Hi Rich,
his intention is a grounded grid configuration.
The cathode input impedance will be around 120 Ohm which will be best suited
by a low Q Pi-Circuit
Grid swamping would be a bad idea
73
Peter
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
Behalf Of R; Measures
>
> I'm building an amp using a pair of 4-400's in a grounded grid
> configuration. I was wondering about the input tuning and what the
> best way
> of approaching it.
Make the reactance of C-in 25-ohms on each band if u want a low swr
input.
> I have heard of using everything from a 50 ohm swamping
> resistor
For AB1, a grid-swamping R is needed.
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