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Author Topic: Info Req on Trio SM-1 Preselector  (Read 1278 times)
K3HVG
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Posts: 149




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« on: December 20, 2007, 03:33:53 PM »

I appears I'm the owner of a new-looking Trio (Kenwood?) HF receiver preselector, Model SM-1.  Unfortunately, I have no book and the two tubes were pulled.  I doped out the box and installed a pair of 6BA6s. The thing appears to work with gain and tuning, evident.  I'd like to get a book or schematic and confirm the tubes I'm using are correct and B+ requirements. By adjusting the B+, it appears to run out of gain at about 80 volts.  Seems a bit low, but who knows.  Any info will be much appreciated.
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