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Old 29th Nov 2022, 6:15 pm   #17
kalee20
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Join Date: Feb 2007
Location: Lynton, N. Devon, UK.
Posts: 7,084
Default Re: Combined power-pentode and double-diodes?

Quote:
Originally Posted by G6Tanuki View Post
But were there ever any consumer-radio-targeted 'high slope' output-tetrodes/pentodes that let you do a povertyhet using the diodes of an EBF80/89 without needing an intervening triode before the power-stage?
UL41 (and UL84) are high-slope... many cheap record players drove the UL84 directly from a crystal pickup.

The Ferguson 208U is a short-superhet, UCH42, UAF42, UL41, UY41 (all B8A based), the single diode in the UAF41 drives the UL41 with no intermediate AF amplifier.

Despite the lack of overall gain, it is a good radio - Ferguson paid a lot of attention to the coils and tracking at the front end.
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