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1. [Amps] Automatic bandswitching (score: 1): Author: "Partain, Chuck" <Chuck_Partain@maxtor.com>; Date: Wed, 15 Feb 2006 10:21:32 -0500; curious on this subject... what would it take to do a electronic(no moving parts) bandswitch?? Remember the varactor? I had a heathkit gr-2000 tv with varactor tuning.. Anyone know or make some high; /archives//html/Amps/2006-02/msg00267.html (6,613 bytes)
2. Re: [Amps] Automatic bandswitching (score: 1): Author: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>; Date: Wed, 15 Feb 2006 17:48:24 +0100 (CET); Chuck asked: If you're talking tubes, it's interesting. PIN diodes are available that withstand 2000 volts, so for say a pair of 3-500Z at 3000 volts, you'd need at least 3 in series. But then the pr; /archives//html/Amps/2006-02/msg00268.html (7,026 bytes)
3. Re: [Amps] Automatic bandswitching (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Wed, 15 Feb 2006 12:38:24 -0500; Anyone remember the National MB-150 all band (except 160 and maybe WARC) network? Wonder if there is something like it for 2kW or so that matched 50ohms. 73 Bill wa4lav ______________________________; /archives//html/Amps/2006-02/msg00269.html (7,632 bytes)
4. Re: [Amps] Automatic bandswitching (score: 1): Author: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>; Date: Wed, 15 Feb 2006 21:44:07 +0100 (CET); WARC) network?< I suspect it would be REAL fun trying to make one to cover all the HF ham bands below 30MHz. A problem is that you can get it to resonate at two frequencies at once, where one is a ha; /archives//html/Amps/2006-02/msg00272.html (8,057 bytes)

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