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1. [AMPS] Airflow (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Sat, 23 May 1998 07:17:38 +0100; Is it permissible to blow air through 3CX800 in the reverse direction to 'normal', i.e. in at the top and out at the bottom of the anode? There's obviously an effect on seal temperatures, but if thes; /archives//html/Amps/1998-05/msg00516.html (7,037 bytes)
2. [AMPS] Airflow (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Sat, 23 May 1998 05:56:57 +0000; To: <amps@contesting.com> It is possible, and somtimes done. No problems. You just need a lot more airflow than conventional cooling. Eimac gives both specs in the data sheet. 73, Tom W8JI w8ji.tom@M; /archives//html/Amps/1998-05/msg00517.html (8,050 bytes)
3. [AMPS] Airflow (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Sat, 23 May 1998 09:18:41 +0100; The only major problem I can think of is the difficulty of getting the hot air out, without heating the whole box, the output tuned circuit and the base of the tube in particular. The cooling of the; /archives//html/Amps/1998-05/msg00520.html (8,188 bytes)
4. [AMPS] Airflow (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Mon, 25 May 1998 08:15:30 +0100; Thanks, Tom. I'll check it out; I have a data sheet but I can't get near the cabinet at the moment. I'm sure that somewhere in the 8873/4/5 or 3CX800 data sheets there's a specific comment about the; /archives//html/Amps/1998-05/msg00557.html (8,584 bytes)
5. [AMPS] Airflow (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Mon, 25 May 1998 08:22:17 +0000; To: <amps@contesting.com> I just looked at the 3CX800, and it is not one of the tubes with data for reverse cooling. With other tubes, the change in airflow is minor, but there is a slight increase r; /archives//html/Amps/1998-05/msg00559.html (7,657 bytes)
6. [AMPS] Airflow (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Sat, 7 Jun 1997 09:06:32 +0000; That's correct Carl. It takes more airflow to maintain the same seal temperatures because much of the airflow is wasted. Most of the air misses the tubes. The problem is exactly like a car going thr; /archives//html/Amps/1997-06/msg00085.html (10,314 bytes)
7. [AMPS] AIRFLOW (score: 1): Author: KR4DAGRIP@aol.com (KR4DAGRIP@aol.com); Date: Wed, 26 Mar 1997 08:15:41 -0500 (EST); << Put your hand over the vent every few minutes...if it feels warmer than when you are rag-chewing on SSB or CW, turn it down some more. These things aren't broadcast rigs. And if they were, most of; /archives//html/Amps/1997-03/msg00241.html (8,376 bytes)
8. [AMPS] AIRFLOW (score: 1): Author: w8jitom@worldnet.att.net (Tom Rauch (W8JI)); Date: Wed, 26 Mar 1997 10:55:33 -0500; The problem with the idea of watching exhaust temp is we aren't worried about the exhaust air. The true concern is tube seal and component temperature. Measuring the exhaust flow temperature actually; /archives//html/Amps/1997-03/msg00245.html (7,653 bytes)
9. [AMPS] AIRFLOW (score: 1): Author: ab4ru@stc.net (Ron Hooper); Date: Thu, 27 Mar 1997 00:06:26 +0000; Tom is right about the air temp not being a good place to monitor. What you really want to monitor is the tube temperture especially the seals. Depending on the tube and the cost, I could probably co; /archives//html/Amps/1997-03/msg00253.html (8,553 bytes)
10. [AMPS] AIRFLOW (score: 1): Author: ve6jy@freenet.edmonton.ab.ca (Don Moman); Date: Wed, 26 Mar 1997 18:49:25 -0700 (MST); I have used the max/min Radio Shack type thermometers in the airflow on some of my amps...These only go up to 160 or 170 F - not really high enough. They go off scale with the Henry 5-K very quickly,; /archives//html/Amps/1997-03/msg00256.html (7,559 bytes)

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