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Re: [Amps] 3CX3000A7 on 144 MHz

Subject: Re: [Amps] 3CX3000A7 on 144 MHz
From: Ron W4BIN Youvan <>
Date: Fri, 7 Feb 2020 20:25:03 -0500
List-post: <>
   Jim VE7RF Thomson wrote:

##  I  used  to know  why  the 60hz  hum  appeared  with  an unbalanced CT,  but  have  forgotten  the tech  explanation.   Does anybody  remember ???

  Yep, with directly heated cathodes it causes a change in K to G bias.
  Ron  W4BIN - Understanding is much better than
                                    knowing how.
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