[Amps] SB-200

Vic K2VCO k2vco.vic at gmail.com
Wed Feb 8 21:27:19 PST 2012

Take a very close look at the bandswitch contacts that are connected to those switched caps.

On 2/8/2012 6:33 PM, Tom Osborne wrote:
> Hi All.
> I have a SB-200 and it developed a problem in the last week or so.
> When tuning up on 40, the Load cap is all the way meshed and the Tune cap is
> about 50% meshed.  It puts out about 400 watts on 40.  On 40, the input SWR
> is 1:1.
> In 80 the Load cap is all the way meshed.  It puts out about 200 watts.  The
> input SWR is 1:1.
> I checked to make sure the 2 sections of the Load cap were soldered together
> OK and they are.  I disconnected the cap that is switched in on 80 and
> replaced it with another one and still doing the same thing.
> If the tubes are going soft, will it affect the tuning like that?  Seems
> like I've replaced the tubes before but never had the problem of the Load
> cap being all the way meshed to load on 40.  Thanks and 73
> Tom W7WHY
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Vic, K2VCO
Fresno CA

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