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41. [AMPS] PEP philosophy/rules (score: 1): Author: gdaught6@leland.Stanford.EDU (George T. Daughters); Date: Thu, 6 Jan 2000 09:26:26 +0008; Hi All, If I may, I'd like to start a "philosophical" thread which arises from: i) many of us home-brewing amps ii) tuning with a string of high-speed (i.e. high-speed compared to the time constants; /archives//html/Amps/2000-01/msg00157.html (9,128 bytes)
42. SV: SV: [AMPS] Tetrode Amp Help (score: 1): Author: gdaught6@leland.Stanford.EDU (George T. Daughters); Date: Fri, 10 Dec 1999 08:43:06 +0008; Hi all, I'm with Rich on this. "A slow gain variation" is a nonlinearity! Whether it is small enough to be unimportant, i.e. legally acceptable is another question, but why not use a stiff regulator; /archives//html/Amps/1999-12/msg00089.html (9,535 bytes)
43. SV:SV:SV: [AMPS] Tetrode Amp Help (score: 1): Author: gdaught6@leland.Stanford.EDU (George T. Daughters); Date: Wed, 15 Dec 1999 08:22:56 +0008; Hi all, Colin wrote... < snip > I had a nice little 4-65A CW only/ 40m only amplifier many years ago. I pushed it a bit too hard, and the RF choke opened. A few milliseconds later, the screen grid (w; /archives//html/Amps/1999-12/msg00175.html (9,995 bytes)
44. [AMPS] cooling (score: 1): Author: gdaught6@leland.Stanford.EDU (gdaught6@leland.Stanford.EDU); Date: Tue, 21 Dec 1999 12:41:51 +0000; Hi all, Richy wrote... I seriously doubt that the MLA2500 power supply is up to the task of feeding a PAIR of 3cx800's. A single 3cx800 would be more resonable. Also, the output tank on the MLA2500 w; /archives//html/Amps/1999-12/msg00330.html (8,120 bytes)
45. [AMPS] Whither the 807? (score: 1): Author: gdaught6@leland.Stanford.EDU (George T. Daughters); Date: Mon, 1 Nov 1999 08:52:55 +0008; wo0pw wrote... You may have independently come up with it, but you weren't the first. My old friend and Elmer, Jim, w9jbz, used the term frequently in 1955. I don't know where he got it. Why didn't t; /archives//html/Amps/1999-11/msg00034.html (9,025 bytes)
46. [AMPS] Re: Enameled wire size... (score: 1): Author: gdaught6@leland.Stanford.EDU (George T. Daughters); Date: Tue, 2 Nov 1999 13:42:47 +0008; So it was written... WRONG! WRONG!WRONG!WRONG! 1 mm = 1/25.4 inch = 0.03937 inches There are 25.4 mm per inch! I always figure "40mils (milli-inches) per mm." So 0.040" would be way bigger than #39!; /archives//html/Amps/1999-11/msg00089.html (7,507 bytes)
47. [AMPS] tetrode as triode (score: 1): Author: gdaught6@leland.Stanford.EDU (George T. Daughters); Date: Wed, 3 Nov 1999 08:49:20 +0008; Pino wrote... I don't have my data here with me, but as I recall, the 4cxnnn tetrodes are NOT good candidates for using as triodes. They become a low-mu triode with a very fragile grid. If you want t; /archives//html/Amps/1999-11/msg00107.html (7,553 bytes)
48. [AMPS] MLA-2500 mods (score: 1): Author: gdaught6@leland.Stanford.EDU (George T. Daughters); Date: Tue, 9 Nov 1999 08:23:00 +0008; Rich (Russo, not Measures) wrote... Use a SINGLE 3cx800a. The power supply in the Dentron isn't up to a pair of 3cx800's. The SINGLE tube has a dissipation of 800W, the same as the original PAIR of 8; /archives//html/Amps/1999-11/msg00231.html (7,915 bytes)
49. [AMPS] 2 tone intermod test & parrots (score: 1): Author: gdaught6@leland.Stanford.EDU (gdaught6@leland.Stanford.EDU); Date: Wed, 24 Nov 1999 22:04:12 +0000; Hi All, Rich and others have written about .... How about a Norwegian Blue? John Cleese bought one, and it was, well, let's say, a very low noise generator! 8>) 73, George T. Daughters, K6GT -- FAQ o; /archives//html/Amps/1999-11/msg00478.html (8,365 bytes)
50. [AMPS] 4CX1600B Amplifier in new handbook (score: 1): Author: gdaught6@leland.Stanford.EDU (George T. Daughters); Date: Mon, 29 Nov 1999 14:06:08 +0008; Hi, According to what I have heard, that is exactly right. The original "A" version had a smaller cooler, which required more air to cool adequately, resulting in a higher back pressure and more nois; /archives//html/Amps/1999-11/msg00548.html (8,662 bytes)
51. [AMPS] FS: AMP SUPPLY LK-500 ZB (SUPER CLEAN) (score: 1): Author: gdaught6@leland.Stanford.EDU (George T. Daughters); Date: Fri, 15 Oct 1999 08:14:14 +0008; <snip> When anyone posts a message such as this, please include your QTH! Shipping from where? 73, George T. Daughters, K6GT -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@co; /archives//html/Amps/1999-10/msg00499.html (7,218 bytes)
52. [AMPS] amp photos? (score: 1): Author: gdaught6@leland.Stanford.EDU (George T. Daughters); Date: Fri, 29 Oct 1999 11:44:37 +0008; Rich et al. I tried to see the photos on Rich's web page, but when I clicked each one, I was told they ain't there. What did I do wrong? Did anyone have success? 73, George T. Daughters, K6GT -- FAQ; /archives//html/Amps/1999-10/msg00668.html (6,908 bytes)
53. [AMPS] PS Step Start Question (score: 1): Author: gdaught6@leland.Stanford.EDU (George T. Daughters); Date: Wed, 1 Sep 1999 12:19:18 +0008; Bill wrote... Oops... that puts me on stage, I fear. I used a physically small relay, and I think the resistance was much higher... but I'm not at home now, so I'll have to wait to confirm this. This; /archives//html/Amps/1999-09/msg00007.html (9,044 bytes)
54. [AMPS] Selecting an amp for SSB and RTTY (score: 1): Author: gdaught6@leland.Stanford.EDU (George T. Daughters); Date: Thu, 30 Sep 1999 13:58:04 +0008; kk5yy wrote... As I recall, Svetlana is making 8874's at pretty reasonable prices. The ceramic tubes aren't particularly fragile. The spike can be a problem with the 87a, although I haven't used the; /archives//html/Amps/1999-09/msg00350.html (7,632 bytes)
55. [AMPS] re: UTC cg-308 transformer used in FW bridge circuit (score: 1): Author: gdaught6@leland.Stanford.EDU (gdaught6@leland.Stanford.EDU); Date: Sat, 14 Aug 1999 08:14:20 +0000; According to my UTC catalog (60's vintage) the CG308 should be run with the CT grounded. If the model number has a "W" suffix, then the bridge configuration with an ungrounded CT is ok. According to; /archives//html/Amps/1999-08/msg00258.html (8,389 bytes)
56. [AMPS] Re: zero signal Ia (score: 1): Author: gdaught6@leland.Stanford.EDU (George T. Daughters); Date: Mon, 16 Aug 1999 11:19:41 +0008; Hi Johan, I run my 4cx1600B at Va = 3kV, Vs = 350 V; and adjust Vg for Ia = about 0.3 amps. Your 0.27 sounds fine to me! 73, George T. Daughters, K6GT -- FAQ on WWW: http://www.contesting.com/ampsfaq; /archives//html/Amps/1999-08/msg00274.html (6,969 bytes)
57. [AMPS] Peak reading vs True peak (score: 1): Author: gdaught6@leland.Stanford.EDU (George T. Daughters); Date: Wed, 23 Jun 1999 08:59:18 +0008; It has been written... I suspect (opinion only) that "True peak power" is a term invented by marketing, in the specsmanship game. Like "Our peak power rating is the TRUE peak power. Other manufacture; /archives//html/Amps/1999-06/msg00601.html (8,786 bytes)
58. [AMPS] (Fwd) Returned mail: User unknown (score: 1): Author: gdaught6@leland.Stanford.EDU (gdaught6@leland.Stanford.EDU); Date: Sun, 16 May 1999 13:09:58 +0000; This bounced, so I'll post it to the reflector, Hi Larry, Filament = 7.5 volts at 21 amperes Grid/Screen mu = 7 Grid/Plate cap = 0.24 pf Input cap = 27.2 pf Output cap = 7.6 pf Transconductance = 10,; /archives//html/Amps/1999-05/msg00185.html (7,930 bytes)
59. [AMPS] Brightest Bottles (score: 1): Author: gdaught6@leland.Stanford.EDU (George T. Daughters); Date: Wed, 19 May 1999 09:43:40 +0008; Hi All, There have been lots of responses to this, and I was always impressed by the BC610's 250th. The nostalgia wave really washes over me when I remember several HB amps I have known with the merc; /archives//html/Amps/1999-05/msg00231.html (8,122 bytes)
60. [AMPS] RF BURNS (score: 1): Author: gdaught6@leland.Stanford.EDU (George T. Daughters); Date: Thu, 15 Apr 1999 10:22:09 +0008; Brian wrote... I'm guessing you mean high voltage DC. I do know a guy who worked for the local power company and got bit... no make that half-eaten... by HV 60 Hz AC. He was touching the truck that h; /archives//html/Amps/1999-04/msg00291.html (7,907 bytes)

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