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1. Re: [Amps] Tubes vs. Solid State (score: 1): Author: "Jim Garland" <4cx250b@muohio.edu>; Date: Tue, 1 May 2012 11:27:31 -0600; "As I recall, water can never exceed the boiling point temperature under normal atmospheric pressure. Additional heat does not raise water temperature but causes steam and steam too never increases b; /archives//html/Amps/2012-05/msg00014.html (8,967 bytes)
2. Re: [Amps] Tubes vs. Solid State (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Tue, 01 May 2012 19:35:36 +0000; Dear all, I have been following this thread, and at some moments shuddered at what some of you opine, and assented at what others write, and several times I would almost have replied to something, to; /archives//html/Amps/2012-05/msg00021.html (16,537 bytes)
3. Re: [Amps] Tubes vs. Solid State (score: 1): Author: Al Kozakiewicz <akozak@hourglass.com>; Date: Tue, 1 May 2012 15:48:28 -0400; Manfred, If you don't mind, could you briefly describe your cooling system? Is it tap water through the heatsink straight to the sewer or a closed loop? If the latter, could you please describe the c; /archives//html/Amps/2012-05/msg00022.html (17,402 bytes)
4. [Amps] Tubes vs. Solid State (score: 1): Author: "Adrian" <vk4tux@bigpond.com>; Date: Wed, 2 May 2012 05:59:03 +1000; "As I recall, water can never exceed the boiling point temperature under normal atmospheric pressure. That's true at any pressure, only the boiling point varies with the pressure. Additional heat doe; /archives//html/Amps/2012-05/msg00023.html (10,653 bytes)
5. Re: [Amps] Tubes vs. Solid State (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Tue, 01 May 2012 20:37:15 +0000; Al, A bucket under the desk, holding some 20 liters of water. A small submersible AC powered pump in the bucket, the kind sold in home improvement stores for decorative indoor fountains. Plain half-i; /archives//html/Amps/2012-05/msg00029.html (9,596 bytes)
6. Re: [Amps] Tubes vs. Solid State (score: 1): Author: "John Lyles" <jtml@losalamos.com>; Date: Tue, 1 May 2012 16:01:34 -0600; Manfred, thank you for your sage advice and comments. Sounds like a fun project. I am stuck working with large tube amplifiers, a career path that has somehow fallen my way, so I don't get to play wi; /archives//html/Amps/2012-05/msg00035.html (9,476 bytes)
7. Re: [Amps] Tubes vs. Solid State (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Tue, 01 May 2012 18:16:32 -0400; The point here is that even 10 liters in a system with a small radiator and fan would be more than sufficient. Extend the hoses outside the shack and one has essentially noiseless cooling *and* remo; /archives//html/Amps/2012-05/msg00037.html (11,423 bytes)
8. Re: [Amps] Tubes vs. Solid State (score: 1): Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>; Date: Tue, 01 May 2012 22:07:08 -0400; Florida? How about Michigan in the summer? Just the two big computers in my den with 750 watt power supplies struggling to keep up, will about drive you out from Mid April through September, or even; /archives//html/Amps/2012-05/msg00044.html (9,319 bytes)
9. Re: [Amps] Tubes vs. Solid State (score: 1): Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>; Date: Tue, 01 May 2012 22:39:39 -0400; IF and I have to emphasize the IF these transistors were rugged enough for prime time and I'm quite willing to take your word on the power you are getting out, the manufacturers would be jumping on t; /archives//html/Amps/2012-05/msg00045.html (17,278 bytes)
10. Re: [Amps] Tubes vs. Solid State (score: 1): Author: donroden@hiwaay.net; Date: Tue, 01 May 2012 22:01:14 -0500; http://www.youtube.com/watch?v=8ziYqjMQGEQ Don W4DNR _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2012-05/msg00046.html (8,277 bytes)
11. Re: [Amps] Tubes vs. Solid State (score: 1): Author: Pete Smith N4ZR <n4zr@contesting.com>; Date: Wed, 02 May 2012 06:44:39 -0400; Regarding vapor phase cooling, I had to smile when I read Dick's suggestion to evacuate the cooling system to 1 PSIA, lowering the boiling point to 100F. Seems like this would change everything - at; /archives//html/Amps/2012-05/msg00049.html (8,400 bytes)
12. Re: [Amps] Tubes vs. Solid State (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Wed, 2 May 2012 10:06:08 -0400; Pete, It would be great if Dick, K4XU contributed to the list on a regular basis. Now there's a guy who can add some value to the discussions here. I believe he was part of some amp designs for Alpha; /archives//html/Amps/2012-05/msg00052.html (10,176 bytes)
13. Re: [Amps] Tubes vs. Solid State (score: 1): Author: "Dave Hachadorian" <k6ll@arrl.net>; Date: Wed, 2 May 2012 07:09:49 -0700; Or, use methanol (BP=148F) or acetone (BP=133F). Dave Hachadorian, K6LL Yuma, Arizona Regarding vapor phase cooling, I had to smile when I read Dick's suggestion to evacuate the cooling system to 1 P; /archives//html/Amps/2012-05/msg00053.html (9,788 bytes)
14. Re: [Amps] Tubes vs. Solid State (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Wed, 02 May 2012 10:26:28 -0400; Yes, it would. Don't hold your breath ... all of them sere driven away by Measures and his sycophants because they refused to worship accept the heresy of nichrome. The attacks on W8JI were particul; /archives//html/Amps/2012-05/msg00054.html (11,371 bytes)
15. Re: [Amps] Tubes vs. Solid State (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Wed, 02 May 2012 10:29:13 -0400; What is the energy required for phase change? If it's too low you lose the benefit of the reduced boiling point. In addition, the vapors of both are explosive if you have a leak in the vicinity or a; /archives//html/Amps/2012-05/msg00055.html (10,602 bytes)
16. Re: [Amps] Tubes vs. Solid State (score: 1): Author: Pete Smith N4ZR <n4zr@contesting.com>; Date: Wed, 02 May 2012 11:09:14 -0400; I'm kinda glad that "rlm" has moved off this reflector (he still shows up on sb-220@yahoogroups.com), and wish W8JI and the others would come back here now that the dust has settled. 73, Pete N4ZR Th; /archives//html/Amps/2012-05/msg00056.html (12,701 bytes)
17. Re: [Amps] Tubes vs. Solid State (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Wed, 2 May 2012 14:44:20 -0400; Far from it as JI was just as brutal and others left because of him particularly the years after Rich was banned. There was also W0UN and several REAL engineers with actual degrees that were with Eim; /archives//html/Amps/2012-05/msg00072.html (13,435 bytes)
18. [Amps] Tubes vs. Solid State (score: 1): Author: "Doug Ronald" <doug@dougronald.com>; Date: Wed, 2 May 2012 12:48:13 -0700; COTS heat pipe vapor phase devices are sealed, closed loop systems which are pre-evacuated at the time of manufacture so the volatile liquid which isn't necessarily water, boils just above room tempe; /archives//html/Amps/2012-05/msg00080.html (10,022 bytes)
19. Re: [Amps] Tubes vs. Solid State (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Thu, 03 May 2012 02:34:46 +0000; Roger, and all, In fact I have been wondering about this question. The reasons I can see for commercial manufacturers not doing it this way might be both technical and commercial: - Hams are obviousl; /archives//html/Amps/2012-05/msg00097.html (26,069 bytes)
20. Re: [Amps] Tubes vs. Solid State (score: 1): Author: Tom Thompson <tlthompson@qwest.net>; Date: Wed, 02 May 2012 21:19:18 -0600; I have been following this thread with great interest. I have built two SS linear amplifiers, one at a kilowatt and one at 600 watts. Neither of these amplifiers are my designs. Both were designed by; /archives//html/Amps/2012-05/msg00098.html (31,260 bytes)

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