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1. [TenTec] 450 Ohm feedline (score: 1): Author: "Rob Atkinson, K5UJ" <k5uj@hotmail.com>; Date: Thu, 15 Apr 2004 16:37:57 +0000; The purpose of twisting the line is not to reduce noise pickup and radiation, it is to help keep the line balanced. I'd forget about using any kind of wood pane. Go with plexiglass. Just about any gl; /archives//html/TenTec/2004-04/msg00185.html (9,205 bytes)
2. RE: [TenTec] 450 Ohm feedline (score: 1): Author: "NJ0IP" <Rick@dj0ip.de>; Date: Thu, 15 Apr 2004 18:55:23 -0700; http://airwaterkinginc.purification.com/bzmmremotemotor.html Nice ! --Original Message-- From: tentec-bounces@contesting.com [mailto:tentec-bounces@contesting.com]On Behalf Of Rob Atkinson, K5UJ Sent; /archives//html/TenTec/2004-04/msg00186.html (9,336 bytes)
3. RE: [TenTec] 450 Ohm feedline (score: 1): Author: "Grant Youngman" <nq5t@comcast.net>; Date: Thu, 15 Apr 2004 12:27:30 -0500; The Bliss tuners look nice ... but .. gasp ... the prices ... -- Grant Youngman /NQ5T http://www.globeking.com nq5t@comcast.net < == NEW _______________________________________________ TenTec mailing; /archives//html/TenTec/2004-04/msg00187.html (6,993 bytes)
4. Re: [TenTec] 450 Ohm feedline (score: 1): Author: "Tony Martin W4FOA" <w4foa@comcast.net>; Date: Thu, 15 Apr 2004 13:11:31 -0500; Like they say, you can learn something new everyday. All of these years I thought we were twisting the "ladderline" to lessen the "whipping action" in the wind....I guess it is just accidental but I'; /archives//html/TenTec/2004-04/msg00189.html (10,825 bytes)
5. Re: [TenTec] 450 Ohm feedline (score: 1): Author: "Don" <kd6hq@sonic.net>; Date: Thu, 15 Apr 2004 12:18:02 -0700; The Bliss tuner is nice and works well and yes it is pricy. But then look at the components it uses, motorized (2 speeds), vacum varriable cap from 7-1000 pf, roller inductor from 0 to 56 uH. Gives y; /archives//html/TenTec/2004-04/msg00191.html (8,737 bytes)
6. Re: [TenTec] 450 Ohm feedline (score: 1): Author: ac5e@comcast.net; Date: Thu, 15 Apr 2004 19:52:54 +0000; Well, you learn something every day. But I 'spect my first Elmer, Old Hardman, would have a good belly laugh about twisting the line to keep it balanced. Back in '47 we were told that the two halves; /archives//html/TenTec/2004-04/msg00193.html (8,208 bytes)
7. Re: [TenTec] 450 Ohm feedline (score: 1): Author: "K Van Horn" <W7SV@sbcglobal.net>; Date: Thu, 15 Apr 2004 15:02:25 -0500; Grant, I use the Palstar AT1500BAL. I works wonderfully and is much cheaper than the Bliss tuner. The Palstar website is http://www.palstar.com/palmain.htm . I told Art Bell W6OBB about how much I li; /archives//html/TenTec/2004-04/msg00194.html (9,030 bytes)
8. RE: [TenTec] 450 Ohm feedline (score: 1): Author: "NJ0IP" <Rick@dj0ip.de>; Date: Thu, 15 Apr 2004 22:47:14 -0700; Tony, again I fully agree with you. I understand the merrits of twisting when passing near some metal object - both sides are equally effected, but I've always twisted mine because it seems (subjecti; /archives//html/TenTec/2004-04/msg00195.html (11,916 bytes)
9. RE: [TenTec] 450 Ohm feedline (score: 1): Author: "Chuck (Jack) Hawley" <c-hawley@uiuc.edu>; Date: Thu, 15 Apr 2004 19:19:57 -0500; These items are out of the Collins 180L (?) tuner. The roller is that one with the silver ribbon that winds up on one drum from another. The vacuum variable is what many of us mobile antenna tuner bu; /archives//html/TenTec/2004-04/msg00200.html (10,677 bytes)
10. Re: [TenTec] 450 Ohm feedline (score: 1): Author: Robert & Linda McGraw K4TAX <RMcGraw@Blomand.Net>; Date: Thu, 15 Apr 2004 20:57:07 -0500; Regarding twisting the feed-line, why do you suppose the phone company called it "a twisted pair"? Answer: because that what it was and it was used to maintain symmetry and thus reduce induced voltag; /archives//html/TenTec/2004-04/msg00202.html (10,536 bytes)
11. RE: [TenTec] 450 Ohm feedline (score: 1): Author: Barbara Maloney <ac5p@sbcglobal.net>; Date: Thu, 15 Apr 2004 20:17:13 -0700 (PDT); Just a reminder that it is quite possible to match subject direct to 50 ohms without a tuner and do it on more than one band effectively. Likewise it is possible to match true ladder line (open air s; /archives//html/TenTec/2004-04/msg00203.html (8,058 bytes)
12. RE: [TenTec] 450 Ohm feedline (score: 1): Author: "Chuck (Jack) Hawley" <c-hawley@uiuc.edu>; Date: Fri, 16 Apr 2004 01:40:10 -0500; Actually I think a great benefit is from reducing crosstalk from adjacent pairs. The benefit of twisting tends to be significant up to around 30MHz...by one account I read. Chuck, KE9UW -- Outgoing m; /archives//html/TenTec/2004-04/msg00204.html (8,969 bytes)
13. RE: [TenTec] 450 Ohm feedline (score: 1): Author: "NJ0IP" <Rick@dj0ip.de>; Date: Fri, 16 Apr 2004 08:58:20 -0700; The balun Bob has describes is super but huge. It is described in detail ub Bill Orr's (W6SAI) BEAM ANTENNA HANDBOOK in the chapter on Matching Devices. I have always used the rule of thumb to use ba; /archives//html/TenTec/2004-04/msg00205.html (12,313 bytes)
14. RE: [TenTec] 450 Ohm feedline (score: 1): Author: "NJ0IP" <Rick@dj0ip.de>; Date: Fri, 16 Apr 2004 09:08:22 -0700; My shack is two floors above our telephone computer (don't know the English name for that little black box). I originally ran a cable upstairs with 4 wires inside (not twisted) but it was shielded. I; /archives//html/TenTec/2004-04/msg00206.html (9,851 bytes)
15. Re: [TenTec] 450 Ohm feedline (score: 1): Author: "Rob Atkinson, K5UJ" <k5uj@hotmail.com>; Date: Fri, 16 Apr 2004 14:09:12 +0000; Thanks Tony and Ron and others. In the critical light of morning I realize my statement made no sense. Of course if the line is balanced that will reduce radiation. I guess twisting window line equal; /archives//html/TenTec/2004-04/msg00209.html (9,381 bytes)
16. Re: [TenTec] 450 Ohm feedline (score: 1): Author: "Alfred Lorona" <w6wqc@dslextreme.com>; Date: Fri, 16 Apr 2004 08:43:13 -0700; Hi, Mike: Say, where did you find those DPDT knife switches? I've been looking for a source for years. 73. AL, w6wqc _______________________________________________ TenTec mailing list TenTec@contest; /archives//html/TenTec/2004-04/msg00210.html (8,504 bytes)
17. Re: [TenTec] 450 Ohm feedline (score: 1): Author: "JAMES HANLON" <knjhanlon@msn.com>; Date: Fri, 16 Apr 2004 10:15:37 -0600; I'm an old Bell Labs engineer, and I can recall being taught in our "CDT" (Communications Development Training) courses that the pairs were twisted to cut down on the cross talk from other pairs bund; /archives//html/TenTec/2004-04/msg00211.html (8,632 bytes)
18. Re: [TenTec] 450 Ohm feedline (score: 1): Author: "Stuart Rohre" <rohre@arlut.utexas.edu>; Date: Fri, 16 Apr 2004 12:19:39 -0500; Both Palstar and now MFJ, have true balanced tuners for sale. 73 Stuart K5KVH _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mai; /archives//html/TenTec/2004-04/msg00212.html (8,321 bytes)
19. Re: [TenTec] 450 Ohm feedline (score: 1): Author: "Stuart Rohre" <rohre@arlut.utexas.edu>; Date: Fri, 16 Apr 2004 12:33:47 -0500; It is true that flat lines make a good sail in wind. In Marine deep water work even with round cables, we put a material on the cable to twist around it, to reduce the ability of the cable to "strum"; /archives//html/TenTec/2004-04/msg00213.html (9,416 bytes)
20. Re: [TenTec] 450 Ohm feedline (score: 1): Author: "William Winscott" <n6cha@cox-internet.com>; Date: Fri, 16 Apr 2004 13:06:14 -0500; HI..AL...TRY SURPLUS SALES OF NEBRASKA, THEY HAVE THE DPDT SWITCHES YOU ARE LOOKING FOR.....GOOD LUCK BILL N6CHA for a _______________________________________________ TenTec mailing list TenTec@conte; /archives//html/TenTec/2004-04/msg00215.html (9,656 bytes)

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