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1. [Amps] liquid cooling (score: 1): Author: Larry <larry@w7iuv.com>; Date: Mon, 05 Apr 2010 09:06:52 -0700; The recent discussion on water cooling amp tubes got me thinking. Again. (not a good thing) Basically I would like to play with liquid cooling but I can't/won't use water. While I was still working,; /archives//html/Amps/2010-04/msg00095.html (8,966 bytes)
2. Re: [Amps] liquid cooling (score: 1): Author: TexasRF@aol.com; Date: Mon, 5 Apr 2010 12:15:45 EDT; Larry, I wonder why your aversion to using water? 73, Gerald K5GW In a message dated 4/5/2010 11:07:23 A.M. Central Daylight Time, larry@w7iuv.com writes: The recent discussion on water cooling amp t; /archives//html/Amps/2010-04/msg00096.html (9,403 bytes)
3. Re: [Amps] liquid cooling (score: 1): Author: "Mike & Becca Krzystyniak" <k9mk@flash.net>; Date: Mon, 5 Apr 2010 11:33:07 -0500; Larry, Call me chicken but any discussion about using cooloants with flash points or other has a waft of Darwinism associated with it... Water: Inherently Safe. ATF: Inherently Unsafe. Mike K9MK The; /archives//html/Amps/2010-04/msg00097.html (9,880 bytes)
4. Re: [Amps] liquid cooling (score: 1): Author: mikea <mikea@mikea.ath.cx>; Date: Mon, 5 Apr 2010 11:35:45 -0500; I can't speak for Larry, but have worked with very large water-cooled mainframe computers. They needed some care and feeding to prevent algae growth, and I don't doubt that IBM put a lot of time and; /archives//html/Amps/2010-04/msg00098.html (9,536 bytes)
5. Re: [Amps] liquid cooling (score: 1): Author: Ron Youvan <ka4inm@tampabay.rr.com>; Date: Mon, 05 Apr 2010 12:49:40 -0400; The L3 company has a division that makes "MDC IOT" transmitting tubes, their date for these tubes indicates the cooling oil they use, which is a synthetic fluid. -- Ron KA4INM - The next election, I; /archives//html/Amps/2010-04/msg00100.html (9,677 bytes)
6. Re: [Amps] liquid cooling (score: 1): Author: Ron Youvan <ka4inm@tampabay.rr.com>; Date: Mon, 05 Apr 2010 13:10:08 -0400; /*snip*/ Wrong, water (H2O) is an insulator. It is used with nearly 40 kV on collectors of klystrons and other high power UHF transmitting tubes. Dirty water is conductive and it doesn't take much to; /archives//html/Amps/2010-04/msg00101.html (10,583 bytes)
7. Re: [Amps] liquid cooling (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Mon, 5 Apr 2010 13:11:17 -0400; actually get the water up to boiling, and _LOTS_ of energy is carried off in those steam bubbles. " With vapor-phase cooling, a rise in H2O temperature near the boiling point is fine, but heat trans; /archives//html/Amps/2010-04/msg00102.html (9,881 bytes)
8. [Amps] Liquid Cooling (score: 1): Author: "John Lyles" <jtml@losalamos.com>; Date: Mon, 5 Apr 2010 11:33:59 -0600; At work we use oil cooling for a number of situations with high voltage. The oil gives a great benefit for insulation and allows more compact layouts. I don't know of any RF amplifiers this way, only; /archives//html/Amps/2010-04/msg00103.html (9,621 bytes)
9. Re: [Amps] liquid cooling (score: 1): Author: jim feldman <mtnredhed@gmail.com>; Date: Mon, 5 Apr 2010 10:40:30 -0700; Maybe I'm speaking from ignorance, but I don't see the issue. The high end PC builders have been using liquid cooling for years (for fanless or overclocked cpu's) and there's plenty of off the shelf; /archives//html/Amps/2010-04/msg00104.html (9,121 bytes)
10. Re: [Amps] liquid cooling (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Mon, 5 Apr 2010 17:42:20 +0000 (UTC); Paul (KG7HF) The recent discussion on water cooling amp tubes got me thinking. Again. (not a good thing) _______________________________________________ Amps mailing list Amps@contesting.com http://; /archives//html/Amps/2010-04/msg00105.html (8,257 bytes)
11. Re: [Amps] liquid cooling (score: 1): Author: "Bill, W6WRT" <dezrat1242@yahoo.com>; Date: Mon, 05 Apr 2010 10:48:47 -0700; ORIGINAL MESSAGE: REPLY: LOL! Made my (air cooled) day. :-) 73, Bill W6WRT _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/li; /archives//html/Amps/2010-04/msg00106.html (8,583 bytes)
12. Re: [Amps] liquid cooling (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Mon, 5 Apr 2010 13:51:32 -0400; That's the basis for the 1966 QST article entitled "The Stanley Steamer." That amp used only convection currents as the condenser was positioned horizontally and became a part of the top cabinet. Th; /archives//html/Amps/2010-04/msg00107.html (8,837 bytes)
13. Re: [Amps] Liquid Cooling (score: 1): Author: Ron Youvan <ka4inm@tampabay.rr.com>; Date: Mon, 05 Apr 2010 13:53:12 -0400; It has been very common for the rectifiers of in X-ray machines to be immersed under oil with the transformer, I have asked technicians what the equipment is like, they say 6 glowing glass tubes, six; /archives//html/Amps/2010-04/msg00108.html (9,352 bytes)
14. Re: [Amps] liquid cooling (score: 1): Author: mikea <mikea@mikea.ath.cx>; Date: Mon, 5 Apr 2010 13:07:20 -0500; I see that QTD is unassigned. I propose QTD Will you activate fire-suppression systems on your equipment (specify equipment if required)? I have activated fire-suppression systems on my equipment (sp; /archives//html/Amps/2010-04/msg00109.html (9,905 bytes)
15. Re: [Amps] liquid cooling (score: 1): Author: "Dr. David Kirkby" <david.kirkby@onetel.net>; Date: Mon, 05 Apr 2010 19:08:39 +0100; It is incorrect to say water is an insulator. No matter how much you distill it, there is a degree of self-ionization. http://en.wikipedia.org/wiki/Self-ionization_of_water which puts an lower limit; /archives//html/Amps/2010-04/msg00110.html (9,941 bytes)
16. Re: [Amps] liquid cooling (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 5 Apr 2010 14:19:18 -0400; ATF starts to break down at 170-175F which is why transmission failures are so common. Running thru an air cooled cooler is one way to extend the life and mitigate the temperature rise. I hope we don; /archives//html/Amps/2010-04/msg00111.html (11,592 bytes)
17. Re: [Amps] liquid cooling (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 5 Apr 2010 14:19:23 -0400; Sounds like a job for good old PCB transformer oil maybe??? Carl KM1H _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinf; /archives//html/Amps/2010-04/msg00112.html (11,856 bytes)
18. Re: [Amps] liquid cooling (score: 1): Author: "Bill, W6WRT" <dezrat1242@yahoo.com>; Date: Mon, 05 Apr 2010 11:41:25 -0700; ORIGINAL MESSAGE: REPLY: Great idea, except I recommend QHS as in Q-holy-s** 73, Bill W6WRT _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesti; /archives//html/Amps/2010-04/msg00113.html (9,065 bytes)
19. Re: [Amps] liquid cooling (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Mon, 05 Apr 2010 15:16:31 -0400; It's an entirely different issue. Take it from who has worked with both and has several decades working with water cooled RF generators. It is not a matter of scale! The issues you have to deal with; /archives//html/Amps/2010-04/msg00114.html (10,028 bytes)
20. Re: [Amps] liquid cooling (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Mon, 05 Apr 2010 15:21:11 -0400; Only to a small extent. You should not see any humidity escape the system except possible a small amount at at startup. The system uses a condenser that allows for pressure changes, but it is essenti; /archives//html/Amps/2010-04/msg00116.html (10,066 bytes)

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