Hi

I’ve always wondered what a FET conversion would do to the accuracy of the calibration book. Yes, that *assumes* the target device actually still has a book that is accurate. 

Of the two, I think I’d go for converting an LM over a BC-221. 

Bob

On Aug 28, 2025, at 3:21 PM, Hubert Miller <[email protected]> wrote:


I think an article on BC-221 or LM FET replacements for the tubes, was in 73 Magazine. I have the article - "somewhere". Nowhere near as involved as any complete receiver replacement. FET means "Filament Eliminated Tube."
-Hue Miller
Sent from my Galaxy

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