>
>Pete Smith wrote:
>> >Replace C-32.
>> /// snip//
>> The coupling capacitor from the input circuit to the cathodes? Well, it
>> sure would be easier than dismantling the input circuit. Have you
>> personally seen this particular failure?
>>
>> 73, Pete Smith N4ZR
>> n4zr@contesting.com
>-----------
>Hi Pete,
>I have seen it 3 or 4 times. The first time was in 1977 shortly after I
>started work as the ham radio tech at the Heathkit store here in Dallas.
? What was the failure mode for the kaput cathode coupling capacitors?
>The amp was a "warrenty" return and I spent entirely too much time
>trying to find the problem...Benton Harbor was no help. I finally
>mentioned it on one of the local repeaters and someone broke in and told
>me exactly which part to replace. The owner got his amp back the next
>morning and I sent a note to Benton Harbor about it...dont know if it
>ever got published as a "tech note"as I was not at Heathkit very long
>before going to IcomEast.
>Since then, I've seen it in 2 or 3 other amps including the one Ive been
>using for the last 20 years. I hope the cap is the problem in your amp
>as its a 15 minute job to replace it and several hours to get to the
>input circuitry.
? Accessing the tuned inputs requires removing the front panel. For a
SB-220 this should take no more than ten minutes.
- cheers, Bob
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
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