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McMartin TBM-4500A, Instruction Manual, Page: 1 / 58

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Summary of Contents for TBM-4500A

Page 1: ...www SteamPoweredRadio Com McMARTIN INDUSTRIES INC 605 Norfh 13th Street Omaha Nebroslca 68102 TBM 4500A FM STEREO MON1 ITOR ...

Page 2: ...f L Into R Channel Separation 21 Measurement of R Into L Channel Separation 21 22 Measurement of Crosstalk Stereo Sub Channel Into Main Channel 22 Measurement of Crosstalk Main Channel Into Stereo Sub Channel 22 23 Measurement of the 38 kHz Suppressed Carrier Without Modulation 23 Measurement of the 38 kHz Suppressed Carrier With Modulation 5kHz to 15kHz 23 Measurement of Distortion of the Left an...

Page 3: ...surement Impedance Level Frequency Response Distortion Monaural Stereo Noise Level Stereo phones output Impedance Level 3 88 108 MHz 75 kHz deviation 1001 mod 100 kHz deviation 1331 mod 50 ohms unbalanced 0 1 to 1 watt SOK ohms 1 to 1 5 volts peak to peak 600 ohms balanced 4 dbm 100 modulation at 400 Hz Less than 1 50 15 000 Hz lOK or greater 7 volts 100 modulation at 400 Hz 30 15 000 Hz 0 S db 0 ...

Page 4: ...ets FCC requirements Accuracy Frequency Response Meter characteristic meets FCC requirements Separation Left into right Right into left 67 kHz into either channel 4 300 ohms 0 30 volts peak to peak 50 100 000 Hz 0 2 db 0 5 6 12 Pilot lamp operates at 6 injection or higher Peak light adjustable to read positive and negative peaks from 50 to 120 modulat ion 0 5 db 30 15 000 Hz 0 5 db 0 5 db 30 75 00...

Page 5: ...o sub channel to main 67 kHz into main or stereo Power Requirements Fuse Ambient Temperature Range Dimensions Width Height Depth Weight Finish 5 Better than 46 db Better than 55 db 46 db or better 46 db or better 66 db or better 105 125 volts AC 50 60 Hz 45 watts 0 5 amp slo blo 10 so C Standard 19 inch rack panel mount 8 inches 14 inches overall 25 pounds McMartin blue and brushed aluminum ...

Page 6: ...r MM 607 1 per unit Peak flasher MM 608 1 per unit Phase inverter MM 609 l per unit db amplifier MM 611 1 per unit 19 kHz amplifier MM 612 1 per unit 19 kHz amplifier doubler MM 613 1 per unit 19 kHz phasing amplifier Q 1 SE 4010 Emitter follower SE 4001 Right channel amplifier 2N2102 Right channel amplifier Q 4 SF 4863A Composite amplifier Q 5 SF 4863A db amplifier Q 6 2N3053 db amplifi er Q 7 SE...

Page 7: ...lator diode D 3 1N3604 Demodulator diode D 4 1N3604 Demodulator diode D 5 1N3606 Voltmeter diode D 6 1N3606 Voltmeter diode D 7 1N3606 Voltmeter diode D 8 BY127 Power rectifier D 9 BY127 Power rectifier Z 1 24V Zener diode Z 2 36V Zener diode Z 3 24V Zener diode Z L 24V Zener diode Z 5 90V Zener diode Z 6 36V Zener diode kSelected in production for optimum performance 7 ...

Page 8: ...dio amplifier Voltage amplifier Audio amplifier AMPLITUDE CORRECTION AMPLIFIER MM 602 SE 4001 SE 4001 Left channel amplifier Right channel amplifier WIDE BAND PLUG IN AUDIO AMPLIFIER MM 603 SE 4001 2N2102 DC METER AMPLIFIER MM 604 SF 4863A SF 4863A Amplifier Amplifier of DC amplifier of DC amplifier WIDE BAND FM DEMODULATOR MM 606 40245 40243 40245 8 Local oscillator Mixer Limiter ...

Page 9: ...LASHER CIRCUIT MM 607 SF 4863A SE 4001 SE 4001 2N3053 SF 4863A 2N2102 2N2102 PHASE SPLITTER MM 608 2N2102 2N2102 2N2102 2N2102 9 Limiter Lirni ter Audio amplifier Audio amplifier RF doubling diode Counter detector Counter detector Isolation amplifier of a Schmitt trigger of a Schmitt trigger Low impedance pulse amplifier DC amplifier Buffer Switching transistor Anode follower Phase splitter Negati...

Page 10: ... 4001 2N2102 19 kHz AMPLIFIER MM 611 SE 4010 SE 4001 SE 4001 Amplifier Amplifier Hi Z amplifier Hi Z amplifier Emitter follower 19 kHz AMPLIFIER DOUBLER MM 612 SE 4001 2N2102 2N2102 Hi Z amplifier 38 kHz pulse amplifier DC relay control 19 kHz PHASING AMPLIFIER MM 613 SE 4001 SE 4001 SE Lf001 10 Hi Z amplifier Hi Z amplifier Emitter follower ...

Page 11: ...the stereo sub channels FM S N and AM S N When the function switch is in the FM S N or AM S N position the signal is automatically de emphasized Also the meter is highly damped in all the db positions With the separation switch in the operate position the meter ballistics conform to the FCC requirements NOTE TiiE VOLTMETER IS PROTECTED AGAINST SEVERE OVERLOAD The level is automatically compensated...

Page 12: ...gative peaks exceed the preset level In addition a polarity switch is provided to measure modulation in both positive and negative directions read only on the modulation meter An indicator light located on the front panel lights when the 19 kHz pilot carrier exceeds 6 main channel modulation thus indicat ing stereo transmission A phasing control located on the front panel allows adjustments of the...

Page 13: ... I I I i I T OTAL I I I I 1179 0 TOTAL oo M T R POK 1 J 1 n t ti RELAY N OT NJ PEAK l L I l I I 15KC LOW PASS FILTER 38 c 151 C t OW FASS CO ITOOL f LTE R MIT R LEFT METER I FUNCTlOlf 1 I I r4 s I SWITCH UT I n A1 RIGHT I n AUt IO RIGHT ll6Ht QC METEII ll lER D C IIE TD 110D AMP METER 8 IC o _ OIWI A NE8ft 9LOOI OIAGJIAM T111t 4500A 7 26 4S6 NONE 1 0 1179 ...

Page 14: ...low suitable for feeding diode D 5 thus charging capacitor C 4 to a peak value This peak value is measured with an extremely high input impedance VTVM type circuit DC meter amplifier MM 604 consists of two FET s in a balanced differential amplifier Modulation meter M 1 is connected between the two source elements Thus the meter sees an extremely low impedance This gives a meter circuit with rapid ...

Page 15: ...es present above 15 kHz The output of filters FL 4 and FL 5 feeds the right and left amplifier modules De emphasis is accomplished by a feedback network in each unit A de emphasis switch is provided in each channel by SW 3 and SW 4 which are located on the rear chassis The left and right audio outputs from the two MM 603 amplifiers are fed to their respective terminal boards marked Hi Z on the rea...

Page 16: ... The 19 kHz pilot carrier voltage across the demodulator diodes will be unbalanced if the phasing is incorrect Switching the function switch from positive phase to negative phase samples the voltage present on each side of the demodulator diodes If the voltage is equal exact zero crossing is achieved This voltage is measured with the 19 kHz phasing amplifier MM 613 A second output from Pin No 5 of...

Page 17: ...per decay The three DC meter amplifiers MM 604 are stabilized by a special balancing circuit and double regulation i n the power supply The power supply is well regulated using a Darlington t ype emitter follower employing t hree transistors and two Zener reference voltage diodes The circuit also functions as a capacity multiplier eliminating any AC ripple in t he power suppl y Several of the plug...

Page 18: ...there is adequate ventilation The unit should not be mounted above high heat producing equipment CAUTION TilE TEMPERATURE SHOULD N OT EXCEED 110 F Connect the AC cord to the 117 volt AC source Connect the RF cable from t he pick up loop to the input jack on the rear of the chassis CAUTION DO NOT EXCEED 1 WATT RF INPUT The TBM 4500A has been thoroughly checked and calibrated prior to shipment and s...

Page 19: ...eviation of the transmitter The center meter will read total peak modulation at all times MONITORIID TOTAL MODULATION Total modulation may be read on the center meter at all times POLARITY SWITCH The switch may be left in either the positive or negative posi tions as the peak flasher automatically will respond to positive and negative peaks PEAK MODULATION ADJUSTMENT This adjusts the overmodulatio...

Page 20: ...nitoring PILOT PHASE ADJUSTMENT OF TRANSMIT I ER The internal 19 and 38 kHz phasing of the monitor must be adjusted before making any phase adjustment in the transmitter Applying equal out of phase signals L R 80 100 Hz to the left and right input of the transmitter Adjust the pilot phase of the transmitter for maxi mum reading on either left or right meter If a good wide band oscillo scope is ava...

Page 21: ...AL TOO LOW FIG 4 EXCESSIVE TIME DELAY 21 FIG 5 TIME DELAY AND AMPLI TUDE ERROR p11 t 1111 jjflr Jf f 1 i I tt flt t1 j t ili H a fil ipJi 11fu11l 6Jl1 Jlfi FIG GA PILOT PHASE ON COMPOS ITE SIGNAL I SEPARATION 20 LOG i I FIG 7 SEPARATION MEASURE MENT WITH SCOPE f A B I I ...

Page 22: ...DE IN MONITOR MEASUREMENT OF R INTO L CHANNEL SEPARATION Modulate the right channel of the transmitter until the right meter reads 9CJ o 80 if SCA is being transmitted The left meter should read near zero The separation can be measured by rotating the separation switch to the left R into L until a reading is ob tained on the left meter This procedure is identical to the mea surement of L into R Re...

Page 23: ...on L R signal may be viewed on scope through the BNC connector on the front panel 3 furn the separation switr h to the left to read the cross talk of the double sidec nd sub carrier into the main channel Refer to Operation of Separation Switch This will be read on left meter 4 Return function switch to the operate position 5 Return separation switch to the operate position NOTE IF POOR CROSSTALK R...

Page 24: ...nnels of the transmitter 2 Remove the 19 kHz pilot carrier 3 Turn the function switch to 38 kHz position 4 Turn the separation switch to the left and read the resid ual 38 kHz carrier on the left meter Refer to Operation of Separation Switch 5 Adjust transmitter for the null of the 38 kHz carrier 6 Return the function switch to operate position 7 Return the separation switch to operate position NO...

Page 25: ...k on the front panel MEASUREMENT OF DISTORTION OF MONAURAL SIGNAL 1 Modulate the transmitter 100 as read on total modulation meter 2 Remove the jumper between the HI Z terminals on the rear terminal board of either the left or right channel 3 Connect a distortion analyzer to the terminals marked GROUND and HI Z 4 The de emphasis switch should be in the IN position when distortion measurements are ...

Page 26: ...n Switch S Return function switch and separation switch to oper ate position MEASUREMENT OF FM SIGNAL TO NOISE RATIO OF THE TRANSMITTER l Remove all modulation from the transmitter 2 Turn the function switch to FM S N position 3 Turu the separation switch to the left and read the FM S N on the left met er Refer to Operation of Seperstion Switch 4 Return the function switch and separation switch to...

Page 27: ...od of time it is recommended that the unit be returned to the factory If proper test equipment is available the following calibra tions may be made CAlITION R 19 MUST BE FULLY CLOCKWISE FOR ALL ADJUSTMENTS CALIBRATION OF THE WIDE BAND FM DEMODULATOR 1 Remove the side plate from MM 606 2 The frequency of the crystal is determined by the formula Crystal Frequency Xf Operating Freq mHz 1000 kHz 2 3 C...

Page 28: ...con necting the antenna to TP B inside of the MM 606 case 3 Adjust the BFO for a beat note of around 200 300 Hertz 4 Connect an audio generator to the input of the trans mitter adjust the generator to 13 586 Hz Accurate calibration depends on the accuracy of this audio fre quency 5 Increase the modulation of the transmitter slowly until the first null is reached Continue increas ing modulation unt...

Page 29: ...5 000 3 8 654 75 000 100 0 8 670 3 8 654 86 550 115 4 10 000 3 8 654 43 275 57 7 5 000 4 11 792 75 000 100 0 6 360 4 11 792 58 950 78 6 5 000 4 11 792 23 550 31 4 2 000 5 14 931 75 000 100 0 5 023 DC METER BALANCE DC BALANCE CALIBRATION MM 604 1 Short circuit the meter terminals and adjust the meter for mechanical zero 2 Remove all input signal 3 Adjust the balance controls located on the top of t...

Page 30: ...te posi tion 2 Adjust potentiometer R 3 for an exact reading of 100 on M 1 3 Frequencies from 50 Hertz to 75 000 Hertz should be checked for flat frequency response The devia tion should not exceed t 0 2 db NOTE THE TOTAL MODULATION METER MAY NOW BE USED FOR ALL REFERENCES CALIBRATION OF THE TOTAL PEAK FLASHER l Turn the composite normal SW l switch to composite input 2 Inject a 400 Hertz signal u...

Page 31: ...peak to peak 0 035V RMS into the composite input jack on the rear of the chassis NOTE THE ACCURACY OF THIS VOLTAGE DETERMINES THE ACCURACY OF THE MONITOR 3 Turn the front panel function switch to pilot injec tion position 4 Tune Ll and L2 for maximum reading on the left meter 5 Adjust R 29 for exactly 10 injection reading as read on the top pilot scale on the left meter 6 Connect a wide band scope...

Page 32: ...FERENCE IN THE RECOVERED L R SIGNAL 1 Modulate the transmitter 100o in the monaural mode as read on the total modulation meter 2 Place a jumper between pin 5 and pin 17 of the MM 602 amplitude correction amplifier 3 Adjust right meter calibration R 52 for a reading of 100 on the right meter 4 Adjust the left meter calibrate potentiometer R 83 for a reading of 1007 on the left meter 5 Remove jumper...

Page 33: ...ame performance is achieved on both channels This completes the Stereo demodula tor calibration MONAURAL CALIBRATION OF LEFT AND RIGHT METER 1 Modulate the transmitter 100 400 Hertz as indicated on the total modulation meter 2 Adjust R 44 for exactly 100 modulation as read on both left and right meter STEREO CALIBRATION OF LEFT AND RIGHT METER 1 Modulate the transmitter 100 Stereo 10 19 kHz pilot ...

Page 34: ...otal modula tion meter reads exactly 100 3 Turn the function switch to L R position 4 Adjust R 26 for exactly 100 modulation as read on the right meter 5 Return switch SW l to normal position CALIBRATION OF THE 38 kHz SUPPRESSED CARRIER 1 Turn Composite Normal switch SW l to composite input position 2 Inject a 38 kHz signal il Hz into the composite input jack on rear chassis until the total modula...

Page 35: ...e rear chassis until the total modulation meter reads 100 10 Turn function switch to L R position 11 Adjust potentiometer R 25 for the reference level as set up on the scope Step 5 12 Inject a 400 Hertz signal in the composite input jack on the rear chassis until the total modulation meter reads 100 13 Turn function switch to L R position 14 Adjust potentiometer R 23 for the reference level as set...

Page 36: ... l to normal position CALIBRATION OF AM NOISE METER 1 Remove internal RF shield 2 Bridge the two capacitors which are located under the RF shield with external 2 mfd capacitors 3 Turn the function switch to RF input level position 4 Inject 60 Hertz signal into the RF input jack until the RF indicates exactly 100 reading on the left meter 5 Measure the exact voltage required to give this 100 read i...

Page 37: ...NTENANCE Cont d FINAL TCYrAL MODULATION CHECK Modulate the transmitter with a known lOCf o modulation The total modulation meter should now read exactly lOCf o This should be verified by using Bessell s function Refer to page 28 37 ...

Page 38: ... supply The voltage should be within 10 of the voltage on the schematic 4 If the voltage differs considerably from the correct voltage this would indicate a defec tive module 5 If a plug in module is found to be defective it is recommended that it be returned to the factory for repair or replacement Spare plug in modules may be purchased from McMARTIN INDUS TRIES INCORPORATED Omaha Nebraska CAUTIO...

Page 39: ...www SteamPoweredRadio Com w M3 PHONE S COMP FUNCT ION OUTP UT 19 38K C I r l I I Ml M2 19 KC PILOT PEAK POLAR ITY PEAK SEPAR ATION OFF POWE R MODU LATIO N INDICA TOR SIN ON ...

Page 40: ...www SteamPoweredRadio Com 40 r u ...

Page 41: ... 1 P P R26 I L f t L4 n ___ _ R30 Q10 _ 1 l R40 R45 f r L3 C57 I 1 W r 1 I L f u J I I L ac _ _ a r CSB I IV JF l r t 4e Jt iJl __ zJ l l 1 Q 2 l r 11 fr wl 1 4 _ r __ Q3 Cs 1 _ v 1 1 t PC v 1 1 6 i _ lt l t I _ I 1 1 J e _ _ ___ R l A A IW 1J ll fll4 I C53 _ I W W _ l L J I _ I L 1 I t i _ e U i T1 R83 R52 FL S R11 R23 FL 4 R28 FL 3 FL 1 R24 L 1 L2 ...

Page 42: ...www SteamPoweredRadio Com I SW j R31 C19 R14 R44 R15 R43 R41 R3 SW2 R2 SW6 R24 R28 R23 R11 R52 T2 R83 T3 Q1 R45 ...

Page 43: ...omponents are guaranteed for a minimum per iod of ninety days from the date of original purchase Transportation charges must be prepaid on equipment re turned for warranty service This warranty does not extend to any of our products which have been subjected to misuse neglect accidents incorrect wiring not our own improper installation or to use in violation of the instructions furnished by us nor...

Page 44: ...trolytic C22 63B l Capacitor 0 022 mf d 4oov metalized paper C23 63B lO Capacitor 0 1 mfd 200V metalized paper C24 60 11 Capacitor 50 mf d 25V electrolytic C25 60 11 Capacitor 50 mfd 25V electrolytic c26 63B 9 Capacitor o 068 2oov metalized paper C27 60 27 Capacitor 20 mfd 16V electrolytic M C28 65 17 Capacitor 910 pfd 5i 5oov dipped mica c29 65 48 Capacitor 7500 pfd 5i 500V dipped mica c30 65 11 ...

Page 45: ...tor 100 mfd 150V electrolytic C58A 60A l Capacitor 40 mfd 150V electrolytic c58B 60A l Capacitor 60 mfd 150V electrolytic c58c 60A l Capacitor 100 mfd 150V electrolytic C58D 60A l Capacitor 80 mfd 150V electrolytic C59 65 17 Capacitor 910 pfd 5i 5oov dipped mica c6o 65 3 Capacitor 24 pfd 5i 500V dipped mica c61 60 20 Capacitor 400 mfd 4ov electrolytic C62 Selected in production c63 65 41 Capacitor...

Page 46: ...stor 820 ohm 5 watt deposited carbon film Resistor 1200 ohm 5 watt deposited carbon film Control lOK ohm 5 2 watt composition carbon Control lOK ohm lC o 2 watt composition carbon Control 2 5K ohm lC fo 2 watt composition carbon Control 2 5K ohm lC fo 2 watt composition carbon Resistor 47K ohm 5 watt deposited carbon film Control lOOK ohm lCI 2 watt composition arbon Control lOK ohm lrfli 2 watt c...

Page 47: ... carbon film R54 50B 128 Resistor 47K ohm 5 watt deposited carbon film R55 54 12 Resistor 12 l K ohm 11 watt metal film R56 50B 120 Resistor 22K ohm 5 watt deposited carbon film R57 54 12 Resistor 12 l K ohm 1 watt metal film R58 50B 102 Resistor 3900 ohm 5 watt deposited carbon film R58A 50B 120 Resistor 22K ohm 5i watt deposited carbon film R58B 50B 172 Resistor 3 3M ohm 5 watt deposited carbon ...

Page 48: ... ohm 5 watt deposited carbon film R78 50B 168 Resistor 2 2M ohm 5 watt deposited carbon film R79 50B 104 Resistor 4700 ohm 5 watt deposited carbon film R80 50B 116 Resistor 15K ohm 5 watt deposited carbon film R81 50B 100 Resistor 3300 ohm 5i watt deposited carbon film R82 50B 104 Resistor 4700 ohm 5 watt deposited carbon film R83 42 3 Control 5K ohm lC fo composition carbon R84 50B 130 Resistor 5...

Page 49: ...n R105 52B 10 Control 18K ohm 5 fo 2 watt composition carbon R106 53E 3 Resistor 750 ohm 1Cl o 10 watt wire wound Rl07 54 1 Resistor lOK ohm l fo t watt metal film R108 54 1 Resistor lOK ohm 1 watt metal film Rl09 54 21 Resistor 4750 ohms 1 watt metal film RllO 54 11 Resistor 40 2K ohms l o watt metal film Rlll 54 10 Resistor 7500 ohms l o l watt metal film R112 50B 144 Resistor 220K ohms 5 o watt...

Page 50: ...NC Coaxial J4 17 56 Jack Phone 3 conductor TBl 15 33 Terminal Board 5 screw TB2 15 33 Terminal Board 5 screw Tl 90 24 Transformer Power T2 91 3 Transformer Output T3 91 3 Transformer Output Ml 70 24 Meter Right Modulation M2 70 23 Meter Left Modulation M3 70 23 Meter Total Modulation Dl 22 5 Diode 1N3604 D2 22 5 Diode 1N3604 D3 22 5 Diode 1N3604 D4 22 5 Diode 1N3604 D5 22 15 Diode 1N3606 D6 22 15 ...

Page 51: ...Lamp Assembly Power Lamp Assembly Composite Switch 2 pole 2 position Polarity Switch 2 pole 2 position Slider Switch DPM De Emphasis Slider Switch DPIYI De Emphasis Function Switch 8 pole 2 11 position 8 section Index Assembly Wafer Sections Separation Switch 6 pole 2 11 position 6 section Index Assembly Wafer Sections On Off Switch SPST Toggle Relay 5000 ohm 67 DST 43C Composite Amplifier Plug in...

Page 52: ...www SteamPoweredRadio Com J ...

Page 53: ...nc OMAHA NEBR TITLE SCHEMATIC PLUG IN AUDIO AMPLIFIER OWN BY t OATE 6 2 66 ENG HEDLUND SCALE NONE APP O t OWG A 1172 4 1 Cl 5uf 25V OR 2N 3242A PIN CONNECTIONS I B 25V 2 INPUT 3 CROSS COUPLING 4 OUTPUT 5 BAL POT 6 7 BAL POT 8 INPUT 9 CROSS COUPLING 10 OUTPUT 11 SHIELD R4 12 IK CD PIN CONNECTIONS I SIG GND 2 e 24v 3 INPUT 4 METER 5 METER 6 7 8 SHIELD R6 IOK D W G t A 1184 i L 4 L l C2 5uf 25V SHIEL...

Page 54: ...220K Rl7 5600 40245 R23 4700 Lc10 I 5uf Q4 R24 22 R25 4700 R38 R20 3300 I W JO tl c12 rs4uf n T t 6411 LJ 3 P P R22 1500 05 02 Cl5 33 IN3604 03 IN3604 c o L R N ir 1 t 64v I M c f t ft 8 5ov IOOKC H 6 LOW PASS i FILTER 50uf 25V 50 uf 2511 Q6 R33 15K TP C AUDIO OUTPUT R 1OK ALL RESt TERS 1 2W 5 MCMARTIN INDUSTRIES INC I ADJUST E XAC TLY FOR 0 35 V RM S OIIAHA N 8R WITH 75KC DEVIATION SCHEMATIC MM 6...

Page 55: ...D 5 B 1222 2 REGULATED B 24V 7 6 TITLE OWN BY ENG M C M a rtin Jnd ut1trics Inc OMAHA NEBR SCHEMATIC PEAK FLASHER OWG B 1222 OWG B 1283 2 R I 150K ___ cs 5uf L SIGNAL GND 2 B 3 INPUT 4 OUTPUT 5 BAL 6 OUTPUT 7 a OUTPUT 8 SHIELD Rl7 21680 1 R4 240K R6 1000 4 R9 4750 1 4 cs 32 64V VALUES SELECTED IN PRODUCTION ALL RESISTORS 5 UNLESS OTHERWISE SPECIFIED 1 MM 608 MCMartin 1 nd µ tries lnc OMAHA NEBR TI...

Page 56: ...9 M C Martin lnd ustries It1c OMAHA NEBR T ITL SCHEMATIC PLUG IN AUDIO OB t rk 2 270 R4 240K OAT 6 2 66 SCALE NONE w A 1396 RII 68K C3 10 SE 400c9100 Q2 R6 IOK 6 14 r BLACK 4 YELLOW 7 GRAY NOTES ALL RESISTORS 5 l 2W UNLESS OTHERWISE SPECIFIED VALUES SELECTED IN PRODUCTION PIN CONNECTIONS I SIG GND 2 B 24V REG 3 19KC INPUT 4 B 5 19KC OUTPUT 6 OUTPUT 7 B 8 SHIELD Tlll E DWG B 1273 SE 4001 03 35V t 5...

Page 57: ... 9IOO rr BLACK NOTES R3 4700 1 6 ORANGE ALL RESISTORS 5 UNLESS OTHERWISE SPECIFlEO VALUES SELECTED II PRODUC f10N 4 YELLOW Q2 RS IOK PIN CONNECTIONS I SIG GND 2 B 24V REG 3 19 KC INPUT 4 B 5 19 KC OUTPUT 6 OUTPUT 7 Bt 8 SHIELD 7 GRAY OWG B 1 274 ORANGE R D J B 36V R8 33K C2 1 10MFD 25V MM 612 M0 lf artin lndustriu Inc OMAHA NEBR Tln E SCHEMATIC 19 KC AMPLIFIER _ DATE 6 20 66 SCALE NONE DWO B 1274 ...

Page 58: ... I I I L 2 CIO Rl6 IOOO Ml O rn i PEAK LIGHT R CTIME DELAY W 1t INOICATOR S REGULAT o 31V REMOTE PEAK LIGHT 0 0 OoO 22K R77 22K RtOHT AUOIO OUT PUT STEREO PHONES OUTPUT J4 Lfl T AUOIO OUT PUT NOTES SIGHAL GNO CHASSIS GND VALUE SELECTED IN PROOUCTION 9 RMS SIGNAt VOt TAOES TAKEN IN 10 POSITION RMS SfGNAL VOLTAGES TAKEN IN MONAURAL MOOE t 20 c J FRONT PANEL FUNCTION OPEN SOCKET PtNS USED FOR TIE POI...

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