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21. Re: [TenTec] Built in SWR meter bannans (score: 1): Author: Al Gulseth <wb5jnc@centurytel.net>; Date: Tue, 23 Apr 2013 15:52:49 -0500; Jim, TNX for the info. Does it matter whether the THHN is solid or stranded? What core size do you recommend (I'm guessing 2" or so)? Also, (purely from a "dumb questions dept." perspective) would a; /archives//html/TenTec/2013-04/msg00254.html (11,455 bytes)
22. Re: [TenTec] Built in SWR meter bannans (score: 1): Author: d.e.warnick@comcast.net; Date: Tue, 23 Apr 2013 21:54:09 +0000 (UTC); THHN is that stuff they have at Home Depot or Lowe's for house wiring. It is in spools of single wire, many colors and usually 12 GA, though many guages are available. Simply put, it's single strand; /archives//html/TenTec/2013-04/msg00256.html (13,835 bytes)
23. Re: [TenTec] Built in SWR meter bannans (score: 1): Author: Stuart Rohre <rohre@arlut.utexas.edu>; Date: Tue, 23 Apr 2013 17:03:49 -0500; This is also a common wire pulled inside conduit tubing. In the British wiring systems of some years back a similar wire was used atop wood planks for house wiring of ring circuits, (out and back to; /archives//html/TenTec/2013-04/msg00257.html (9,617 bytes)
24. Re: [TenTec] Built in SWR meter bannans (score: 1): Author: Kim Elmore <cw_de_n5op@sbcglobal.net>; Date: Tue, 23 Apr 2013 17:20:10 -0500; But what about the third "ground" conductor between the "hot" and "neutral" lines? Won't TNT screw things up? Kim N5OP "People that make music together cannot be enemies, at least as long as the musi; /archives//html/TenTec/2013-04/msg00259.html (15,987 bytes)
25. Re: [TenTec] Built in SWR meter bannans (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Tue, 23 Apr 2013 16:38:37 -0700; Thanks for the details. I have noted your suggestion for future use. I'm not sure what THHN wire is, but I will google it. I'm sure we have it here, but under a different name. You said ordinary hous; /archives//html/TenTec/2013-04/msg00262.html (11,766 bytes)
26. Re: [TenTec] Built in SWR meter bannans (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Tue, 23 Apr 2013 16:44:36 -0700; I use solid wire because it holds its shape better. What core size do you recommend (I'm guessing 2" or so)? The 2.4-inch o.d. cores are the right choice. Also, (purely from a "dumb questions dept."; /archives//html/TenTec/2013-04/msg00263.html (10,158 bytes)
27. Re: [TenTec] Built in SWR meter bannans (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Tue, 23 Apr 2013 16:48:41 -0700; THHN is a single conductor, and comes in several colors. House wiring can also be bought with several colors inside an overall outer jacket, both twisted and untwisted. The outer jacket can be remove; /archives//html/TenTec/2013-04/msg00264.html (10,011 bytes)
28. Re: [TenTec] Built in SWR meter bannans (score: 1): Author: "Charles P. Steinmetz" <charles_steinmetz@lavabit.com>; Date: Tue, 23 Apr 2013 20:22:59 -0400; I had so much trouble burning up baluns back in the 80s that I have switched to using only Teflon insulated wire for my chokes and baluns. Baluns don't normally burn up because the insulation isn't a; /archives//html/TenTec/2013-04/msg00265.html (10,314 bytes)
29. Re: [TenTec] Built in SWR meter bannans (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Tue, 23 Apr 2013 18:40:03 -0700; Yeah, and a lot of it is wrong. :) 73, Jim K9YC _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/listinfo/tentec; /archives//html/TenTec/2013-04/msg00267.html (9,545 bytes)
30. Re: [TenTec] Built in SWR meter bannans (score: 1): Author: "Charles P. Steinmetz" <charles_steinmetz@lavabit.com>; Date: Tue, 23 Apr 2013 22:55:15 -0400; There is lots of information [about baluns] on the web. Jim replied: Yeah, and a lot of it is wrong. :) I take that as a given, so unexceptionable as not to require mention. I'd actually go further; /archives//html/TenTec/2013-04/msg00268.html (10,143 bytes)
31. Re: [TenTec] Built in SWR meter bannans (score: 1): Author: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>; Date: Wed, 24 Apr 2013 07:17:56 +0200; Thanks Dave. I've never seen the wire you guys are referring to. We don't have a Home Depot or Lowe's here in Germany. No "botch it yourself" here! (hi) But of course we have similar stores. "House W; /archives//html/TenTec/2013-04/msg00273.html (16,398 bytes)
32. Re: [TenTec] Built in SWR meter bannans (score: 1): Author: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>; Date: Wed, 24 Apr 2013 07:27:06 +0200; Tnx agn Jim. Our legal limit is 750w, but the wire I spoke of is only being used in barefoot applications (100w). For high power I use thicker 2mm Teflon-covered wire. AWG-12 is 2.05mm so it's about; /archives//html/TenTec/2013-04/msg00274.html (11,851 bytes)
33. Re: [TenTec] Built in SWR meter bannans (score: 1): Author: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>; Date: Wed, 24 Apr 2013 07:50:07 +0200; Charles, Thanks for the information. My story was in the 1980 and we didn't have a web back then. Information on baluns and chokes was scarce. I burned up commercial baluns rated 2KW or more running; /archives//html/TenTec/2013-04/msg00275.html (12,665 bytes)
34. Re: [TenTec] Built in SWR meter bannans (score: 1): Author: "Charles P. Steinmetz" <charles_steinmetz@lavabit.com>; Date: Wed, 24 Apr 2013 02:17:42 -0400; It seems you would want to use wire whose insulation will not melt before the saturation temperature of the core. Well, that's fine, but the core should never be anywhere near its saturation temperat; /archives//html/TenTec/2013-04/msg00276.html (11,319 bytes)
35. Re: [TenTec] Built in SWR meter bannans (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Tue, 23 Apr 2013 23:23:37 -0700; Dielectric constant will be different, which changes the capacitance, which changes the shape of the Z curve. THHN yields a particularly nice Z curve. I haven't looked at Teflon, which might be fine; /archives//html/TenTec/2013-04/msg00277.html (11,421 bytes)
36. Re: [TenTec] Built in SWR meter bannans (score: 1): Author: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>; Date: Wed, 24 Apr 2013 08:46:22 +0200; OK, thanks Jim. This has been a very educational thread. I read your document once but I need to go back and take more time and study it. There is far too much information in it to be comprehended in; /archives//html/TenTec/2013-04/msg00278.html (11,778 bytes)
37. Re: [TenTec] Built in SWR meter bannans (score: 1): Author: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>; Date: Wed, 24 Apr 2013 09:18:30 +0200; Charles, you are digging back in history now. In fact the story I told was closer to 30 years ago. A lot has changed in the meantime, including my knowledge on the subject. Back then, I bought (for t; /archives//html/TenTec/2013-04/msg00280.html (12,793 bytes)
38. Re: [TenTec] Built in SWR meter bannans (score: 1): Author: Steve Hunt <steve@karinya.net>; Date: Wed, 24 Apr 2013 09:18:55 +0100; Rick, It's not difficult - just a bit tedious - to work this stuff out. Let me walk you through the example of a feedpoint 1:1 balun for a 40m beam: 1) Assume the power level is 1kW and the beam feed; /archives//html/TenTec/2013-04/msg00281.html (13,391 bytes)
39. Re: [TenTec] Built in SWR meter bannans (score: 1): Author: shristov <shristov@ptt.rs>; Date: Wed, 24 Apr 2013 11:22:16 +0200; Heat is produced in both the wire and the core. A lossy core wound with a small number of turns, and subjected to substantial common mode VOLTAGE will overheat. 73, Sinisa YT1NT, VE3EA _____________; /archives//html/TenTec/2013-04/msg00282.html (10,379 bytes)
40. Re: [TenTec] Built in SWR meter bannans (score: 1): Author: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>; Date: Wed, 24 Apr 2013 11:28:44 +0200; Steve, Thanks for walking me through the process. The beams aren't really the problem, although most beams in amateur use probably are higher than 2:1 on one end of each band. My former problems were; /archives//html/TenTec/2013-04/msg00283.html (15,314 bytes)

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