 50v 5 KemetC1206C102J5GACTR marked 270 102 4 IC1 IC2 Integrated Circuit Signetics NE5532AN Phillips 405 532 2...

Page 71: ...31VQ403 100 143 1 R31 R32 Resistor 22 1k ohm 1 4 watt 1 metal film Mepco SFR25 145 223 2 R33 Resistor 5 6k ohm 1 4 watt 5 metal film Mepco SFR25 145 562 1 S1 Switch side action slide DPDT Ark Les S 90...

Page 72: ...240HGUE 215 242 1 R43 Resistor 1k ohm 1 4 watt 1 metal film Mepco SFR55 1K 1 TR 145 102 1 R46 Resistor 15k ohm 1 4 watt 1 metal film Mepco SFR25 145 153 1 R48 Resistor 4 75K ohm 1 4 watt 1 metal film...

Page 73: ...r 0039 mfd 2 5 polypro Seacor PFWAB390HGNE 215 392 1 C27 Cap 47pF 5 200V ceramic dipped Kemet C317C470J2G5CA 255 470C 1 C28 Capacitor 01 mf 50v GMV disc Jetcon F7Z5U1C103Z TR 217 104 1 C29 Capacitor 4...

Page 74: ...meg ohm 1 4 watt 5 metal film Mepco SFR25 145 106 1 R30 Resistor 8 2 meg ohm 1 4 watt 5 carbon film 29SJ250 145 825 1 R31 Resistor 221k ohm 1 4 watt 1 RN55D2213F 145 224 1 1 R32 Resistor 22 1k ohm 1...

Page 75: ...e CRCW1206 1K 185 102 1 R34 R37 Resistor SMT Size 1206 475 ohms Dale CRCW1206 475 185 475 4 R38 R41 Resistor SMT size 1206 182 ohms Dale CRCW1206 182 185 182 4 R42 R43 Resistor SMT size 1206 68 1 ohms...

Page 76: ...W1206 4 75K 185 4 75K 1 R28 R32 Resistor SMT 1206 4 75K Dale CRCW1206 4 75K 185 4 75K 5 R33 Resistor 1K ohm 1 8 watt 1 chip Dale CRCW1206 1K 185 102 1 R34 R37 Resistor SMT Size 1206 475 ohms Dale CRCW...

Page 77: ...size 1206 182 ohms Dale CRCW1206 182 185 182 4 R42 R43 Resistor SMT size 1206 68 1 ohms Dale CRCW1206 68 1 185 68 1 2 R44 Resistor SMT size 1206 392 ohms Dale CRCW1206 392 185 392 1 R45 Resistor SMT...

Page 78: ...R37 Resistor SMT Size 1206 475 ohms Dale CRCW1206 475 185 475 4 R38 R41 Resistor SMT size 1206 182 ohms Dale CRCW1206 182 185 182 4 R42 R43 Resistor SMT size 1206 68 1 ohms Dale CRCW1206 68 1 185 68...

Page 79: ...7 C9 Cap monolithic chip 22 pf 50v 5 KEMET C1206C220J5GACTR 270 220 3 J4 Connector D Sub 15 pin angle Keltron DNR 15PJL SG 550 170 1 L1 L2 Inductor SMT Power 0 68 Coilcraft DO3316P 681HC 350 196 2 L3...

Page 80: ...VERSION 2 800 375ATSW2 1 150 MHz Band Model U6 IC VCO 135 185 MHz 400 185 1 230 and 250 MHz Band Models U6 IC VCO 215 265 MHz 400 265 1 330 MHz Band Model U6 IC VCO 300 350 MHz 400 351 1 450 MHz Band...

Page 81: ...m SMT Size D 100uF 16V Kemet T491X107K016AS 298 107 2 C24 Cap SMT 1mF 16V Tantalum Kemet T491A105M016AS 298 105 1 C25 Cap Monolithic chip 10000pF 10 XR7 Kemet C1206C103J5RACTR 270 103 1 C26 Capacitor...

Page 82: ...ale CRCW1206 10K 185 103 1 R11 Resistor SMT 1206 4 75K Dale CRCW1206 4 75K 185 4 75K 1 R13 Resistor 10K ohm 1 8 watt 1 chip Dale CRCW1206 10K 185 103 1 R14 Resistor SMT size 1206 432 ohms Dale CRCW120...

Page 83: ...Potentiometer 5K ohms SMT Bourns 3224W 1 502E 108 502 1 R75 Resistor 1K ohm 1 8 watt 1 chip Dale CRCW1206 1K 185 102 1 R76 Resistor SMT 1206 22 1K Dale CRCW1206 22 1K 185 22 1K 1 R77 Resistor 10K ohm...

Page 84: ...tional LM338T 401 338 3 150 MHz Band 30W Model C35 C37 Capacitor SMT 18 pF 100V 270 180 1 3 D1 D2 Not Used L8 Inductor SMT 1812 56 nH 350 200 1 L9 L10 Inductor SMT 1812 82 nH 350 201 2 L11 Inductor SM...

Page 85: ...MODULE 300 350 MHZ 30W 457 729 1 450 MHz Band 30W Model C35 C37 Capacitor SMT 4 7 pF 100V 270 407 1 3 D1 D2 Not Used L8 Inductor SMT 1206 12 5 nH 350 192 1 L9 L10 Inductor SMT 1206 18 5 nH 350 194 2...

Page 86: ...or SMT 1206 8 nH 350 199 2 L11 Inductor SMT 1206 5 nH 350 198 1 R1 Resistor SMT 2512 51 ohm 1 Watt 184 510 1 R11 Resistor SMT 1206 22 1K 185 22 1k 1 U3 IC PA MODULE 935 965 MHZ 20W 467 760 1 xx x 15 0...

Page 87: ...298 336 1 C30 Cap monolithic 1000pf 50v 5 KemetC1206C102J5GACTR marked 270 102 1 C31 Cap Tantalum SMT Size D 100uF 16V Kemet T491X107K016AS 298 107 1 C32 C34 Cap monolithic 1000pf 50v 5 KemetC1206C10...

Page 88: ...5 103 1 R25 Resistor SMT 1206 4 75K Dale CRCW1206 4 75K 185 4 75K 1 R27 Resistor SMT Size 1206 475 ohms Dale CRCW1206 475 185 475 1 R28 Resistor SMT size 1206 1 21K ohms Dale CRCW1206 1 21K 185 1 21K...

Page 89: ...RT NUMBER QTY Thermistor Fenwal 142 102 FAG RB1 1000 OHM 25C 10 120 002 1 Terminal vinyl insulated C10 10 stud 10 12 wire 512 002 1 Hysol Epoxi Patch Kit 11C Black 900 019 0 xx x 15 0 23 0 25 0 33 0 4...

Page 90: ...r Cord Black Detachable Power Dynamics 10088 A 580 116 1 Box STL 10 R 10 CR 10 RPT 30 SCD SCG 10 600 041 1 40A only SRPT 40A 450 TSL 705 ST40AT 4 1 30 only SRPT 30 450 TSL 705 ST30T 4 1 KIT BINDER MAN...

Page 91: ...M S nickel plated 500 022 2 Lockwasher 4 internal tooth small pattern zinc plated 500 055 4 Washer Switchcraft S1790 1 500 123 1 Flat Washer Micro Plastics FW250 062 nylon 500 164 1 Screw 4 40 x 1 4 p...

Page 92: ...Single Row Housing Molex M0L50 57 9004 550 229 2 Wire UL1061 22 7 OTC Black 580 040 1 Wire UL1061 22 7 OTC White Violet 580 058 0 Wire UL1061 22 7 OTC Yellow Violet 580 061 0 Cable Assembly w 2 conn...

Page 93: ...yy SRPT40A 450 TSL 5 2 03 CABLE RF OUTPUT SRPT 40A SBCM 949 0365 1 Cover Gasket 2 4 CH DSTL Drawing A1D4040 REV 2 DB65112 0 xx x 15 0 23 0 25 0 33 0 45 0 or 95 0 depending on model frequency band yy...

Page 94: ...4 FILLER REAR SRPT 30 471 5385 1 PANEL BACK SRPT 30 471 5386 1 PANEL TOP COVER SRPT 30 471 5387 1 PANEL BOTTOM COVER SRPT 30 471 5388 1 PARTITION SRPT 30 471 5389 1 Screw 4 40 x 1 4 phillips pan head...

Page 95: ...lder 586 194 1 Cable Assembly AC Connector to Ground 586 195 1 CABLE ASSEMBLY SRPT 30 40A MN HRNS SBCM 586 211 1 Cover Two Stage Power Amplifier 700 226 61 1 FRONT PANEL SRPT 30 700 250 44 1 SRPT30 40...

Page 96: ...1 C23 Capacitor 022 mfd 2 5 100v polypro Seacor 215 223 1 R43 Resistor 1k ohm 1 4 watt 1 metal film Mepco SFR55 1K 1 TR 145 102 1 R46 Resistor 8 25k ohm 1 4 watt 1 metal film 145 822 1 R48 RES 1 OHM 1...

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