[Boatanchors] BC-375 Tube Sub Project: 7984 Curiosity

David Stinson arc5 at ix.netcom.com
Sat Nov 9 17:25:16 EST 2013


----- Original Message ----- 
Subject: Re: [Boatanchors] BC-375 Tube Sub Project: 7984 Curiosity


>Ouch, you're using those monster power valves as an oscillator ? Ick. I bet 
>they would behave >much better if you let them have a 6AG7 come over to 
>play oscillator and them let em be RF >amplifiers like they wuz designed to 
>be...

Can't.  The point of the experiment is to leave the BC-375 intact,
getting it on the air without $1000 worth of "audio" tubes.
Radical circuit changes are out.  The original tubes are series-string fils,
so the choices are fairly narrow.
So far, things look encouraging.
Just don't yet understand why a triode-connected tube (screen to plate)
that oscillates well at 10 MC would have a hard time at 7 MC.
Weird.

73 Dave S.



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