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Re: [Amps] Failure of a pair of FU728F

To: amps <>
Subject: Re: [Amps] Failure of a pair of FU728F
From: Ron Youvan <>
Date: Fri, 20 Sep 2019 10:36:13 -0400
List-post: <>
  John KK9A, wrote:

I believe that the tuning of a tetrode is different than a triode - correct?  Are they tetrodes less reliable or more finicky?

  Tetrodes, if operated properly are a rugged as a tetrode, but they are
more sensitive to heater power, G1 drive power and screen current so
more care is required, in the design and operation, but gain and other
operating parameters are better.
  Ron  KA4INM - Understanding is much better than
                                      knowing how.
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