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In Reply to: RE: I can't read the type number... posted by Allen Wright on November 03, 2009 at 02:54:46
Allen is correct about regulating g2 B+. Also, open loop linearity will be better if g2 B+ is less than anode B+.
The fact that the intended O/P "iron" has lots of magnetic headroom is good. Full pentode mode requires more total NFB than UL mode does. If 100% of the NFB is global, LOTS of magnetic headroom is needed or the core will saturate.
Eli D.
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