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1. [Amps] resonant filter tspa (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Mon, 14 May 2007 10:21:25 -0600; This was all discussed here in the late 1990s, (see archive) but i will repeat as there are probably a few different hams reading and contributing since then. Resonant elements in power supply filter; /archives//html/Amps/2007-05/msg00130.html (12,317 bytes)
2. Re: [Amps] resonant filter tspa (score: 1): Author: Angel Vilaseca <avilaseca@bluewin.ch>; Date: Tue, 15 May 2007 08:02:38 +0200; John, Thanks for this post. I am keeping it as a reference. I have a couple of questions: How can the Harris filter (7 H * 0.25 uF = 1.75) and the Galaxy filter ( 4 H * 0.1 uF = 0.4 ) be both resonan; /archives//html/Amps/2007-05/msg00132.html (15,306 bytes)
3. Re: [Amps] resonant filter tspa (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Tue, 15 May 2007 04:28:16 -0400; How can the Harris filter (7 H * 0.25 uF = 1.75) >>> 120Hz and the Galaxy filter ( 4 H * 0.1 uF = 0.4 ) be both resonant at the same frequency, 120 Hz?>> 252Hz Really needs a .4uF across that choke.; /archives//html/Amps/2007-05/msg00133.html (7,214 bytes)
4. Re: [Amps] resonant filter tspa (score: 1): Author: "Jim Tonne" <tonne@comcast.net>; Date: Tue, 15 May 2007 11:19:57 -0400; Tom/Angel/Peter: I went ahead and fired up my LTspice and entered a schematic so I could see for myself what kinds of stress we might see on a capacitor placed in parallel with a filter choke. I used; /archives//html/Amps/2007-05/msg00135.html (9,595 bytes)
5. Re: [Amps] resonant filter tspa (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Tue, 15 May 2007 11:56:43 -0400; FYI.... My Globe Scout has hundreds of volts AC across the choke, and an ALS-600PS has 30-40 volts of reasonably nice 120Hz AC (50 volt DC ouput) across the choke. The wave across the choke should ha; /archives//html/Amps/2007-05/msg00136.html (8,152 bytes)

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