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1. [Amps] Anyone recognize this amp / circuit? (score: 1): Author: "Mark Beckwith" <r-emails@n5ot.com>; Date: Wed, 20 Mar 2013 11:33:56 -0500; I have acquired a homebrew amp as follows: It has two 4-400s in parallel in grounded grid (with a hole for a third one, FWIW). The bandswitch has positions 80-40-20-15. It has TWO 30A Filament transf; /archives//html/Amps/2013-03/msg00276.html (9,543 bytes)
2. Re: [Amps] Anyone recognize this amp / circuit? (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Wed, 20 Mar 2013 14:53:01 -0400; Sounds like a generic pre SS exciters amp that may have been any magazine or HB and modified by the builder. Those same sources will also have info on the other bands in the years since we got 1500W; /archives//html/Amps/2013-03/msg00279.html (11,297 bytes)
3. Re: [Amps] Anyone recognize this amp / circuit? (score: 1): Author: "Jim Hargrave" <w5ifp@gvtc.com>; Date: Wed, 20 Mar 2013 16:52:08 -0500; Mark, Try the 1987 ARRL handbook. The 2x4-400 amp is described on page 30-40. Title "An economy 2 KW Amplifier" I built mine (2 tubes) from scratch in 1979. I switch sections of BC-610 RF coils for t; /archives//html/Amps/2013-03/msg00284.html (10,580 bytes)

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