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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[Amps\]\s+Q\:\s+Chimneys\s+for\s+3\-500\/4\-400\?\?\s*$/: 16 ]

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1. [Amps] Q: Chimneys for 3-500/4-400?? (score: 1): Author: bearlabs@netzero.net (BEAR); Date: Tue, 03 Dec 2002 12:27:31 -0500; Wondering if anyone can suggest an inexpensive source for chimneys for the 3-400/4-400 type tubes? Especially cheap imports. :- ) Or if anyone in the US has a pair they want to blow out... Or if anyo; /archives//html/Amps/2002-12/msg00040.html (7,797 bytes)
2. [Amps] Q: Chimneys for 3-500/4-400?? (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Tue, 3 Dec 2002 12:01:49 -0600; Years ago, I would just go down to my local "Mom and Pop" hardware store and purchase chimneys for a Coleman lantern......great fit!!! I have no idea if Coleman is still making these.; /archives//html/Amps/2002-12/msg00041.html (8,658 bytes)
3. [Amps] Q: Chimneys for 3-500/4-400?? (score: 1): Author: 2@vc.net (Rich); Date: Tue, 3 Dec 2002 10:05:08 -0800; The work-around is to plagiarize the split-chassis transverse 6" fan cooling system used in the Heath SB-220. The glass envelopes will run way cooler, the amp will run quieter, and there will be no e; /archives//html/Amps/2002-12/msg00042.html (8,661 bytes)
4. [Amps] Q: Chimneys for 3-500/4-400?? (score: 1): Author: bearlabs@netzero.net (BEAR); Date: Tue, 03 Dec 2002 13:49:07 -0500; Nah nah... no thanks... I think the issue is the temperature of the plate seal and the pins seals... I'd also prefer to have the same temp air on all sides of the tube. You should read the descriptio; /archives//html/Amps/2002-12/msg00043.html (9,753 bytes)
5. [Amps] Q: Chimneys for 3-500/4-400?? (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Tue, 3 Dec 2002 11:06:10 -0800; Bear (?), I've had lots of Henry 3-500Z amps over many years, and they do use a pressurized chassis and chimneys, just like Eimac used to say to do...but the tubes didn't run cooler as a result (notw; /archives//html/Amps/2002-12/msg00044.html (12,735 bytes)
6. [Amps] Q: Chimneys for 3-500/4-400?? (score: 1): Author: k7fm@teleport.com (COLIN LAMB); Date: Tue, 3 Dec 2002 11:20:13 -0800; Coleman still makes them and they althoiugh they have gone from cheap to inexpensive. The real cost is all the neat other stuff you buy when you go to buy the lantern chimneys. Colin K7FM To: <amps@c; /archives//html/Amps/2002-12/msg00045.html (10,245 bytes)
7. [Amps] Q: Chimneys for 3-500/4-400?? (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Tue, 3 Dec 2002 13:43:29 -0600; Amen, Colin! Gone are the days when I could stop off at W.W. Grainger and pick up a nice blower to go with the chimneys for $14.95. (((73))) Phil, K5PC; /archives//html/Amps/2002-12/msg00046.html (8,403 bytes)
8. [Amps] Q: Chimneys for 3-500/4-400?? (score: 1): Author: 2@vc.net (Rich); Date: Tue, 3 Dec 2002 13:23:04 -0800; Gone with the wind. To meet Eimac's pressure spec for the air system socket one needs a high-pressure blower -- something that I have never seen in an inexpensive blower. High pressure blowers typic; /archives//html/Amps/2002-12/msg00047.html (8,705 bytes)
9. [Amps] Q: Chimneys for 3-500/4-400?? (score: 1): Author: 2@vc.net (Rich); Date: Tue, 3 Dec 2002 13:28:59 -0800; Amen, Steve. Not a guess. The airflow in feet/minute is typically higher with transverse cooling. That, plus the upward airflow is more restricted. and a simple aerodynamic principal. - Rich..., 805; /archives//html/Amps/2002-12/msg00048.html (10,073 bytes)
10. [Amps] Q: Chimneys for 3-500/4-400?? (score: 1): Author: 2@vc.net (Rich); Date: Tue, 3 Dec 2002 13:29:08 -0800; Would the fins on the anode/plate radiator work better with vertical airflow or horizontal airflow? - Henry Radio, Co. uses glass chimneys with noisy centrifugal blowers. I too scoffed at Heath's co; /archives//html/Amps/2002-12/msg00049.html (11,356 bytes)
11. [Amps] Q: Chimneys for 3-500/4-400?? (score: 1): Author: bearlabs@netzero.net (BEAR); Date: Tue, 03 Dec 2002 16:39:27 -0500; Depends upon the anode radiator design! And the actual airflow and air temp before the air reaches the radiator/cap. Right - I'm using a much quieter blower... the old one is long gone anyhow. You ha; /archives//html/Amps/2002-12/msg00050.html (12,830 bytes)
12. [Amps] Q: Chimneys for 3-500/4-400?? (score: 1): Author: 2@vc.net (Rich); Date: Tue, 3 Dec 2002 15:40:55 -0800; The fins extend horizontalally. If the fins extended vertically, they could short against the top cover to the rf deck in many amplifiers. With an air-system socket + chimney, the air is preheated b; /archives//html/Amps/2002-12/msg00051.html (14,512 bytes)
13. [Amps] Q: Chimneys for 3-500/4-400?? (score: 1): Author: balmemo@sympatico.ca (Bert Almemo); Date: Tue, 3 Dec 2002 19:38:12 -0800; Hi Bear, I agree with Rich. Have a 220 myself, running almost full power after 30 years and original 3-500Z tubes - print NOT brown. If you want DIY chimneys check http://www.qsl.net/sdxa/homebrew.ht; /archives//html/Amps/2002-12/msg00052.html (15,338 bytes)
14. [Amps] Q: Chimneys for 3-500/4-400?? (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.co.uk (Ian White, G3SEK); Date: Wed, 4 Dec 2002 00:03:36 +0000; [...] A while ago, I made some rough measurements on the 3-500Z in an SB-1000, using thermal-sensitive labels on the glass. That amp has a 6in Muffin-type fan blowing across the tube, with the air ou; /archives//html/Amps/2002-12/msg00054.html (9,216 bytes)
15. [Amps] Q: Chimneys for 3-500/4-400?? (score: 1): Author: peter.chadwick@Zarlink.Com (peter.chadwick@Zarlink.Com); Date: Wed, 4 Dec 2002 08:22:41 +0000; One military transmitter used QY4-250's (which are very similar to 4-250A's, but without the metal base ring) and thus not that different to 4-400's, but only blew from the top - a big (8inch diamete; /archives//html/Amps/2002-12/msg00055.html (8,305 bytes)
16. [Amps] Q: Chimneys for 3-500/4-400?? (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Wed, 4 Dec 2002 07:46:13 -0800; Hi Ian, Yes, it would be imprudent to operate the amplifier without its cover installed, just as it would be to operate a pressurized chassis (blower, air system socket, chimneys) without its bottom; /archives//html/Amps/2002-12/msg00068.html (9,731 bytes)

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