[Amps] Henry 2KD-5 120 Hz Hum

[R L Measures]

On Aug 6, 2006, at 2:09 PM, Tom W8JI wrote:

>
>> It could be 60 Hz.  It sounds like 120 though.   A local
>> ham with
>> band scope said 60 Hz and not a perfect sine wave.  He
>> said it was
>> riding on the signal about 20 dB down.  This is an amp I
>> acquired
>> recently and the hum problem has existed since I started
>> using it.
>
> Sounds like a filament balance problem to me.

Agreed.  The 2KD-5 has seriesed filaments.
>
> 73 Tom
>
>
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R L MEASURES, AG6K. 805-386-3734
r at somis.org