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101. [Amps] conductivity problem (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Tue, 31 Aug 2004 14:55:23 -0400; Dear Clive, It's not the Mercury per se, but the effect of a contaminating atmosphere above it that will cause problems. If you could pressurize the vessel slightly with an inert gas such as Argon yo; /archives//html/Amps/2004-08/msg00481.html (7,004 bytes)
102. Re: [Amps] Coil cooling for tubular coils. (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Fri, 3 Sep 2004 17:02:23 -0400; At IBM in Fishkill we circulated liquid Nitrogen through coils. The coils were in a vacuum (10 Torr) so they didn't frost up. Practically, I would think that by diverting some air flow from the main; /archives//html/Amps/2004-09/msg00066.html (7,989 bytes)
103. Re: [Amps] re cooling of coils (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Sun, 5 Sep 2004 17:50:00 -0400; Dear Clive, How interesting a post! In Dover,New Jersey in the states here, is a shop called MANX CYCLE. Its owner and founder, Rich Lamm, drove the Manx on the Isle of Wight race and that gave him t; /archives//html/Amps/2004-09/msg00083.html (9,023 bytes)
104. [Amps] Quiet Cooling (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Mon, 6 Sep 2004 14:16:13 -0400; Sirs, The thread about quiet cooling of amplifiers made me think back to my college days when among studies of alcoholic consumption, music appreciation and techniques for attracting YL's I studied p; /archives//html/Amps/2004-09/msg00115.html (7,265 bytes)
105. [Amps] New Panasonic Tube Radio (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Mon, 6 Sep 2004 14:04:17 -0400; Gents, A friend from my days at Panasonic called the other night and was telling me about a new Panasonic tube radio that is now being marketed in Japan, and he tells me that frequency-conversion kit; /archives//html/Amps/2004-09/msg00116.html (6,794 bytes)
106. [Amps] cooling of coils (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Mon, 6 Sep 2004 14:24:30 -0400; There are several large powerplants in our project domain that use liquid hydrogen to cool the turbines. Hal _______________________________________________ Amps mailing list Amps@contesting.com htt; /archives//html/Amps/2004-09/msg00117.html (6,868 bytes)
107. [Amps] ] Amps 101 (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Mon, 6 Sep 2004 14:01:22 -0400; Gents, This very reflector could be such a forum. However, for some reason, pictures, graphs, schematics and addenda cannot be included, and many readers cannot easily click on embedded links without; /archives//html/Amps/2004-09/msg00118.html (7,430 bytes)
108. Re: [Amps] re cooling of coils (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Mon, 6 Sep 2004 14:21:36 -0400; Dear Traian, Breeder-type reactors especially use liquid sodium cooling in the primary circuit. The problem found was that under severe neutron flux, the sodium metal became itself radioactive and th; /archives//html/Amps/2004-09/msg00119.html (10,389 bytes)
109. Re: [Amps] re cooling of coils (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Mon, 6 Sep 2004 14:08:11 -0400; PAPST manufactures a wide variety of muffin fans. In the DIGI-KEY web catalog, users can bring up the dB ratings of the various models. maker components on ___________________________________________; /archives//html/Amps/2004-09/msg00120.html (8,611 bytes)
110. Re: [Amps] New Panasonic Tube Radio (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Tue, 7 Sep 2004 00:42:01 -0400; Oh, it's a sad, sad story, Mark. For some guys, it's like "Losing The Lottery." Denny's LK-series sure had a huge following. His outboard tranny triple 3-500Z (LK-550) was a great start. I can imagin; /archives//html/Amps/2004-09/msg00151.html (8,195 bytes)
111. [Amps] PWD XFMRS STILL TOPS (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Sat, 11 Sep 2004 01:36:14 -0400; Gentlemen, The replacement filament transformer arrived today from Peter W. Dahl's company in Texas, at no charge for any service. Instead of repairing the old unit that smoked, Peter completely rede; /archives//html/Amps/2004-09/msg00188.html (6,643 bytes)
112. Re: [Amps] ARCO compression trimmer caps (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Sat, 11 Sep 2004 12:16:20 -0400; Please try a Radio Shack pushbutton with a panel mount. Those nuts are probably size 12-40TPI. Hal Mandel W4HBM On Sat, 11 Sep 2004 06:01:29 -0700 Bill Turner <dezrat1242@ispwest.com> writes: _______; /archives//html/Amps/2004-09/msg00199.html (8,384 bytes)
113. Re: [Amps] Dipped Mica Caps (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Sat, 11 Sep 2004 12:20:36 -0400; Dear John, Surprisingly, Max-Gain Systems had some on hand when I needed to update the dipped Silver-Mica caps under the tube sockets in the 77Sx. Try Allan. Hal Mandel W4HBM ________________________; /archives//html/Amps/2004-09/msg00200.html (7,673 bytes)
114. [Amps] tube radio (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Sat, 11 Sep 2004 15:19:08 -0400; I transmit because they are in cheap plastic unshielded enclosures and one cabinet contains a 10 w. ss amp to boost the sound card audio and drive the speakers. This thing rectifies RF and goes crazy; /archives//html/Amps/2004-09/msg00205.html (8,683 bytes)
115. Re: [Amps] AM-6154 questions (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Mon, 13 Sep 2004 16:45:40 -0400; Dear Web, This sounds just like an intermittent contact on a tube-television turret tuner. Remember when you'd be sitting, watching TV, and the picture would roll or fuzz up and you'd get up and give; /archives//html/Amps/2004-09/msg00256.html (8,320 bytes)
116. [Amps] Applying HV to PA anodes (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Fri, 17 Sep 2004 12:45:52 -0400; Gentlemen, In the course of understanding the safe and reliable operation of triode amplifiers, a disparity of information has reached me and I ask for your comments and advice: Pat Stein, manufactur; /archives//html/Amps/2004-09/msg00296.html (7,218 bytes)
117. [Amps] Applying HV during Warmup (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Fri, 17 Sep 2004 13:03:19 -0400; Sirs, As a further point of reference to my previous posting in which the question of when to apply HV to the anodes of ceramic triodes led me to dig up the full poop sheet from EIMAC on the 3CPX1500; /archives//html/Amps/2004-09/msg00297.html (7,666 bytes)
118. Re: [Amps] input matching question on the YC156? (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Fri, 17 Sep 2004 13:37:56 -0400; Gentlemen, In reading the posts below do I detect a tendency to use a HV relay to switch the HV on and off every time the amplifier is keyed? Using the 3CPX5000 scenario posted before, would then the; /archives//html/Amps/2004-09/msg00299.html (9,556 bytes)
119. Re: [Amps] Help - Frontier (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Fri, 17 Sep 2004 14:17:59 -0400; Dear Terry, FRONTIER ENGINEERING 15541 Weld County Road #33 P.O. Box 837 Platteville, CO 80651 (970) - 785 - 2897 Voice (970) - 785 - 2897 FAX Ask for David... (Do you need a 77Dx front panel? You ca; /archives//html/Amps/2004-09/msg00305.html (7,496 bytes)
120. Re: [Amps] input matching question on the YC156? (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Fri, 17 Sep 2004 15:09:19 -0400; Sirs, One of the phenomena about amplifiers that concerns me is the precipitation of VHF parasitic oscillations by transient-pulse type events much akin to hitting a bell with a clapper. The proponen; /archives//html/Amps/2004-09/msg00309.html (10,048 bytes)

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