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21. Re: Topband: TX relays (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Thu, 9 Oct 2014 13:18:58 -0500; Ahhh yes. Thanks. I didn't think of that. :-) 73, Mike www.w0btu.com _________________ Topband Reflector Archives - http://www.contesting.com/_topband; /archives//html/Topband/2014-10/msg00043.html (9,367 bytes)
22. Re: Topband: TX relays (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Thu, 9 Oct 2014 13:29:30 -0500; A potential problem with that relay is that it is not sealed. Moisture could get in, condense, and freeze. And if ice forms in the wrong place, the relay might not operate. I've had that happen befor; /archives//html/Topband/2014-10/msg00044.html (9,377 bytes)
23. Re: Topband: TX relays (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Thu, 09 Oct 2014 12:37:05 -0700; That's your assumption, but certainly not mine. What I think most of us would appreciate are known good products for specific (or define ranges of) applications. Your observations about quality decli; /archives//html/Topband/2014-10/msg00045.html (9,950 bytes)
24. Re: Topband: TX relays (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Thu, 9 Oct 2014 21:36:36 -0400; That's your assumption, but certainly not mine. What I think most of us would appreciate are known good products for specific (or define ranges of) applications. Your observations about quality decli; /archives//html/Topband/2014-10/msg00046.html (13,402 bytes)
25. Re: Topband: TX relays (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Thu, 9 Oct 2014 21:45:30 -0400; That's your assumption, but certainly not mine. What I think most of us would appreciate are known good products for specific (or define ranges of) applications. Your observations about quality decli; /archives//html/Topband/2014-10/msg00047.html (14,363 bytes)
26. Re: Topband: TX relays (score: 1): Author: "Hardy Landskov" <n7rt@cox.net>; Date: Thu, 9 Oct 2014 19:11:19 -0700; Carl, et al, You have valid points. I have resorted, for example to making my own high power handling T/R relays using Kilovac, Jennings, and other brands of vacuum relays I can find, with my mill an; /archives//html/Topband/2014-10/msg00048.html (14,820 bytes)
27. Re: Topband: TX relays (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Thu, 9 Oct 2014 22:54:17 -0400; Between contact and coil. I just took 2 photos: http://www.w0btu.com/files/misc/Omron_relay_G2R-1-E-T130/ This is where dissection helps. We can see, from the pictures, that relay is likely a good re; /archives//html/Topband/2014-10/msg00049.html (11,118 bytes)
28. Re: Topband: TX relays (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Fri, 10 Oct 2014 05:02:27 -0500; The contacts are not gold-flashed, that's just the lighting and reflections that makes it look that way in the photos. They are a cadmium-free silver alloy. Here's the data sheet. http://www.mouser.c; /archives//html/Topband/2014-10/msg00050.html (11,767 bytes)
29. Re: Topband: TX relays (score: 1): Author: Stan Stockton <wa5rtg@gmail.com>; Date: Fri, 10 Oct 2014 06:51:39 -0500; Milt, I have built four or five "stack matches" using these relays and have been quite pleased with them. http://www.mouser.com/ProductDetail/TE-Connectivity/T92S11D22-12/?qs=%2fha2pyFadujQKxyiQ9QJsU; /archives//html/Topband/2014-10/msg00051.html (8,662 bytes)
30. Re: Topband: TX relays (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Fri, 10 Oct 2014 08:29:40 -0400; I have built four or five "stack matches" using these relays and have been quite pleased with them. http://www.mouser.com/ProductDetail/TE-Connectivity/T92S11D22-12/?qs=%2fha2pyFadujQKxyiQ9QJsU9gOmzy; /archives//html/Topband/2014-10/msg00052.html (9,652 bytes)
31. Re: Topband: TX relays (score: 1): Author: Stan Stockton <wa5rtg@gmail.com>; Date: Fri, 10 Oct 2014 08:06:41 -0500; Tom, What would be a better choice for a stack match? I'm quite sure that in the heat of a contest these things have been hot switched on rare occasion with 1500w. There was one time when I intention; /archives//html/Topband/2014-10/msg00053.html (10,669 bytes)
32. Re: Topband: TX relays (score: 1): Author: Tim Shoppa <tshoppa@gmail.com>; Date: Fri, 10 Oct 2014 09:46:23 -0400; My observation (given the large number of silver cadmium relay contacts I've seen at large contest stations, as well as more limited use at my little station) is that the large amounts of power being; /archives//html/Topband/2014-10/msg00054.html (10,134 bytes)
33. Re: Topband: TX relays (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Fri, 10 Oct 2014 11:48:30 -0400; What would be a better choice for a stack match? I'm quite sure that in the heat of a contest these things have been hot switched on rare occasion with 1500w. There was one time when I intentionally; /archives//html/Topband/2014-10/msg00055.html (13,316 bytes)
34. Re: Topband: TX relays (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Fri, 10 Oct 2014 12:11:00 -0400; During the years I was running 10-40M stacks I used 24VDC surplus DPDT relays at .50-1.00 each from All Electronics; 12 or 13A contacts if I remember and in clear plastic dust covers. These were moun; /archives//html/Topband/2014-10/msg00056.html (12,148 bytes)
35. Re: Topband: TX relays (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Fri, 10 Oct 2014 12:39:20 -0400; Tom still hasnt answered why there is only a $10 price difference between the RCS-4 and the -8V yet users of the -8V are getting raped for replacement relays. I don't know why any public forum allows; /archives//html/Topband/2014-10/msg00057.html (8,365 bytes)
36. Re: Topband: TX relays (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Fri, 10 Oct 2014 12:41:21 -0400; Hi Mike, The contacts are not gold-flashed, that's just the lighting and reflections that makes it look that way in the photos. They are a cadmium-free silver alloy. Here's the data sheet. Silver is; /archives//html/Topband/2014-10/msg00058.html (12,806 bytes)
37. Re: Topband: TX relays (score: 1): Author: Paul Baldock <pbaldock@frontier.com>; Date: Fri, 10 Oct 2014 11:13:14 -0700; One solution to the receiving problem when using high current relays may be to have dc current (eg 100mA) pass through the contact in RX. This would be particularly easy to implement when the antenna; /archives//html/Topband/2014-10/msg00059.html (10,074 bytes)
38. Re: Topband: TX relays (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Fri, 10 Oct 2014 14:34:54 -0400; One solution to the receiving problem when using high current relays may be to have dc current (eg 100mA) pass through the contact in RX. This would be particularly easy to implement when the antenna; /archives//html/Topband/2014-10/msg00060.html (10,638 bytes)
39. Re: Topband: TX relays (score: 1): Author: Bill Wichers <billw@waveform.net>; Date: Fri, 10 Oct 2014 19:35:19 +0000; That is called "sealing current". It's been used in the telecom industry for ages. The spec is <20mA though, and you can get by with only a few mA. It helps to prevent various corrosive forces from d; /archives//html/Topband/2014-10/msg00061.html (11,250 bytes)
40. Re: Topband: TX relays (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Fri, 10 Oct 2014 20:35:42 -0400; Tom still hasnt answered why there is only a $10 price difference between the RCS-4 and the -8V yet users of the -8V are getting raped for replacement relays. I don't know why any public forum allows; /archives//html/Topband/2014-10/msg00062.html (9,282 bytes)

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