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1. Topband: control voltage noise in K9AY loop (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Wed, 10 Oct 2007 17:39:27 -0400; I have just finished homebrewing a 4-way switched K9AY loop. I used an old Heathkit cable-less antenna switch, model HD-1481, as the controller. On the antenna end I used Gary's circuit except for sw; /archives//html/Topband/2007-10/msg00026.html (7,510 bytes)
2. Re: Topband: control voltage noise in K9AY loop (score: 1): Author: Paul Baldock <pbaldock@verizon.net>; Date: Wed, 10 Oct 2007 18:33:14 -0700; I had the same problem, but only with +/-12V but not with 12V AC. I solved it by using an isolation style 9:1 transformer rather than the auto-transformer. I let the input side of the transformer and; /archives//html/Topband/2007-10/msg00030.html (7,128 bytes)

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