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21. Re: [Amps] liquid cooling (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Mon, 05 Apr 2010 15:26:28 -0400; Actually good old Dow Corning 200 fluid. There are no normal cooling fluids that have a greater thermal conductivity than water. I worked on a project with an engineer many decades ago trying to come; /archives//html/Amps/2010-04/msg00117.html (13,101 bytes)
22. Re: [Amps] liquid cooling (score: 1): Author: Ron Youvan <ka4inm@tampabay.rr.com>; Date: Mon, 05 Apr 2010 16:27:49 -0400; 40,000 Volts DC across 36" of Teflon tubing does not put H2O the conductor category. It is little more than trivial to add a demineralizer to the cooling circuit. -- Ron KA4INM - The next election, I; /archives//html/Amps/2010-04/msg00118.html (9,824 bytes)
23. Re: [Amps] liquid cooling (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Mon, 05 Apr 2010 16:28:46 -0400; It sure got some others off on a tangent though. Why. It is the best, most reliable, cheapest, and most efficient liquid you will find for cooling. Typically oil is used as an insulator along with th; /archives//html/Amps/2010-04/msg00119.html (14,576 bytes)
24. Re: [Amps] liquid cooling (score: 1): Author: donroden@hiwaay.net; Date: Mon, 05 Apr 2010 15:44:51 -0500; I've run vapor phase and water cooled klystrons for fourty years, and unless there is some compelling reason to vapor phase, I prefer keeping the coolant under 140 degrees f. ( That would be under 10; /archives//html/Amps/2010-04/msg00120.html (11,676 bytes)
25. Re: [Amps] liquid cooling (score: 1): Author: donroden@hiwaay.net; Date: Mon, 05 Apr 2010 15:51:59 -0500; SRI,QTD QRO. QRP now .... Hello ? Hello ? Don WA4NPL _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2010-04/msg00121.html (9,609 bytes)
26. Re: [Amps] liquid cooling (score: 1): Author: donroden@hiwaay.net; Date: Mon, 05 Apr 2010 15:56:08 -0500; 748 gallons of ( looks like mineral oil ) for sale..... NO RETURNS ACCEPTED !!! Don WA4NPL _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contestin; /archives//html/Amps/2010-04/msg00122.html (12,453 bytes)
27. Re: [Amps] liquid cooling (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Mon, 5 Apr 2010 17:02:52 -0400; It's a small extent until air contamination gradually reaches the point where conduction necessitates the purging of the H2O supply. There's a slight amount of evaporation through the vent tubes (at; /archives//html/Amps/2010-04/msg00123.html (9,022 bytes)
28. Re: [Amps] liquid cooling (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 5 Apr 2010 17:14:21 -0400; And then there were those who immersed metal 6L6's and 1614's upside down in a bucket of water and ran them at 100W out. Carl KM1H _______________________________________________ Amps mailing list Am; /archives//html/Amps/2010-04/msg00125.html (14,722 bytes)
29. Re: [Amps] liquid cooling (score: 1): Author: "Mike McCarthy, W1NR" <lists@w1nr.net>; Date: Mon, 05 Apr 2010 17:19:45 -0400; I built a 6L6 (metal) transmitter using the tube upside down in a cup of mineral oil to get 75W input (the old novice limit). Ran like that all day and night long. Mike, W1NR ________________________; /archives//html/Amps/2010-04/msg00127.html (9,367 bytes)
30. Re: [Amps] liquid cooling (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Mon, 05 Apr 2010 17:23:53 -0400; It puts a lower limit on conductivity, but does not define whether it is a resistor or not. Resistors and insulators are separated by a matter of degree with the area in between defined as semiconduc; /archives//html/Amps/2010-04/msg00128.html (10,264 bytes)
31. Re: [Amps] liquid cooling (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Mon, 05 Apr 2010 17:27:38 -0400; That was 100 each too. It takes me 6 of them to get 200 watts music power out. The infamous 6AG7 kilowatt<:-)) 73 Roger (K8RI) _______________________________________________ Amps mailing list Amps@c; /archives//html/Amps/2010-04/msg00129.html (15,538 bytes)
32. Re: [Amps] liquid cooling (score: 1): Author: "Dr. David Kirkby" <david.kirkby@onetel.net>; Date: Mon, 05 Apr 2010 23:08:41 +0100; Water is neither a perfect conductor or insulator. Whether it is more like a conductor or insulator depends on the context. Certainly, I think it wrong to state water is an insulator, when its insula; /archives//html/Amps/2010-04/msg00132.html (10,259 bytes)
33. Re: [Amps] liquid cooling (score: 1): Author: "Ward Silver" <hwardsil@gmail.com>; Date: Mon, 5 Apr 2010 18:05:31 -0500; Dick K4XU demonstrated a solid-state module that was water cooled. He hooked up an electrically controlled sprinkler system valve to the amp keying line and whenever he was transmitting, a stream of; /archives//html/Amps/2010-04/msg00135.html (8,316 bytes)
34. [Amps] Liquid cooling (score: 1): Author: Robert Briggs <vk3zl@bigpond.com>; Date: Tue, 06 Apr 2010 10:18:14 +1000; Good to see more discussion re liquid cooling. However, aside from the merits of various cooling agents, water cooling is probably the simplest and most practical method for the average ham station..; /archives//html/Amps/2010-04/msg00141.html (10,571 bytes)
35. [Amps] Liquid Cooling (score: 1): Author: "John Lyles" <jtml@losalamos.com>; Date: Tue, 6 Apr 2010 09:54:14 -0600; The 200-400 uA leakage is excellent, within the recommendations of CPI/Eimac for their H2O cooled tubes. Your Russian tubes should last a long time if the emission is strong. I use water cooling in 1; /archives//html/Amps/2010-04/msg00152.html (9,178 bytes)
36. Re: [Amps] Liquid Cooling (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Tue, 6 Apr 2010 12:15:21 -0400; That should stay pure for a while! The Alpha Seventy's reservoir (topped-off tube boiler, condenser, and feed line) is roughly 700 mL (about 3 cups of H2O). The bottom of the condenser forms a large; /archives//html/Amps/2010-04/msg00153.html (8,989 bytes)
37. Re: [Amps] Liquid Cooling (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Tue, 6 Apr 2010 12:30:38 -0400; Correction to my last post -- typical leakage current of the Alpha Seventy is 200 uA @ 4KV. I had to get up out of my hair and re-confirm the leakage scale. It's at 1 mA where the "high leakage" sens; /archives//html/Amps/2010-04/msg00154.html (10,440 bytes)
38. Re: [Amps] Liquid Cooling (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Tue, 6 Apr 2010 12:33:11 -0400; It's a bad morning folks..."out of my chair" would make more sense. Paul, W9AC _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailm; /archives//html/Amps/2010-04/msg00155.html (7,957 bytes)
39. Re: [Amps] liquid cooling (score: 1): Author: James Irving <k9jfk@yahoo.com>; Date: Wed, 7 Apr 2010 15:51:22 -0700 (PDT); File this under things no one ever told you. Many years ago I spent several years as a technician for a very large organization. We specialized in testing advanced concepts, many of which became ver; /archives//html/Amps/2010-04/msg00238.html (8,604 bytes)
40. Re: [Amps] liquid cooling (score: 1): Author: mikea <mikea@mikea.ath.cx>; Date: Thu, 8 Apr 2010 08:13:47 -0500; <http://mikea.ath.cx/check-the-oil.html> and sounds like something without which I could do very nicely, though the hardware used to check the oil could make a very nice toy. Other stories are to be; /archives//html/Amps/2010-04/msg00259.html (9,822 bytes)

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