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#12
January 16th 08, 06:36 AM
posted to rec.radio.amateur.homebrew
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April 1977 QST article
Dual Gate MosFets are convenient for a tube replacement....
As I recall, I rectified the old filament voltage, regulated it, and made that the new "plate" voltage. Other than that, JFETs and, when necessary, Dual Gate MosFETs did most of the work. Well, had to mess with the "grid" bias resistors too. OK, so I used an audio Amp IC for the last part of the audio chain. Still, all in all, the conversions I did were surprisingly easy. Jim -- 22:34 Pacific Time Zone Jan 15 2008 International Time 06:34 UTC 16.01.2008 |
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