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Re: [Amps] Designing the Cleanest Linear with RF Negative Feedback

To: <amps@contesting.com>
Subject: Re: [Amps] Designing the Cleanest Linear with RF Negative Feedback
From: "Tom Cathey" <K1JJ@comcast.net>
Date: Thu, 15 Dec 2005 00:09:34 -0500
List-post: <mailto:amps@contesting.com>
Correction:

It was pointed out to me that the cathode resistor for negative feedback is 
to be used only for a grid driven [grounded cathode] amplifier to generate 
degenerative [negative] feedback.

In a cathode driven [GG] amplifier, the cathode is in phase with the plate 
and it will not work. A different method must be used for neg feedback.

This is why my GG triode did not show any diffence in drive when I  tried 
the cathode resistor.

I saw the idea in the archives and must have missed the fact that they were 
talking about grid driven amps at the time.

73,
Tom, K1JJ 

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