[Drake] R-4B calibrator problem

[Chris Codella, W2PA]

Thanks to everyone who responded.  I finally got around to probing this 
further
Harvey was first (of several) to identify the correct problem.  It was 
indeed C192, which had become quite leaky.  A quick replacement from RS 
(of all places) and it's a happy R-4B, and operator.

73, Chris, W2PA

Harvey Hetland wrote:

> Chris:
>
> Capacitor C192, 1000 uF, is a common failure in the Drake R-4B 
> receiver.  It is a filter capacitor on the output of the half-wave 
> rectifier, D16, of the filament supply and provides the filtered 
> operating voltage for the two 923 flip-flops and the 100 kHz oscillator.
>
> 73, Harvey, N6MM.
>
> ----------------------
>
> Chris Codella, W2PA wrote:
>
>> Have any of you run into this one?
>>
>> Suddenly today the 25kHz calibrator in my R-4B stopped working - but 
>> not entirely.  When turned on, it seems to emit a raspy sounding 
>> signal every 50kHz (instead of a carrier every 25).  Strange.
>>
>> Before digging in, I thought I'd ask here first.
>>
>> Tnx, 73,
>> Chris, W2PA
>>
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>
>
>