| To: | amps@contesting.com |
|---|---|
| Subject: | Re: [Amps] 3CX3000A7 on 144 MHz |
| From: | Ron W4BIN Youvan <ka4inm@gmail.com> |
| Date: | Fri, 7 Feb 2020 20:25:03 -0500 |
| List-post: | <mailto:amps@contesting.com> |
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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