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1. [Amps] HIGH INPUT SWR PROBLEM (score: 1): Author: "Bill McHugh" <magoo@isp.ca>; Date: Thu, 12 Dec 2019 01:34:44 +0000; I have a commercial amp from Europe running a pair of GI7B tubes. The amp works well and loafs along at 500W output with no problems on any band, but it has a very high input SWR on all bands. Design; /archives//html/Amps/2019-12/msg00015.html (8,477 bytes)
2. Re: [Amps] HIGH INPUT SWR PROBLEM (score: 1): Author: Steve Thompson <g8gsq72@gmail.com>; Date: Thu, 12 Dec 2019 09:21:12 +0000; I think the GI7 is indirectly heated with a cathode, like 8877. If there's no coupling cap between the cathode and filaments, it shouldn't need a big heavy duty filament choke like you need with 3-50; /archives//html/Amps/2019-12/msg00016.html (10,683 bytes)

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