[AMRadio] info wanted on 4-400 linear amplifier

W7QHO at aol.com W7QHO at aol.com
Wed Aug 3 01:39:43 EDT 2005


I would go for a grounded grid circuit.   As Jim pointed out, 25 watts too 
much for grid driven AB1 or AB2.   Don't have an exact circuit, but the1983 
Handbook describes an amp using a pair of 4-400s 
running GG.   Am sure it could be adapted to a single tube, or maybe you'd 
consider running a pair.   I can copy the article for you.

Dennis D. W7QHO
Glendale, CA

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