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21. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: "Joe Subich, W4TV" <w4tv@subich.com>; Date: Sun, 27 Aug 2006 13:00:44 -0400; Rich's suppressors work but not for the reason that he claims. Nichrome is not a magic bullet and "low Q" or "Low Rp" is total nonsense. The instructions for the SB-220 (and any dual 3-500Z amplifier; /archives//html/Amps/2006-08/msg00706.html (12,036 bytes)
22. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: Bill Turner <dezrat@copper.net>; Date: Sun, 27 Aug 2006 10:05:41 -0700; ORIGINAL MESSAGE: -- REPLY FOLLOWS -- Agreed. For decades, hams have stuck a parasitic suppressor in the anode circuit because "it's the thing to do", and of course it nearly always works. I think a; /archives//html/Amps/2006-08/msg00707.html (10,443 bytes)
23. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: Bill Turner <dezrat@copper.net>; Date: Sun, 27 Aug 2006 10:09:46 -0700; ORIGINAL MESSAGE: -- REPLY FOLLOWS -- It won't be win/win if two conditions are present: 1. The suppressor really is needed. and 2. The resistor gradually decreases in value due to overheating. If th; /archives//html/Amps/2006-08/msg00708.html (9,741 bytes)
24. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: "Mike Sawyer" <w3slk@uplink.net>; Date: Sun, 27 Aug 2006 13:48:03 -0400; Snip: You are a charlatan and a fool ... you have perverted engineering science to promote your own snake oil and take advantage of those who do not have the background and ability to see through you; /archives//html/Amps/2006-08/msg00712.html (10,262 bytes)
25. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>; Date: Sun, 27 Aug 2006 18:54:47 +0100; If anyone cares to read it, the record of the 1996 debate on rec.radio.amateur.homebrew is available on Google Groups at: http://tinyurl.com/fe2qz Be prepared for 217 messages which will tell a diffe; /archives//html/Amps/2006-08/msg00713.html (11,615 bytes)
26. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: "k7rdx" <k7rdx@charter.net>; Date: Sun, 27 Aug 2006 11:01:59 -0700; Tony,ever wonder why some kids were bullys in school?They do what they see at home....Nice people generally came from nice parents...73,Jim K7RDX... -- Original Message -- From: "Tony King - W4ZT" <a; /archives//html/Amps/2006-08/msg00714.html (12,248 bytes)
27. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Sun, 27 Aug 2006 14:18:12 -0400; Mikey, I don't Joe was the first to cast that stone. Why be so rough on him? 73 Tom _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/; /archives//html/Amps/2006-08/msg00716.html (9,669 bytes)
28. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: "Mike Sawyer" <w3slk@uplink.net>; Date: Sun, 27 Aug 2006 14:51:11 -0400; You gotta be kidding me?!??? Mike(y) W3SLK -- Original Message -- From: "Tom W8JI" <w8ji@w8ji.com> To: "Mike Sawyer" <w3slk@uplink.net>; "Joe Subich, W4TV" <w4tv@subich.com>; <AMPS@CONTESTING.COM> Se; /archives//html/Amps/2006-08/msg00717.html (10,093 bytes)
29. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: "John Vickers" <wa4tt@nlamerica.com>; Date: Sun, 27 Aug 2006 14:49:49 -0400; I believe you said this was a pair of 813's. I still have one I built in 1965 running 3 813's and its never had an anode suppressor in it. Just a wide copper strap from the plate choke (homebrew) to; /archives//html/Amps/2006-08/msg00718.html (10,317 bytes)
30. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Sun, 27 Aug 2006 15:03:00 -0400; I took a look at the alt.amateur-radio.homebrew discussion, and it didn't look like Wes was that mad at Rich, he just did the experiment. He also said he couldn't get to the page that Rich had posted; /archives//html/Amps/2006-08/msg00719.html (12,338 bytes)
31. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: "Mike Sawyer" <w3slk@uplink.net>; Date: Sun, 27 Aug 2006 15:07:00 -0400; beneficial if you had figured out WHY. 73, John WA4TT John, That's a good point. As a member of the "design team", (I say that tongue in cheek), that they were installed as a preventative measure. T; /archives//html/Amps/2006-08/msg00720.html (10,098 bytes)
32. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Sun, 27 Aug 2006 15:06:56 -0400; Actually Paul Hrivnak of Vectronics, when he was convinced the glass in Chinese 3-500's was melting from parasitics, included a nichrome hairpin in his single 3-500Z amp. The amp kept melting holes; /archives//html/Amps/2006-08/msg00721.html (11,277 bytes)
33. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: "Joe Subich, W4TV" <w4tv@subich.com>; Date: Sun, 27 Aug 2006 15:15:07 -0400; Mikey, That is nothing more that rich has been doing to other participants of the Amps list for years. Frankly, his constant misrepresentation of Wes Stewart's work and work by others is far more "ch; /archives//html/Amps/2006-08/msg00722.html (10,688 bytes)
34. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Sun, 27 Aug 2006 15:15:16 -0400; That is electrically impossible. There is only so much emission available, and the force from even many dozens of amperes is in the order of grams. It is nearly impossible from filament inrush, it i; /archives//html/Amps/2006-08/msg00723.html (8,170 bytes)
35. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: Scott Manthe <n9aa@arrl.net>; Date: Sun, 27 Aug 2006 15:08:39 -0500; My guess would be "Lsup" = inductive (parasitic) suppressor. 73, Scott, N9AA _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/; /archives//html/Amps/2006-08/msg00724.html (6,870 bytes)
36. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Mon, 28 Aug 2006 02:08:53 -0400; Folks, I guess I did miss this link at the very bottom of Wes's webpages. Below is the link that explains it all. I hope it can be of help as it sure did help me in what I wanted to find out. "Parasi; /archives//html/Amps/2006-08/msg00731.html (8,216 bytes)
37. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: R L Measures <r@somis.org>; Date: Mon, 28 Aug 2006 07:12:07 -0700; For tubes with no midpoint filament support, I concur, however, in most cases the HV-PS can not deliver enough Joules during a single event to bend the filament helices of a 3-500Z far enough out of; /archives//html/Amps/2006-08/msg00742.html (10,833 bytes)
38. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: "Robert B. Bonner" <rbonner@qro.com>; Date: Mon, 28 Aug 2006 16:05:26 -0500; I have only had one 3-500Z amplifier take off on me when I was purposely testing PC suppressors back in the early 1970's. I was attempting to improve 15 and 10 meter performance. For some stupid reas; /archives//html/Amps/2006-08/msg00743.html (8,682 bytes)
39. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: "Harold Mandel" <ka1xo@juno.com>; Date: Mon, 28 Aug 2006 17:50:48 -0400; What's a PC suppressor? Hal Mandel --Original Message-- [snip] I have only had one 3-500Z amplifier take off on me when I was purposely testing PC suppressors back in the early 1970's. I was attempti; /archives//html/Amps/2006-08/msg00744.html (7,600 bytes)
40. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: R L Measures <r@somis.org>; Date: Mon, 28 Aug 2006 20:10:02 -0700; 813s don't need a VHF suppressor because they are pushing the limit at 28MHz. R L MEASURES, AG6K. 805-386-3734 r@somis.org _______________________________________________ Amps mailing list Amps@conte; /archives//html/Amps/2006-08/msg00749.html (11,157 bytes)

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