d. Adjust all slugs except the rear one for maximum grid current. Reduce MIC CAIN setting as necessary to keep the grid current indication below 1/4 scale. Make no adjustment to rear slug L14 at this time. Return Ml(C GAIN control to minimum setting.
If slugs must be turned more than two turns in either direction, the unit has a defect other than alignment. ‘I’roubleshoot the unit.
Set dial to 150, BAND switch to 7.0, and EXCITER TUNING to 3.6 on the logging ‘ (lower) scale.
Adjust MIC GAIN for 1/4-scale grid current. Tune and load the pa into the dummy load. .Adjust the 7-MHz trirnmers for peak grid current, keeping grid current below 1/4 scale with MIC GAIN control. return MlC GAIN to minimum position.
Set BAND switch to 14.0. dial to 150, and EXCITER TUNING to 6.1 on logging (lower) scale. Adjust MIC GAIN for 1/4-scale grid current. Tune and load pa into dummy 1 load.
Tune rear slug L14 for maximum grid current, keeping the current at 1/4 scale or less with thc MlC GAIN control.
Adjust all 14-MHz trimmers for peak grid current, keeping current below 1/4 scale with MIC GAIN control. Return MIC GAIN control to minimum setting.
Set BAND switch to 21.2, dial to 100, and EXCITER TUNING to 7.6 on logging (lower) scale. Set grid current to 1/4 scale, and tune and load the pa into the dummy load.
Adjust all 21-1\1Hz trimmers for peak grid current, keeping grid currcnt at 1/4 scale or less with the MIC GAIN control. Return the MIC GAIN control to minimum setting.
Set BAND switch to 28A, dial to 100, and EXCITER TUNING to 9.0 on the logging (lower) scale. Set grid currcnt to 1/4 scale with MIC GAIN conlrol, and tune and load the pa into dummy load.
Adjust all 28 MHz trimmers for maximum grid currcnt, keeping grid current at 1/4 scale with the MIC GAIN control. Return ,MIC CAIN to minimum position.
4.6.6 Crystal Oscillator Alignntent
This procedure is a refinement that peaks the oscillator plate circuits in the cenLer of i the 200-kHz tuning range. Turn the tuning dial to 100.
Set BAND switch to 28A. Set EMISSION switch to TUNE. Increase MIC GAIN setting, if necessary, to obtain grid current indication. Adjust EXCITER TUNING control for a peak on the pa grid current meter.
Repeak the (E)28 trimmer in the crystal oscillator plate circuit.
Set the BAND switch to 21.2, and adjust EXCITER TUNING control for peak in grid current.
Repeak the (D)21 trimmer in the oscillator plate circuit.
Repeat this procedure with BAND switch settings of 14.0, 7.0, and 3.6, adjusting crystal oscillator plate circuit trimmers (C)14,.(B)7.0, and (A)3.8 respectively.
4.6.7 VFO Sideband requency Shift Adjusment.
Refer to paragraph 4.5.4 for vfo sidehand frequency shift adjustment procedure.
4.6.8 Carrier Balance (Null) Adjustment
Refer to paragraph 4.6.5 for carrier balance (null) adjustment procedure.
4.6.9 ALC Zero Adjustment
Refer to paragraph 4.5.6 for ALC zero adjustment procedure.
4.6.10 First Mixer Balance Adjustment
Refer to paragraph 4.5.7 for first mixer balance adjustment procedure.
4.6.11 VFO Dial Calibration
Refer to paragraphs 4.5.9 through 4.5.12 for vfo dial calibration and adjustment procedures.
4.6.12 PA Neutralizing
Disconnect the high voltage (800 volts) from the transmitter by removing thc lead at the power supply.