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[AMPS] 4-400's

To: <>
Subject: [AMPS] 4-400's
From: (Rich Measures)
Date: Tue, 9 Feb 1999 20:43:46 -0800

>Hello all,
>I've been reading with considerable interest the results Frank, W3LPL and
>others in recent days, have had with setting up G-G tuned inputs in a
>passive manner.
>I am putting the final touches to a 10 meter G-G amp using a pair of
>4-400's.  (I am only lacking putting the Millen HV connectors on Plexiglas
>pieces instead of the chassis, thanks to the reflector.)  My tuned input is
>using a pi section with a torroid and two variable caps.  It would make
>things a bunch easier if I could get the caps in the 'ballpark' BEFORE
>firing the amp up.  

C1 should have 25 ohms of reactance for a Q of 2.  Higher Q means less 
bandwidth.  Lower Q means possibly unacceptable min. swr.  .  L and C2 
are adj. for min. swr with the cathodes driven with at least 50% of the 
normal drive.  


R. L. Measures, 805-386-3734, AG6K,  

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