I have an SB200 here which is a little different than any others I've
seen.. It has an RCA type input connector, and also a two gang load
capacitor. I am wondering if anyone else has seen this type . I just
finished installing a new power supply board, soft start unit and soft key
unit.!! (Harbach mods) I didn't notice the input connector before because I
couldn't fire it up on account of the "terrible " condition of the old
pwr.board.
Anyway, when I was done with the mods and started checking things out I
noticed it was oscillating a bit on 20 and 40 mtrs. Noinput and unloaded
output. With a dummy load on the output it appears stable. I have worked on
a number of these amps and never saw one unstable.However, I rewound the
plate choke , as it looked burned , and also the fil. choke (18 ga. wire, to
drop the fil v a little) I don't really know if I might have accidentally
caused a problem , but I'd like to hear any comments anyone might have.!!!
thanks to all.!!!
carl / kz5ca
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