That works.
I had a 6L6 as clamp tube in my pair of 6146B ampifier since I was using plate
modulation. But did not use in for larger amplifiers.
73
Bill wa4lav
-----Original Message-----
From: Vic Rosenthal <vic@rakefet.com>
To: DF3KV <df3kv@aol.com>
Date: Sat, 09 Oct 2004 17:40:24 -0700
Subject: Re: [Amps] Need for input tuning circuit
DF3KV wrote:
> How was full class-C maintained on the opposite cycle, when no grid
> current flows?
> For full class-C the 813 has to be biased with -155V at 2250V EHT
There needs to be a capacitor across the grid resistor that is charged during
the period that grid current is flowing. If you have a parallel tuned input
circuit from grid to ground, the blocking capacitor that keeps the bias from
being shorted out by the coil performs this function. Or you can have an RF
choke connected to the grid in series with the grid resistor and a bypass
capacitor connected between the junction between the choke and resistor and
ground.
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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