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1. [Amps] Ameritron AL-572B (score: 1): Author: jsb@digistar.com; Date: Mon, 20 Oct 2003 12:22:15 -0400 (EDT); I'm on the trail of getting an Ameritron AL-572B - new, from the HamStation. Just wondering if anyone had any recommendations against getting this amp. I have thought about the 3-500Z AL-80B but have; /archives//html/Amps/2003-10/msg00195.html (7,054 bytes)
2. Re: [Amps] Ameritron AL-572B (score: 1): Author: "Peter Frenning, OZ1PIF" <oz1pif@get2net.dk>; Date: Tue, 21 Oct 2003 09:28:34 +0200; I'm partial against the 572b tube, had some very bad luck with two sets of Svetlana's. I finally converted my old FL2000B to use a single QB4/1100 instead. Although a tetrode, I run it as a triode wi; /archives//html/Amps/2003-10/msg00199.html (8,701 bytes)
3. Re: [Amps] Ameritron AL-572B (score: 1): Author: peter.chadwick@Zarlink.Com; Date: Tue, 21 Oct 2003 14:25:39 +0100; against it. I've not found them very fragile, but I have found them prone to VHF parasitics because they have very long grid leads, and as a result, by the time you've cured the parasitics, they're n; /archives//html/Amps/2003-10/msg00207.html (8,009 bytes)
4. Re: [Amps] Ameritron AL-572B (score: 1): Author: R.Measures <r@somis.org>; Date: Tue, 21 Oct 2003 06:20:05 -0700; ** Peter -- Svetlana 572Bs reportedly have more VHF gain than other brands. -- Tetrodes with both grids grounded have very little anode-cathode feedback-C, which should make them more stable than a; /archives//html/Amps/2003-10/msg00208.html (9,906 bytes)
5. Re: [Amps] Ameritron AL-572B (score: 1): Author: gdaught6@Stanford.edu; Date: Wed, 22 Oct 2003 08:44:37 -0700; < snip > Don't forget the 4x150a! A fellow at Eimac told me years ago that you could run them in the '250 applications, SO LONG AS YOU KEEP THEM COOL. Probably fine in G-G service, if you use the pro; /archives//html/Amps/2003-10/msg00210.html (7,947 bytes)

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