Check-out and alignment form:
PA protection for the CX7:
High S.W.R. Protection for Transceivers and Amplifiers, CQ, May, 1980, 63-65.
Screen-grid overload protection. download pdf
Power supply IC update.
LM380 or LM384 audio output.
High SWR protection. download pdf
LED counter update.
IEC AC power connector and filter.
Line varistor protection; (3) V130LA10A.
Heat sink for power supply regulators.
QRP power control.
Automatic cooling fan.
CW filter amplifiers.
31 MHz injection passband.
40 MHz passband.
IF gain adjustment; reduces AGC noise.
Sidetone level control minimum.
Spot level control minimum.
A-B spot level vs. A/T.O. spot level equalization.
PTO B shift on dual receive.
Counter input level modification to reduce frequency shift in dual
Mike preamp for Heil mikes.
Patch cable routing modification to reduce hum.
Carrier oscillator adjustment.
Front end AGC adjustment.
Separate +15 regulator for AGC; eliminates AGC noise.
Semi-QSK, using VOX circuits.
PA filament switch.
Connectors on PTOs; simplifies servicing.
+5 volt supply from filament winding; especially for LED counters.
Front panel sidetone level.
Positive PTT and KEY lines; for compatibility with other station gear.
Filter capacitor replacements.
W104 factory error.
Surgistor: see check-out form.
8072 test adapter for TV7-D.
Test jigs for testing boards out of radio.
PA tuning; see check-out form.