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41. [Amps] Liquid cooling (score: 1): Author: Larry <larry@w7iuv.com>; Date: Mon, 22 Aug 2011 08:21:55 -0700; The recent post regarding water cooling amps has been very interesting. Since I would like to build a liquid cooled tube amp, I'm looking at every bit of information I can find. Some questions I have; /archives//html/Amps/2011-08/msg00141.html (9,490 bytes)
42. Re: [Amps] Liquid cooling (score: 1): Author: mikea <mikea@mikea.ath.cx>; Date: Mon, 22 Aug 2011 10:50:14 -0500; IBM, in its water-cooled mainframes, used distilled water with no additives, IIRC. I've been present at the initial fill of many of these, and don't remember anything being added. Control Data Corp,; /archives//html/Amps/2011-08/msg00142.html (11,441 bytes)
43. Re: [Amps] Liquid cooling (score: 1): Author: "Fuqua, Bill L" <wlfuqu00@uky.edu>; Date: Mon, 22 Aug 2011 12:35:46 -0400; Thermal conductive is directly related to the electrical conductivity in metals. Silver conducts heat better than copper and so on. Copper is good becasuse it is easy to solder to and plate unlike al; /archives//html/Amps/2011-08/msg00143.html (8,839 bytes)
44. Re: [Amps] Liquid cooling (score: 1): Author: Martin A Flynn <maflynn@theflynn.org>; Date: Mon, 22 Aug 2011 12:58:14 -0400; My first attempt at liquid cooling used a plate chiller from a beer system (stainless steel tube embedded in an aluminum block). The second attempt used a machined aluminum block (cross drilled and p; /archives//html/Amps/2011-08/msg00145.html (7,414 bytes)
45. Re: [Amps] Liquid cooling (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 22 Aug 2011 16:31:01 -0400; Ive been running a pair each water cooled 3CX100A5/7289's on 1296 and 2304 for close to 20 years using standard copper plumbing fittings and a 4% silver solder. High silver content will raise the mel; /archives//html/Amps/2011-08/msg00147.html (8,937 bytes)
46. Re: [Amps] Liquid cooling (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Tue, 23 Aug 2011 20:24:38 +0000; Roger, I see that Bill posted some of our private interchange here! No problem with me. But now I feel that I have to reply to your comments! But Arctic Silver conducts heat about ten times worse tha; /archives//html/Amps/2011-08/msg00156.html (10,092 bytes)
47. Re: [Amps] Liquid cooling (score: 1): Author: "Roger (sub1)" <sub1@rogerhalstead.com>; Date: Tue, 23 Aug 2011 21:04:55 -0400; Agreed. I use Artic Silver when I can not solder. The problem with solder is the temperature compared to the critical temp for the device and the need to make sure the entire area between the device; /archives//html/Amps/2011-08/msg00158.html (14,830 bytes)
48. Re: [Amps] Liquid cooling (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Wed, 24 Aug 2011 19:18:34 +0000; Roger, That's good. I would like to buy some Arctic Silver, but need to find a store that will sell me a small amount, and export it! Here in Chile, of course, that stuff is unobtainable from the loc; /archives//html/Amps/2011-08/msg00165.html (16,534 bytes)
49. Re: [Amps] Liquid cooling (score: 1): Author: TexasRF@aol.com; Date: Wed, 24 Aug 2011 15:24:39 -0400 (EDT); Manfred, are there computer repair shops there? Many of the thermal grease products are targeted for CPU cooling applications. 73, Gerald K5GW In a message dated 8/24/2011 2:19:19 P.M. Central Daylig; /archives//html/Amps/2011-08/msg00166.html (16,926 bytes)
50. Re: [Amps] Liquid cooling (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Wed, 24 Aug 2011 17:21:18 -0400; Find out where the gamers and overclockers get their compounds; Chile is no exception. Carl KM1H _______________________________________________ Amps mailing list Amps@contesting.com http://lists.con; /archives//html/Amps/2011-08/msg00167.html (19,973 bytes)
51. Re: [Amps] Liquid cooling (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Wed, 24 Aug 2011 23:58:14 +0000; Gerald, Carl, Yes, there are some. I just checked those that have websites, such as bip.cl. They all seem to sell the same stuff... The best thermal grease they have is Thermaltake TG-1 Extreme, whic; /archives//html/Amps/2011-08/msg00168.html (8,290 bytes)
52. Re: [Amps] Liquid cooling (score: 1): Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>; Date: Thu, 25 Aug 2011 07:53:21 +0100; Good point. We aren't the only ones doing this, and we can learn from experience in other areas. Overclockers use water cooling with confidence, in a location where any leak would be disastrous. Part; /archives//html/Amps/2011-08/msg00171.html (10,894 bytes)
53. Re: [Amps] Liquid cooling (score: 1): Author: "Roger (sub1)" <sub1@rogerhalstead.com>; Date: Thu, 25 Aug 2011 04:38:35 -0400; Are you any where near Santiago? Are there import duties on things like Artic Silver? it's more than likely the standard silicone heat sink compound. Probably SiO2 (Silicone dioxide and a binder such; /archives//html/Amps/2011-08/msg00172.html (24,882 bytes)
54. Re: [Amps] Liquid cooling (score: 1): Author: "Roger (sub1)" <sub1@rogerhalstead.com>; Date: Thu, 25 Aug 2011 04:50:11 -0400; We don't follow that technique. We start with a blob of the transfer compound in the *center* of the heat sink. With spring tension applied the heat sink is rotated back and fourth "with in tolerance; /archives//html/Amps/2011-08/msg00173.html (10,347 bytes)
55. Re: [Amps] Liquid cooling (score: 1): Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>; Date: Thu, 25 Aug 2011 11:11:04 +0100; Thanks, Roger - I learned a little more today. -- 73 from Ian GM3SEK http://www.ifwtech.co.uk/g3sek _______________________________________________ Amps mailing list Amps@contesting.com http://lists.; /archives//html/Amps/2011-08/msg00174.html (9,516 bytes)
56. Re: [Amps] Liquid cooling (score: 1): Author: Gary K9GS <garyk9gs@wi.rr.com>; Date: Fri, 26 Aug 2011 00:02:42 -0500; My company recently quoted a project where we had multiple power transistors that were attached to a LARGE and heavy (150#) aluminum heatsink. I don't believe we used anything other than normal therm; /archives//html/Amps/2011-08/msg00184.html (11,393 bytes)
57. Re: [Amps] Liquid cooling (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Fri, 26 Aug 2011 16:02:24 +0000; Roger, No. I'm 750km away from Santiago. But I have relatives in Santiago, so if necessary I can ask them to get me something from there. The problem is that none of them have the faintest idea about; /archives//html/Amps/2011-08/msg00190.html (20,963 bytes)
58. Re: [Amps] Liquid cooling (score: 1): Author: "Fuqua, Bill L" <wlfuqu00@uky.edu>; Date: Fri, 26 Aug 2011 13:44:36 -0400; The problem with the Class-E with envelope restoration is primarily when amplifying complex spectrally non-symmetric signals such as SSB. They would work fine with AM signals. May work fine with a si; /archives//html/Amps/2011-08/msg00193.html (9,674 bytes)
59. Re: [Amps] Liquid cooling (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Fri, 26 Aug 2011 20:51:32 +0000; Bill, Yes, and that's due to the phase modulation introduced by the varying capacitances of the FETs. These things behave like varactors! Yes, as long as you actually use an AM receiver to receive th; /archives//html/Amps/2011-08/msg00197.html (14,322 bytes)
60. [Amps] Liquid cooling (score: 1): Author: "Art & Rosemary Sellers" <art421@cox.net>; Date: Sun, 28 Aug 2011 17:04:32 -0500; How about using a beer cooler cold plate. The plate will bring room temperature beer down to 40 deg F. For the coolant lquid use distilled or deionized water with Calgon added. Used the Calgon on wat; /archives//html/Amps/2011-08/msg00211.html (7,875 bytes)

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