In Reply to: RE: Lundahl LL1620cfb posted by amnesiac on December 18, 2014 at 06:50:12:
Yes, the feedback is coming from the secondary. It is another variation of CF. At the end of the day, we're trying to make a Pentode more linear using local Cathode feedback as opposed to global feedback else you can employ global feedback. I assume that is the reason you're interested in the CF windings. I can't imagine feedback that is not AC in nature.
If you run straight DC through your primaries, not happens in the secondaries. The AC element is what we're trying to amplify and reproduce accurately.
Stuben
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- RE: Lundahl LL1620cfb - Stuben 12/18/1410:59:58 12/18/14 (0)