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1. [AMPS] Re: swr (score: 1): Author: aa6eg@hh.tmx.com (Pat Barthelow); Date: Fri, 1 Oct 1999 17:14:44 -0700 (PDT); I think what we want to say is, the SWR meter meaures SWR of the line, minus small errors caused by small line losses which reduce slightly the indicated swr from the true swr which exists, and the S; /archives//html/Amps/1999-10/msg00036.html (11,551 bytes)
2. [AMPS] Feedpoint impedance vs SWR (score: 1): Author: aa6eg@hh.tmx.com (Pat Barthelow); Date: Sat, 2 Oct 1999 14:23:52 -0700 (PDT); I think I am understanding well the measured SWR vs impedance along the line question. My next question is: Given, say, a 100 ohm resistive antenna impedance (at the antenna terminals) connected to (; /archives//html/Amps/1999-10/msg00053.html (7,701 bytes)
3. [AMPS] Re: Filament Xfmr. (score: 1): Author: aa6eg@hh.tmx.com (Pat Barthelow); Date: Sun, 3 Oct 1999 19:02:45 -0700 (PDT); Hi Larry, Why would you want 4 x 3-500Zs? Two will do max legal power nicely... 73, DX, de Pat, AA6EG/N6IJ; aa6eg@hh.tmx.com;n6ij@hotmail.com 599 DX Drive, Marina CA 93933 See us on the web: www.polk; /archives//html/Amps/1999-10/msg00075.html (10,269 bytes)
4. [AMPS] Henry 2K-3 (score: 1): Author: aa6eg@hh.tmx.com (Pat Barthelow); Date: Mon, 4 Oct 1999 18:55:38 -0700 (PDT); Hi Henry, With a choke input supply, you do not need anywhere near the capacitance, than the more modern supplies without chokes. I even seem to remember that there are negatives to having too much c; /archives//html/Amps/1999-10/msg00169.html (8,836 bytes)
5. [AMPS] Re: Filament Xfmr. (score: 1): Author: aa6eg@hh.tmx.com (Pat Barthelow); Date: Thu, 7 Oct 1999 12:56:57 -0700 (PDT); I just thought a pair of 3-500Zs, properly used, even at full legal output, could also deliver a lifetime of service. My L-4B's 3-500s have been delivering since 1965....in recent years, even in Cont; /archives//html/Amps/1999-10/msg00255.html (12,601 bytes)
6. [AMPS] The things you see Homebrew Amplifiers (score: 1): Author: aa6eg@hh.tmx.com (Pat Barthelow); Date: Thu, 7 Oct 1999 13:06:44 -0700 (PDT); Hi Guys, One thing you might want to be careful of when mounting Anode coolers, is to lift the metal heat dissapator slightly off the glass of the tube, before cinching down the set-screw, to prevent; /archives//html/Amps/1999-10/msg00256.html (9,188 bytes)
7. [AMPS] The things you see Homebrew Amplifiers (score: 1): Author: aa6eg@hh.tmx.com (Pat Barthelow); Date: Thu, 7 Oct 1999 19:08:53 -0700 (PDT); Hi Larry, et al.... I don't understand....Oh, perhaps what you are talking about is a different type of plate cap....My 4-400s have simply a metal rod, about 1/16' dia coming out the top...right out; /archives//html/Amps/1999-10/msg00273.html (11,184 bytes)
8. [AMPS] 4.1000A (score: 1): Author: aa6eg@hh.tmx.com (Pat Barthelow); Date: Wed, 13 Oct 1999 18:24:20 -0700 (PDT); HI F5GNA, Check a local library, especially a University or other Technical Library. There were a number of 4-1000 articles in earlier (50s and 60s) ARRL Amateur Handbooks, also, QST magazine. In gro; /archives//html/Amps/1999-10/msg00441.html (8,078 bytes)
9. [AMPS] Cathode Lifetimes (score: 1): Author: aa6eg@hh.tmx.com (Pat Barthelow); Date: Sun, 31 Oct 1999 15:39:14 -0800 (PST); What is the expected hour lifetime of a typical thoriated tungsten filament tube like the 3-500Z? Assuming no operator abuse/mistakes/parasitics, etc, is there a mechanism for the tube going flat (sh; /archives//html/Amps/1999-10/msg00700.html (6,950 bytes)
10. [AMPS] Re: [TowerTalk] Matching capacitors (score: 1): Author: Pat Barthelow <aa6eg@hh.tmx.com> (Pat Barthelow); Date: Mon, 9 Aug 1999 19:32:16 -0700 (PDT); Hi Guys, I have been wondering the same....Some time ago, I measured capacitance of selected double sided PC Boards, that, as I remember, were abt 1/16" thick, and blue in color, not the typical gree; /archives//html/Amps/1999-08/msg00180.html (11,214 bytes)
11. [AMPS] BIG Capacitors (score: 1): Author: aa6eg@hh.tmx.com (Pat Barthelow); Date: Tue, 20 Jul 1999 12:38:04 -0700 (PDT); For the BIG AMP! 6 ea New, In Box Sprague 4uf, 15KV caps 2ea new, Sprague 2 uf, 7.5KV caps Oil filled cans... Make offer..... 73, DX, de Pat, AA6EG/N6IJ; aa6eg@hh.tmx.com 599 DX Drive, Marina CA 9393; /archives//html/Amps/1999-07/msg00380.html (6,761 bytes)
12. [AMPS] SB 220 PS Diodes (score: 1): Author: aa6eg@hh.tmx.com (Pat Barthelow); Date: Sun, 25 Jul 1999 18:32:13 -0700 (PDT); I just popped a couple of diodes, (maybe more) on the voltage doubler diode circuit on an old SB 220..Dumb mistake, turned it on after making a low voltage keying circuit, on the bottom of the chassi; /archives//html/Amps/1999-07/msg00459.html (7,343 bytes)

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