[Kenwood] TS-700SP technical question

2003年1月07日 07:03:16 -0800

I've been doing additional troubleshooting the front-end problem in my 
TS-700SP...but have not found any information regarding typical 
operating voltage values for the varicap diodes in the tuned-circuit 
between the RF amp and mixer (query posted previously).
I have noted one other possible varicap related problem: I believe that 
when one adjusts the drive control in the transmit mode that the power 
output should peak as the circuits associated with the varicap diodes in 
the intermediate transmit stages are tuned through resonance. In my 
'700SP there is *no* resonance peak whatever, pointing to a possible 
problem with the resistive voltage divider network and/or varicap diodes 
in the transmit stages.
Does anyone on the list have any thoughts about this phenomenon? I'd 
sure like to get this one sorted out in time for the January VHF 
Sweepstakes!
Tahnks and 73,
Jack, W7PW