[Kenwood] ref: kenwood repair
[email protected]
[email protected]
2004年2月13日 13:29:53 EST
RF output had dropped,about 8watts ,lost drive ,alc. Had some higher output
on 14mc. Was working good night before!
John did the following;
PLL Unit unstable ...
29.5 band VCO had no locked
Replace bad diode to restore VCO
Random resoldering of PD, VCO & Both Carrier Boards
All connector clean with Deoxit
PLL align to spec
Regreased VFO, corrected dial problem and alignment for increase output to
Program
Divider for PLL lock
Set counter unit to reference frequency
Removed IF unit
Resoldered suspect connections
Deoxit connectors
Removed AVR unit
Resolder all suspect connections
adjusted voltages to spec
Coil pack board resolder
Deoxit connectors
All relays cleaned
RF Unit soldered
Deoxit connectors
Linkages greased
Full alignment of radio
Meter lamps replaced
Tube bias set to 60 Mils
Carrier point set to 250hz ...Both sidebands symmetrical as possible
Clean rotary controls & bandswitch
Interior & exterior cleaned
Front glass removed for cleaning
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