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1. [Amps] unun (score: 1): Author: Dennis Watkins <andromeda@seanet.com>; Date: Sat, 06 Dec 2003 11:03:22 -0800; Anybody tried putting an "unun" between the filament choke and the input network of a GG amp. If the input Z could be raised up to 200 ohms it would make the input filter-tuner a bit easier to manage; /archives//html/Amps/2003-12/msg00081.html (6,602 bytes)
2. Re: [Amps] unun (score: 1): Author: R.Measures <r@somis.org>; Date: Sun, 7 Dec 2003 00:02:22 -0800; ** The sticky wicket is that the input Z of a g-g amp is not even close to being symmetrical. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contes; /archives//html/Amps/2003-12/msg00110.html (7,440 bytes)
3. Re: [Amps] unun (score: 1): Author: R.Measures <r@somis.org>; Date: Sun, 7 Dec 2003 07:59:14 -0800; ** Without enough signal to produce grid-current, the input Z is sure to higher than with normal grid-current flowing. Murphy was right: "Almost nothing is as simple as it first looks". _____________; /archives//html/Amps/2003-12/msg00114.html (8,099 bytes)
4. Re: [Amps] unun (score: 1): Author: R.Measures <r@somis.org>; Date: Sun, 7 Dec 2003 07:59:13 -0800; ** Dennis -- Example: one 3-500Z in g-g config: The input Z varies continuously from c. 30-ohms to virtually an open circuit during the 360º of the input sinewave. Transformers are not happy cam; /archives//html/Amps/2003-12/msg00115.html (7,722 bytes)

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