SB 200 Power Output

[Ed Richards]

John;

What do you mean by power out being 400 watts DC ? There is no such
thing. Power out is measured in RF; power in is measured in DC. Perhaps
you are measuring it wrong.

Ed Richards

On Mon, 12 Feb 2001 14:16:20 EST John Barkow <KD6PT at AOL.COM> writes:
> High Gang: Several months ago I purchased an SB 200 amp in pretty
> good
> condition. Power output was about 400 watts DC on all bands,
> including WARC
> bands which wasn'nt too bad.  I have installed a Harback power
> supply board
> and "soft key" and it works great with my Kenwood 570..Lately the
> power seems
> to be dropping off and is now down to about 300 Watts.  The HV
> decreases from
> 2300V to around 600 volts when the amp is keyed but plate current
> stays
> constant.  I feel that the tubes are probably the problem but I
> could be
> wrong.  Let me know if any of you have comments on this before I
> invest in a
> new set of tubes.
> Thanks, John kd6pt
>
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