[Collins] 30L-1 Repair

Tom url4603rd at comcast.net
Thu Jul 3 17:30:01 EDT 2014


Hi All,

     Posted here before about this but have a follow up question.

     I've been told that the problem is not the tuned input ckt. but the 
811 tubes. I fully admit that I'm not an expert on RF Amps, BUT it has 
good output on all bands except 20M. The tuned input on 20M will not go 
below 4 or 5 : 1 , all other inputs go to 1:1.  I kind of think that if 
the problem is isolated to just the 20M tuned input that the logical 
"suspect" is one of the caps in the tuned input ckt. or am I incorrect 
and the 811's are the suspect?  I "do realize" that the 811's are easier 
to change out, but it still doesn't compute in my ole brain.

      Thanks for everyone's feedback on this.

Tom W1ALZ


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