More then 100% modulation Steve.
Probably grid 1, or screen modulation, if there isn't a big LF amplifier
in use for plate or plate and screen modulation.
Good luck with the Old Timer.
Jos on4kj ( 1958 licence )
-----Message d'origine-----
De?: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] De
la part de StephenTetorka@cs.com
Envoyé?: vendredi 3 juin 2005 20:27
À?: amps@contesting.com
Objet?: [Amps] Mod prob?
Hi all:
I obtained a homebrew linear - Shoebox II per CQ July 1967 - using 4 x
6HF5's.
Works really fine on SSB.
However, on AM the plate current meter and my SWR Forward meter swing
down
with speech/modulation...rather severely.
What might cause this?
How bad is this?
Tnx,
Steve
WA2TAK
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