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Total 15 documents matching your query.

1. [Amps] AC to DC (score: 1): Author: "Rich" <rdjmgmt@socket.net>; Date: Sat, 28 Jan 2006 21:43:13 -0600; I was at a hamfest today and checking out the relay setup in some amps. The relays are no better in size that some 10amp relays I have. If I remember some one noted the DC voltage that could be used; /archives//html/Amps/2006-01/msg00655.html (6,321 bytes)
2. Re: [Amps] AC to DC (score: 1): Author: Bill Turner <dezrat1242@ispwest.com>; Date: Sat, 28 Jan 2006 20:16:34 -0800; ORIGINAL MESSAGE: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ I wish I could remember exactly, but years ago I heard some advice against using DC on AC relays. It had to do with the core gettin; /archives//html/Amps/2006-01/msg00660.html (7,425 bytes)
3. Re: [Amps] AC to DC (score: 1): Author: John Popelish <jpopelish@rica.net>; Date: Sat, 28 Jan 2006 23:49:41 -0500; Yes, DC relays often have a thin film of nonmagnetic material between the coil core and the armature (the iron part it attracts), to keep the remnance from getting strong enough to hold the relay clo; /archives//html/Amps/2006-01/msg00662.html (8,074 bytes)
4. Re: [Amps] AC to DC (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Sat, 28 Jan 2006 23:55:25 -0500; Johns correct. I'm not for sure what the relay looks like, but some had a set screw on the armature which prevented it from fully closing. It was set for a paper thin air gap. A small pieace of paper; /archives//html/Amps/2006-01/msg00664.html (9,082 bytes)
5. Re: [Amps] AC to DC (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Sun, 29 Jan 2006 16:44:54 -0500; A DC relay is wound with enough resistance to withstand the applied voltage. An AC relay depends partly on the inductance presented by the coil for its impedance to AC. That same coil on DC may not; /archives//html/Amps/2006-01/msg00701.html (8,731 bytes)
6. Re: [Amps] AC to DC (score: 1): Author: John Popelish <jpopelish@rica.net>; Date: Sun, 29 Jan 2006 17:00:02 -0500; Any AC relay will hold in with some DC current that will not overheat the coil. DC is more efficient at producing attractive force than AC, because AC goes through zero twice a cycle. The big differe; /archives//html/Amps/2006-01/msg00702.html (8,114 bytes)
7. Re: [Amps] AC to DC (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Sun, 29 Jan 2006 17:11:47 -0500; Yes, but my point is that an AC relay operated on DC with the DC voltage the same as the AC voltage rating, the relay may overheat. 73 Gary K4FMX _______________________________________________ Amps; /archives//html/Amps/2006-01/msg00703.html (8,488 bytes)
8. Re: [Amps] AC to DC (score: 1): Author: John Popelish <jpopelish@rica.net>; Date: Sun, 29 Jan 2006 17:46:58 -0500; Sorry, I missed what you you were implying. Of course, any AC relay will pull in with a DC voltage lower than its rated AC voltage, and will almost certainly overheat if operated with DC voltage equa; /archives//html/Amps/2006-01/msg00706.html (7,537 bytes)
9. Re: [Amps] AC to DC (score: 1): Author: "Rich" <rdjmgmt@socket.net>; Date: Mon, 30 Jan 2006 11:52:48 -0600; Message: 1 Date: Sun, 29 Jan 2006 17:46:58 -0500 From: John Popelish <jpopelish@rica.net> Subject: Re: [Amps] AC to DC To: Amps@contesting.com Gary Schafer wrote: Sorry, I missed what you you were im; /archives//html/Amps/2006-01/msg00724.html (8,174 bytes)
10. Re: [Amps] AC to DC (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Mon, 30 Jan 2006 12:59:02 -0500; I wouldn't worry about any hum. The AC voltage will be fine to operate the relays. If you do want to run them on DC advice has been given to do that. 73 Gary K4FMX __________________________________; /archives//html/Amps/2006-01/msg00726.html (9,748 bytes)
11. Re: [Amps] AC to DC (score: 1): Author: "David C. Hallam" <dhallam@rapidsys.com>; Date: Mon, 30 Jan 2006 13:24:37 -0500; Sometimes knowledge from the past is forgotten. Please refer to Bill Orr's Radio Handbook. I am looking at 1970 18th Edition, page 436, DC Relay Operation. Bill states that an AC relay will operate w; /archives//html/Amps/2006-01/msg00728.html (9,830 bytes)
12. Re: [Amps] AC to DC (score: 1): Author: Bill Turner <dezrat1242@ispwest.com>; Date: Mon, 30 Jan 2006 18:49:44 -0800; ORIGINAL MESSAGE: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ I'd be careful of generic statements like that. You're likely to come across a relay where that is not true. Use it as a starting p; /archives//html/Amps/2006-01/msg00751.html (8,111 bytes)
13. Re: [Amps] AC to DC (score: 1): Author: "Barrie Smith" <barrie@centric.net>; Date: Mon, 30 Jan 2006 20:06:06 -0700; All (quite a number, actually) of the 120 volt AC relays I've tried and tested have not closed at 12 volts DC, not even with help. Many will close at about 18 to 20 volts, some needing a nudge. All; /archives//html/Amps/2006-01/msg00752.html (8,591 bytes)
14. Re: [Amps] AC to DC (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Tue, 31 Jan 2006 00:13:29 -0500; I didn't have time today, but try to tomorrow, to post what Struthers & Dun says. I have a book here they wrote on relay engineering which discuss this. I promised the original poster I'd do it, but; /archives//html/Amps/2006-01/msg00754.html (9,633 bytes)
15. Re: [Amps] AC to DC (score: 1): Author: R.Measures <r@somis.org>; Date: Tue, 31 Jan 2006 03:56:53 -0800; I have found the same, Barrie. Richard L. Measures, AG6K, 805.386.3734. www.somis.org _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com; /archives//html/Amps/2006-01/msg00764.html (8,959 bytes)

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