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Total 33 documents matching your query.

21. [AMPS] Relays hanging up (score: 1): Author: norsan@bright.net (Norman Hockler); Date: Sat, 12 Aug 2000 12:50:25 -0400; It's called "contact wetting" Wetting can be obtained in two ways. 1. A difference of potential greater than about 8 volts across the contacts will break down the surface film and current will flow.; /archives//html/Amps/2000-08/msg00243.html (11,022 bytes)
22. [AMPS] Relays hanging up (score: 1): Author: N6BUU@aol.com (N6BUU@aol.com); Date: Sat, 12 Aug 2000 12:58:41 EDT; since we are now on the subject of relays, I have a rig (ft102) that had relay problems from the get go. has anybody ever explained what the problems were with these relays??? HANK -- FAQ on WWW: htt; /archives//html/Amps/2000-08/msg00244.html (8,363 bytes)
23. [AMPS] Relays hanging up (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Sat, 12 Aug 2000 13:05:39 -0400; Is it a three pole relay? 73, Tom W8JI w8ji@contesting.com -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Pro; /archives//html/Amps/2000-08/msg00245.html (8,824 bytes)
24. [AMPS] Relays hanging up (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Sat, 12 Aug 2000 13:05:39 -0400; You were there Rich? When did you work for the telephone company in Europe? You were there? Depends on how much you mean by magnetized. Certainly all iron materials have ability to retain SOME amoun; /archives//html/Amps/2000-08/msg00246.html (9,784 bytes)
25. [AMPS] Relays hanging up (score: 1): Author: kh7m@hsa-kauai.net (Jim Reid); Date: Sat, 12 Aug 2000 08:38:11 -1000; How about a Guardian 1365PC, 12 vdc, DPDT unit. 73, Jim, KH7M -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com; /archives//html/Amps/2000-08/msg00247.html (8,524 bytes)
26. [AMPS] Relays hanging up (score: 1): Author: 2@vc.net (measures); Date: Sat, 12 Aug 2000 12:13:31 -0700; Open frame relays are not fast enough to avoid hotswitching with a modern radio. The parts for the high speed switching mod on my Web site cost less than $60 total. See Figure 7B. No user has report; /archives//html/Amps/2000-08/msg00249.html (12,785 bytes)
27. [AMPS] Relays hanging up (score: 1): Author: 2@vc.net (measures); Date: Sat, 12 Aug 2000 12:13:30 -0700; ? Mr. Rauch plays the Duhhh Card. ? The sticking relay was in one of my amplifiers. ? magnetized enough to cause the relay to stick. You said "no (magnetic) flux storage". later, Tom. - Rich..., 805; /archives//html/Amps/2000-08/msg00250.html (9,670 bytes)
28. [AMPS] Relays hanging up (score: 1): Author: 2@vc.net (measures); Date: Sat, 12 Aug 2000 12:17:48 -0700; ... fast enough to switch an amplifier that is driven by a TS-830S. For faster radios, it takes faster relays. cheers, Jim - Rich..., 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http://; /archives//html/Amps/2000-08/msg00251.html (8,221 bytes)
29. [AMPS] Relays hanging up (score: 1): Author: kc4slk@csrlink.net (Mike Sawyer); Date: Sat, 12 Aug 2000 20:22:42 -0400; I don't know if it was residual magnetism, but I had some I used when I was in the Navy that had a habit of staying closed. We thought it was from "contact welding" but every one we opened, show bare; /archives//html/Amps/2000-08/msg00260.html (9,497 bytes)
30. [AMPS] Relays hanging up (score: 1): Author: 2@vc.net (measures); Date: Sun, 13 Aug 2000 03:42:27 -0700; I figure this is residual magnetism. If reversing the coil wires cures the sticking problem, it proves it. later, Mike - Rich..., 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http://www.; /archives//html/Amps/2000-08/msg00263.html (9,136 bytes)
31. [AMPS] Relays hanging up (score: 1): Author: dbowker@mail.sjv.net (Dave Bowker); Date: Sun, 13 Aug 2000 08:16:48 -0400; The solenoid in a vacuum relay is simply an electromagnet. There are several factors which can cause undesirable dynamic characteristics of any electromagnet, notably (1) heating of the solenoid, (2); /archives//html/Amps/2000-08/msg00265.html (11,299 bytes)
32. [AMPS] Relays hanging up (score: 1): Author: dlawson@maine.rr.com (david lawson); Date: Sun, 13 Aug 2000 10:07:51 -0400; i had a t/r relay stick in a base station radio. problem was the +12 regulator for driving the relays had failed and was putting +19 on the coils. residual magnetism, yes. caused by too much field to; /archives//html/Amps/2000-08/msg00266.html (8,001 bytes)
33. [AMPS] Relays hanging up (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 14 Aug 2000 10:24:53 +0100; Exactly what I've done on my FT102 to cure the renowned relay problem. The technique was well known in the days of Strowger telephone exchanges. The telephone relays used in the old British Post Offi; /archives//html/Amps/2000-08/msg00282.html (8,394 bytes)

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