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In Reply to: RE: gm70 power playing in the lowest freq's posted by Tre' on January 19, 2017 at 16:46:29
Thanks Tre, I did for a test put the gm70 plate choke in series with the other one 100H each to now 200H and no change!
so whats left?
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I don't remember seeing a schematic.
What about coupling caps? Are they sized correctly?
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
yes I am using experimentally 5uf coupling caps and am using grid chokes of 1.1kH 20kohms dcr
there is no schematic all done up in my head and experimented until i got what i want sound wise and its distortion is .7% @ 3watts 1kc signal
6hv5 is biased at around 30ma 1150v on the plate
gm70 1250v 80ma
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