Mail Archive Search: <+subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[AMPS\]\s+blowers\s*$/>

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[AMPS\]\s+blowers\s*$/: 40 ]

Total 40 documents matching your query.

1. [Amps] Blowers (score: 1): Author: g8gsq@qsl.net (Steve Thompson); Date: Tue, 5 Mar 2002 07:57:40 -0000; I recommend http://www.david-kirkby.co.uk/ham/fanpaper.pdf as bedtime reading. The mathematical treatment might appear offputting, but at the end it distills out to some basic equations which give a; /archives//html/Amps/2002-03/msg00071.html (7,436 bytes)
2. [Amps] Blowers (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Tue, 5 Mar 2002 00:42:15 -0800; ? A blower is too large when it blows the tube out of the socket. - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, www.vcnet.com/measures. end; /archives//html/Amps/2002-03/msg00072.html (7,745 bytes)
3. [Amps] Blowers (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Tue, 5 Mar 2002 10:47:07 -0000; My sentiments,too, but a couple of years back, somebody here said that he'd worked at a broadcast station where the blower revs had been turned up and tube life went for a chop because of overheating; /archives//html/Amps/2002-03/msg00074.html (8,046 bytes)
4. [Amps] Blowers (score: 1): Author: w2fca@qsl.net (Frank Ayers); Date: Tue, 5 Mar 2002 05:24:17 -0800; Hi all - A blower related question - I have a Dayton 4C006 blower. The published ratings for it start at a static pressure of 1/2 in and go up to 1.2 in. there is a note in the 0 inch static pressure; /archives//html/Amps/2002-03/msg00078.html (7,299 bytes)
5. [Amps] Blowers (score: 1): Author: jstrohm@texas.net (Jim Strohm); Date: Tue, 5 Mar 2002 08:38:44 -0600; "Frank Ayers" <w2fca@qsl.net> asks Once you stall the blower, there's no airflow to cool the motor, and it will overheat relatively quickly. If you plot the product of air flow and backpressure you s; /archives//html/Amps/2002-03/msg00082.html (7,832 bytes)
6. [Amps] Blowers (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Tue, 5 Mar 2002 06:53:37 -0800; ? Typical centrifugal blower design is such that that under a critical delivery rate, air pressure drops due to cavitation. In other words, it may take some holes in the chassis (preferably under th; /archives//html/Amps/2002-03/msg00085.html (8,160 bytes)
7. [Amps] Blowers (score: 1): Author: gschafer@mediaone.net (Gary Schafer); Date: Tue, 05 Mar 2002 10:23:21 -0500; You asked about overload at "0 static pressure". That is where the motor is working hardest moving the most air. If you hold your hand over the outlet of the blower choking off all air flow the blowe; /archives//html/Amps/2002-03/msg00089.html (8,026 bytes)
8. [Amps] Blowers (score: 1): Author: gschafer@mediaone.net (Gary Schafer); Date: Tue, 05 Mar 2002 10:48:14 -0500; There is an excellent article titled "Forced-air cooling of tubes" by William Orr in the September 1967 issue of QST Page 20. He discusses air requirements for various tubes and blower sizes. Very wo; /archives//html/Amps/2002-03/msg00091.html (8,935 bytes)
9. [Amps] Blowers (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Tue, 5 Mar 2002 08:04:24 -0800; ? Maximum load on a blower is with free flow delivery. During a cavitation condition, the airflow stalls and, since the motor is not working as hard, it speeds up slightly. Also, the typical motor h; /archives//html/Amps/2002-03/msg00093.html (9,192 bytes)
10. [Amps] Blowers (score: 1): Author: jstrohm@texas.net (Jim Strohm); Date: Tue, 5 Mar 2002 10:30:11 -0600; Richard <2@mail.vcnet.com> says -- I said >>Once you stall the blower, there's no airflow to cool the motor, and it Yes. With no place for the "cooled" air to go, it stays at the motor. With a no-loa; /archives//html/Amps/2002-03/msg00095.html (9,045 bytes)
11. [Amps] Blowers (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Tue, 5 Mar 2002 12:45:50 -0800; ? The motor's radial-wheel cooling system does not stall at all. ? Cavitation is largely caused by too much restriction to flow. - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, www.vcnet.com/me; /archives//html/Amps/2002-03/msg00103.html (7,955 bytes)
12. [AMPS] Blowers (score: 1): Author: k7fm@teleport.com (Lamb); Date: Sun, 13 May 2001 17:16:29 -0700; "? You don't seem to get it, Jon. A high-speed centrifugal blower is required to overcome the back-pressure in the SK-510 air system socket. High-speed blowers are hard to live with, scarce and expen; /archives//html/Amps/2001-05/msg00240.html (7,555 bytes)
13. [AMPS] Blowers (score: 1): Author: kc5ajx@hotmail.com (Rick Bullon); Date: Mon, 14 May 2001 00:35:44 -0000; If the fan keeps the vox open all the time then the vox needs to be adjusted so the fan doesn't trip the vox. In your example it is a nox ( noise operated transmit) not a vox. If you don't adjust th; /archives//html/Amps/2001-05/msg00242.html (7,748 bytes)
14. [AMPS] Blowers (score: 1): Author: 2@vc.net (measures); Date: Sun, 13 May 2001 18:56:25 -0700; I agree, Rick. High-speed PTT is work. To me, high-speed VOX operation is relaxing. cheers - Rich..., 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amps Subm; /archives//html/Amps/2001-05/msg00243.html (7,836 bytes)
15. [AMPS] Blowers (score: 1): Author: 2@vc.net (measures); Date: Sun, 13 May 2001 18:56:28 -0700; ? What is the pressure drop across the socket, Colin? - Rich..., 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administ; /archives//html/Amps/2001-05/msg00244.html (7,789 bytes)
16. [AMPS] Blowers (score: 1): Author: wb4mnf@atl.org (Bob Duckworth); Date: Mon, 14 May 2001 07:05:44 -0400; No No No Colin, You send FEC digital data. Very low rate while you are speaking so the listener doesnt hear it and you increase the rate to maximize power/bandwidth utilization during pauses. Aviatio; /archives//html/Amps/2001-05/msg00250.html (7,664 bytes)
17. [AMPS] Blowers (score: 1): Author: k7fm@teleport.com (Lamb); Date: Mon, 14 May 2001 06:08:55 -0700; "? What is the pressure drop across the socket, Colin?" I did not measure it. I made the assumption Bill knew what he was talking about and my 4-1000 keeps cool. I suppose I should measure it and wil; /archives//html/Amps/2001-05/msg00251.html (7,089 bytes)
18. [AMPS] Blowers (score: 1): Author: 2@vc.net (measures); Date: Mon, 14 May 2001 07:39:59 -0700; ? ... or -- you could measure envelope temperatures with an IR thermometer. - Rich..., 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@c; /archives//html/Amps/2001-05/msg00259.html (7,252 bytes)
19. [AMPS] Blowers (score: 1): Author: w2fca@qsl.net (w2fca@qsl.net); Date: Fri, 26 May 2000 05:00:20 -0700; I'm building amps for 2 and 6 using a 4CX800. I bought a blower from Grainger, # 4C006 that runs at 2200 RPM and shows ratings of 82 CFM at 1 in. pressure and 42 CFM at 1.2 in. pressure. I've tried; /archives//html/Amps/2000-05/msg00295.html (7,492 bytes)
20. [AMPS] Blowers (score: 1): Author: 2@vc.net (measures); Date: Fri, 26 May 2000 07:50:35 -0700; ? Excellent idea, Frank. I have yet to see a blower that delivers the manufacturer's claimed airflow. There is no substitute for the cardboard-box / socket / tube / manometer test. In my experiences; /archives//html/Amps/2000-05/msg00298.html (7,903 bytes)

Current List: 1 - 20
Page: [1] [2]