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21. Re: [Amps] Transformer question (score: 1): Author: "Robert Bonner" <rbonner@qro.com>; Date: Sun, 8 Jul 2007 20:27:58 -0500; Oh my goodness here we go again discussing how to put a plug on a ham amplifier. After having worked in the past as a professional electrician not a ham wiring his own rig I have found: 240V circuits; /archives//html/Amps/2007-07/msg00097.html (14,244 bytes)
22. Re: [Amps] Transformer question (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Sun, 8 Jul 2007 20:46:46 -0500; Before Carl goes out and looks at his stove or dryer and comes back and tells you that they only have 3 prong plugs on them; The old NEC DID allow a few dedicated circuits like dryers and stoves to h; /archives//html/Amps/2007-07/msg00099.html (16,447 bytes)
23. Re: [Amps] Transformer question (score: 1): Author: "Robert Bonner" <rbonner@qro.com>; Date: Sun, 8 Jul 2007 20:55:17 -0500; Yes Gary, they revamp that code every few years... Things like Arc Fault breakers and crap like that. Before Carl goes out and looks at his stove or dryer and comes back and tells you that they only; /archives//html/Amps/2007-07/msg00100.html (16,804 bytes)
24. Re: [Amps] Transformer question (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Sun, 8 Jul 2007 22:00:58 -0400; Carl, That's correct and not just for appliances. Here's one real world potential problem: If a 120V blower is used in a 240 VAC amp (e.g., older Alpha & Henry), and one lead of the blower is connec; /archives//html/Amps/2007-07/msg00101.html (11,324 bytes)
25. Re: [Amps] Transformer question (score: 1): Author: Geert Jan de Groot <pe1hzg@xs4all.nl>; Date: Mon, 09 Jul 2007 23:22:43 +0200; I'm obviously no expert in the American electrical code (other than some of the stunts I see posted would be definite no-go tricks over here). On the other hand, 230 volts is all we have, we do get t; /archives//html/Amps/2007-07/msg00127.html (9,712 bytes)
26. Re: [Amps] Transformer question (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Mon, 09 Jul 2007 15:56:29 -0700; Tom's reading of NEC is the same as mine. However -- I have heard that there used to be some exception for certain heavy appliances. If that execption exists, perhaps someone could cite the specific; /archives//html/Amps/2007-07/msg00129.html (9,569 bytes)
27. Re: [Amps] Transformer question (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Mon, 9 Jul 2007 21:11:35 -0400; Jim, It's my understanding the exposed case of large appliances was never supposed to be tied to the neutral, but it became so commonly misused it appeared many places. They solved that problem in t; /archives//html/Amps/2007-07/msg00131.html (9,736 bytes)
28. Re: [Amps] Transformer question (score: 1): Author: "Robert Bonner" <rbonner@qro.com>; Date: Mon, 9 Jul 2007 20:29:35 -0500; That's an interesting point Jim, However I think the spreading out of multiple paths is the electrical shock you get on the soft part of your arm when you're leaning against stuff and the SHOCKED DEA; /archives//html/Amps/2007-07/msg00132.html (11,778 bytes)
29. Re: [Amps] Transformer question (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Mon, 9 Jul 2007 20:39:13 -0500; I just bought one of those 50A sockets for my welder last year from home depot. Sold as a range outlet. They still had the 3 wire cords for the range there too. It is my understanding that the 3 wire; /archives//html/Amps/2007-07/msg00133.html (12,031 bytes)
30. Re: [Amps] Transformer question (score: 1): Author: "Robert Bonner" <rbonner@qro.com>; Date: Mon, 9 Jul 2007 22:49:49 -0500; Something to think about. Like I said a few posts ago, the NEC is updated every few years. They come up with new "Ideas" and ram them down our throats. The Ovens, ranges, dryers whatever are old inst; /archives//html/Amps/2007-07/msg00134.html (16,355 bytes)
31. Re: [Amps] Transformer question (score: 1): Author: "jeremy-ca" <km1h@jeremy.mv.com>; Date: Tue, 10 Jul 2007 12:01:12 -0400; Thanks Gary, that explains a lot of the confusion I had. I built this house in 89 and the NEC in force was the 1987 version. That clearly showed the neutral and ground tied together. I also checked m; /archives//html/Amps/2007-07/msg00154.html (14,360 bytes)
32. Re: [Amps] Transformer question (score: 1): Author: "jeremy-ca" <km1h@jeremy.mv.com>; Date: Tue, 10 Jul 2007 12:07:59 -0400; I preserved the knob and tube (non functional) in the basement of the original part of my present home; that section was built in 1836. I dont even know the name of some of the stuff I pulled out of; /archives//html/Amps/2007-07/msg00155.html (19,012 bytes)
33. Re: [Amps] Transformer question (score: 1): Author: "Robert Bonner" <rbonner@qro.com>; Date: Tue, 10 Jul 2007 18:35:13 -0500; **Thanks to the many that offered constructive comments and not condescending insults. Yeah well everybody on this reflector keeps all the nasty stuff to themselves. You're ok unless the vox is on. H; /archives//html/Amps/2007-07/msg00175.html (15,384 bytes)
34. [Amps] Transformer Question (score: 1): Author: "Steve Cook" <sccook1@cox.net>; Date: Fri, 20 Feb 2009 18:39:59 -0700; Team, Other than Harbach / Dahl / Magcap, can you recommend a reasonably priced custom transformer house that can wind single phase hypersil cores in the 25/30KVA (300Lb class). Been looking around a; /archives//html/Amps/2009-02/msg00606.html (6,394 bytes)
35. [Amps] Transformer question (score: 1): Author: George <K4GVT@comcast.net>; Date: Fri, 26 Nov 2010 15:33:12 -0500; Greetings, I have a high voltage transformer with the following information on it: PT-1260 HTS-9286 9960805 It was used in an home brew amp that has been cannibalized. I'm trying to identify the sour; /archives//html/Amps/2010-11/msg00490.html (10,269 bytes)
36. [Amps] Transformer question (score: 1): Author: Charles Bibb <zedkay@telepak.net>; Date: Sat, 12 May 2012 16:58:43 -0500; Since 1985 I've been using a single-3-500Z HB amp. that uses in the HV PS a hermetically sealed Collins transformer that I'm told came out of the WW2-era 115V PS used to power an ART-13 transmitter.; /archives//html/Amps/2012-05/msg00273.html (7,275 bytes)
37. Re: [Amps] Transformer question (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Sat, 12 May 2012 21:31:35 -0400; I never heard of a AC supplied ART-13 but that doesnt mean it wasnt available for some application. The normal use was in airplanes and a 28V dynamotor supply was used to supply 1000VDC to the 813 an; /archives//html/Amps/2012-05/msg00274.html (9,416 bytes)
38. [Amps] Transformer Question (score: 1): Author: "Matt" <maflukey@gmail.com>; Date: Thu, 27 Feb 2020 00:49:08 -0600; The HV transformer in my Gonset GSB-201 (original series model) recently shorted out. Peter Dahl offers a replacement, but the cost is not really economical considering the value of the amplifier. I; /archives//html/Amps/2020-02/msg00122.html (7,176 bytes)
39. [Amps] Transformer Question (score: 1): Author: Rob Atkinson <ranchorobbo@gmail.com>; Date: Thu, 27 Feb 2020 06:45:45 -0600; That is way way way too much capacitance. With a filter choke (choke input filter) you probably only need at most 10 to 20 mfd capacitance. You have around 20 times too much and that's probably why; /archives//html/Amps/2020-02/msg00123.html (7,662 bytes)
40. Re: [Amps] Transformer Question (score: 1): Author: Victor Rosenthal 4X6GP <k2vco.vic@gmail.com>; Date: Thu, 27 Feb 2020 14:49:27 +0200; I suspect those capacitors were actually in series and he added up the values printed on them. 73, Victor, 4X6GP Rehovot, Israel Formerly K2VCO CWops no. 5 http://www.qsl.net/k2vco/ On 27/02/2020 14:; /archives//html/Amps/2020-02/msg00124.html (8,052 bytes)

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