[TenTec] Ten-Tec 411 Centaur Amp Problem

[Dr. Gerald N. Johnson]

And so the driver and the PA don't interact so much. Remember all the 
plate current flows in the cathode too (plus grid current) so the input 
and the output tuned circuits are in series with the tube and that 
"input" sees some of the output.

73, Jerry, K0CQ

On 5/31/2010 4:37 PM, Ken Brown wrote:
>
>>   The problem of mismatch is often the result of the use of two or more finals in the amplifier and their resulting parallel input impedance, and the use of a solid state driver with a non tunable final transmitter stage.
> And the failure to include an input tuned circuit to transform the input
> impedance to 50 ohms, so that any length of coax would work equally well.
>
> DE N6KB
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