Страница 1: ......
Страница 2: ...ODIAL 3 5 TUNING PROCEDURE 3 6 BIAS ADJUSTMENT 3 7 3 8 SPECIFICATIONS l 3 INSTALLATION UNPACKING LOCATION MOBILE INSTALLATION POWER REQUIREMENTS MOUNTING ANTENNA SPEAKER MICROPHONE STATIONARY INSTALLA...
Страница 3: ...CIRCUITRY MAINTENANCE SERVICE DATA TOP COVER REMOVAL BOTTOM COVER REMOVAL TUBE REPLACEMENT TROUBLE SHOOTING TEST EQUIPMENT ALIGNMENT PROCEDURES CRYSTAL CALIBRATOR 9 0 MHz OSCILLATOR INJECTION CRYSTAL...
Страница 4: ...STATIONARY INSTALLATION CONNECTING THE AC 4 POWER SUPPLY AND MS 4 SPEAKER CONNECTING THE AC 4 POWER SUPPLY RV 4C REMOTE VFO AND A LINEAR AMPLIFIER CONNECTING THE AC 4 POWER SUPPLY AND THE L 4B LINEAR...
Страница 5: ...filters for sideband selec tion Available accessories include an RV 4C Remote VFO a matching MS 4 Speaker an FF 1 Fixed Frequency Adapter a 34 PNB Noise Blanker 1 2 MANUAL COVERAGE This manual provid...
Страница 6: ......
Страница 7: ...rom the same transformer Maximum ripple must be less than l 4 45 to 65 Volts DC adjustable filtered bias into 33 K Ohm load 12 6 Volts AC or DC at 5 5 Amperes Antenna Impedance Nominal 52 Ohms VSWR le...
Страница 8: ...is on the passenger side of the firewall Refer to figure 2 3 for the electrical connections required 2 5 MOUNTING Mount the TR 4C in a con venient location below the dash with an R L Drake Model MMK 3...
Страница 9: ...d to fit inside the MS 4 speaker cabinet 2 l 2 ACCESSORIES Refer to figures 2 6 through 2 9 for the electrical connections required to operate the TR 4C with the various recommended accessories NOTE I...
Страница 10: ......
Страница 11: ......
Страница 12: ......
Страница 13: ......
Страница 14: ......
Страница 15: ...gnal which falls within the 10 kHz wide crystal filter in the noise blanker and outside the 2 1 kHz crystal filter in the TR 4C will operate the noise blanker gate circuit causing distortion products...
Страница 16: ......
Страница 17: ...uency setting for complete operating frequency VFO control Adjusts frequency setting of dial 7 9 IO 11 12 13 14 15 16 VFO indicator lamp Glows only when TR 4C VFO is operating BLANKER switch Provides...
Страница 18: ...Rear Chassis Refer to figure 2 2 Ground terminal Provides a connection for earth ground _ SIDE TONE control Adjusts the level of the CW sidetone with respect to the received signal For no sidetone rot...
Страница 19: ...nd on the line volt age antenna match tube condition etc Increasing the setting of the LOAD control beyond the point at which maximum RF output occurs will result in excessive plate dissipation It sho...
Страница 20: ...n the key is released for a brief period If this period is too long decrease the VOX gain Manual transmit receive swi t thing can be accomplished by connecting an external switch to the push to talk c...
Страница 21: ...will not prevent over drive on AM since the AGC does not function in this mode 3 13 NOVICE OPERATION If used on the novice bands with crystal control or VFO control maximum legal input power is 75 Wat...
Страница 22: ...propriate coil Ll are switched into the crystal oscillator circuit The output from the oscillator is coupled into the pre mixer pentode where it heterodynes with the 4 9 5 5 MHz VFO to produce an outp...
Страница 23: ...ectified by the anti VOX rectifier D6 which supplies negative voltage to the grid of V19B and preventing it from conducting and closing the relay when up audio from the speaker the microphone picks Cu...
Страница 24: ...een modulator V14 is inserted in series with the final amplifier screen supply and a constant voltage is applied to the balanced modula tor Relay K2 shifts the 9 MHz oscillator to 9 001 on transmit ju...
Страница 25: ......
Страница 26: ...the exception of V8 V9 and Vl0 0 tubes can be replaced without need for realignment These tubes are to be replaced with a matched set of the same brand as originally supplied If a different brand is u...
Страница 27: ...rol until noise is audible in the speaker d While switching the SIDEBAND knob back and forth adjust Cl 30 located on top of the chassis near the rear edge until the pitch of the noise is the same on b...
Страница 28: ...K 500 K 3 3 K N C 0 110K 450K 820 1 5 Meg 7 8 K Inf 0 NOTE All measurements were made with respect to ground with the power supply disconnected from the TR 4C The BAND switch was on 7 0 MHz the Mode s...
Страница 29: ......
Страница 30: ...r plug was in the noise blanker jack 5 13 RECEIVER IF a Peak the RF TUNE control on noise at 3 8 MHz b Adjust Tl 1 top and bottom and T12 top and bottom for maximum noise from the speaker 5 14 BALANCE...
Страница 31: ...icator between the TR 4C and the dummy load If no external output indicator is available the TR 4C s own RF output indicator may be used b Tune up the TR 4C on 29 0 MHz for maximum C d power output in...
Страница 32: ...gulator Ql 2N5950 VFO VFO Q2 2N3563 VFO Buffer VFO Buffer Q3 AT5059 Neon Driver Neon Driver Q4 2N3394 VFO Shut tiff VFO Shut Off Q5 2N3877 Audio Pre Amp I Dl IN541 Balanced Modulator D2 IN541 Balanced...
Страница 33: ......
Страница 34: ......
Страница 35: ......
Страница 36: ......
Страница 37: ......
