Mail Archive Search: <+from:n4zr@contesting.com>

Results:

References: [ +from:n4zr@contesting.com: 415 ]

Total 415 documents matching your query.

101. [AMPS] 3/2 power law and Rich's very wide signal (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Wed, 29 Mar 2000 10:04:21 -0500; How about Rich, intoning "feculence" over and over? 73, Pete N4ZR Don't forget to update your entry in the World Contest Station Database http://206.102.70.3/search.htm -- FAQ on WWW: http://www.cont; /archives//html/Amps/2000-03/msg01058.html (9,967 bytes)
102. [AMPS] Fil voltage al-1200 (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Wed, 09 Feb 2000 08:55:50 -0500; I can't parse amps with you guys, but English is another story -- a moot point is one that doesn't matter. The point of Rich's maneuver is to avoid admitting he /ever/ makes a mistake. 73, Pete N4ZR; /archives//html/Amps/2000-02/msg00149.html (8,193 bytes)
103. [AMPS] ameritron al-82 (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Tue, 15 Feb 2000 10:57:05 -0500; On the other hand, if he holds it to the legal 200W power for 30m, the I-squared part will be pretty small, and the risk probably commensurate. 73, Pete N4ZR Don't forget to update your entry in the; /archives//html/Amps/2000-02/msg00257.html (7,958 bytes)
104. [AMPS] ameritron al-82 (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Tue, 15 Feb 2000 15:20:22 -0500; Oh? So reducing plate current by a factor of 4 doesn't reduce Isquared-R heating of the bandswitch by a factor of 16, as I'd expect? Seems counterintuitive, but I'll take your word for it unless othe; /archives//html/Amps/2000-02/msg00260.html (8,827 bytes)
105. [AMPS] a little praise (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Mon, 21 Feb 2000 19:15:46 +0000; Perhaps we should tell KM1H and W8JI that all is forgiven.... 73, Pete Smith N4ZR n4zr@contesting.com Don't forget to update your entry on the World Contest Station Database, at http://206.102.70.3/s; /archives//html/Amps/2000-02/msg00442.html (7,804 bytes)
106. [AMPS] Diodes (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Tue, 22 Feb 2000 10:53:13 -0500; I was reading the HF amps section the other day, and was surprised to read the flat statement that the filament choke is not necessary in grounded-grid amplifiers at HF. Or did I misunderstand? 73, P; /archives//html/Amps/2000-02/msg00485.html (8,995 bytes)
107. [AMPS] Filament Chokes (was Diodes) (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Tue, 22 Feb 2000 11:11:03 -0500; it is An important omission on my part, since otherwise the filament transformer winds up in the input circuit! But aren't filament chokes used in virtually every 3CX800, 8877, etc. amp? 73, Pete N4Z; /archives//html/Amps/2000-02/msg00487.html (9,287 bytes)
108. [AMPS] Blow TL922 (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Thu, 24 Feb 2000 09:52:00 -0500; Rich, wouldn't it be reasonable to surmise that he's lost the cut-off bias, perhaps because of a contact failure in the much-maligned TL-922 T/R relay? That would certainly explain the plate current; /archives//html/Amps/2000-02/msg00550.html (8,799 bytes)
109. [AMPS] Blow TL922 (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Thu, 24 Feb 2000 15:22:45 -0500; But as you pointed out, in a previous post, " If you have output, the tubes can not be shorted, so there should be no Ip on standby." In my SB-220, the bias contacts were sticking both closed and ope; /archives//html/Amps/2000-02/msg00556.html (8,685 bytes)
110. [AMPS] Economical amp with 160M (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Wed, 05 Jan 2000 12:28:50 -0500; I'm looking for advice on a relatively low-cost ~1KW older amplifier that includes 160m coverage. Originally I had thought of modifying my SB-220 but have been dissuaded, I think, so I need to do som; /archives//html/Amps/2000-01/msg00125.html (7,426 bytes)
111. [AMPS] SB-220 conundrum (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Tue, 18 Jan 2000 11:19:39 -0500; Here's a weird one for the group. I replaced the T/R relay in my SB-220 with a pair of vacuum relays -- an HC-1 on the output side and a tiny Hi-G d'Italia on the input side. It works great, but ther; /archives//html/Amps/2000-01/msg00393.html (9,338 bytes)
112. [AMPS] SB-220 conundrum (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Tue, 18 Jan 2000 13:43:22 -0500; indicative of to the to the Good ideas, Vic. As far as I can tell, my relay change should have done little to the situation. If you know the layout of the SB-220, the three cables (from the input, to; /archives//html/Amps/2000-01/msg00396.html (9,663 bytes)
113. [AMPS] re: SB220 conundrum (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Tue, 18 Jan 2000 16:55:14 -0500; I really don't think so. The amp goes all the way down to resting plate current at zero drive, and grid and plate currents track on drive smoothly and proportionally all the way up to maximum output.; /archives//html/Amps/2000-01/msg00397.html (7,314 bytes)
114. [AMPS] SB-220 conundrum (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Wed, 19 Jan 2000 12:20:31 +0000; bands. Ed I'll look, Ed .... but if it had come loose, I'd think it'd be flakey on more than one band. Thanks! 73, Pete Smith N4ZR n4zr@contesting.com Don't forget to update your entry on the World C; /archives//html/Amps/2000-01/msg00417.html (8,780 bytes)
115. [AMPS] SB-220 conundrum (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Wed, 19 Jan 2000 12:30:10 +0000; Without any other indications of instability? 'Way back when, the conventional wisdom for grid-driven stages was that the plate dip and max output setting of the plate cap always were a little off ea; /archives//html/Amps/2000-01/msg00418.html (9,201 bytes)
116. [AMPS] your sb-220 mod (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Wed, 19 Jan 2000 09:02:08 -0500; Could be, but I don't have access to anything better. It does seem odd that this is happening on only one band, in the middle of the operating frequency range, if that's the reason. Any comments on a; /archives//html/Amps/2000-01/msg00419.html (7,664 bytes)
117. [AMPS] Harbach rumor (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Thu, 02 Dec 1999 10:29:58 -0500; There is s rumor circulating on another reflector that Allen Harbach (did I spell his name right) of Heath amplifier part fame was on the Egyptair flight. Can anyone (hopefully) lay this one to rest?; /archives//html/Amps/1999-12/msg00008.html (6,760 bytes)
118. [AMPS] SB-220 Ip (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Mon, 06 Dec 1999 13:24:50 -0500; Recently I modified my SB-220 to incorporate vacuum-relay QSK. In the process I did very little to change the RF cabling under the chassis, but the input side relay did require a total of 3 inches of; /archives//html/Amps/1999-12/msg00045.html (7,477 bytes)
119. [AMPS] BeO Cautions (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Sun, 26 Dec 1999 15:17:56 +0000; It is worth differentiating between substances that are immediately toxic, those with potentially harmful effects from long-term, occupational exposure and those with long-term adverse environmental; /archives//html/Amps/1999-12/msg00381.html (8,910 bytes)
120. [AMPS] Been having trouble posting to reflectors (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Mon, 08 Nov 1999 16:48:26 -0500; Please disregard this message. 73, Pete N4ZR Sometimes a tower is just a tower -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQ; /archives//html/Amps/1999-11/msg00211.html (6,701 bytes)

Current List: 101 - 120
Page: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20]