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1. Topband: Preamp power supply (score: 1): Author: N1BUG <paul@n1bug.net>; Date: Thu, 24 Feb 2005 10:35:13 -0500; Fellow Topbanders, I've run into a glitch! The local switchers have found a new way to harass me! :-) I am looking for suggestions on *aggressive* power supply decoupling / filtering for my W7IUV pre; /archives//html/Topband/2005-02/msg00227.html (7,127 bytes)
2. Re: Topband: Preamp power supply (score: 1): Author: "Herbert Schoenbohm" <herbs@vitelcom.net>; Date: Fri, 25 Feb 2005 10:28:04 -0400; Paul, There are a few things you could try to reduce or eliminate the common mode noise connection: (1) Place the power supply at the antenna and don't power it with DC down the coax but rather run A; /archives//html/Topband/2005-02/msg00231.html (9,122 bytes)
3. Re: Topband: Preamp power supply (score: 1): Author: "John Rogers" <JohnG3PQA@onetel.com>; Date: Fri, 25 Feb 2005 17:16:15 -0000; I had similar noise problems, building the PSU and preamp in the same box, which eventually were fixed by a small ferrite choke in series with the DC supply and an extra 0.47uF capacitor, both on the; /archives//html/Topband/2005-02/msg00235.html (8,212 bytes)

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