Mail Archive Search: <+subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+Strange\s+coax\s+failure\s*$/>

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+Strange\s+coax\s+failure\s*$/: 17 ]

Total 17 documents matching your query.

1. [TowerTalk] Strange coax failure (score: 1): Author: Patrick Greenlee <patrick_g@windstream.net>; Date: Mon, 15 Dec 2014 10:09:17 -0600; Most all tower users have fairly extensive coax runs on which we depend for near trouble free service. Here is one strange tale... I had been having fits chasing an antenna/feedline/connector problem; /archives//html/Towertalk/2014-12/msg00160.html (10,094 bytes)
2. Re: [TowerTalk] Strange coax failure (score: 1): Author: Tom LeClerc W1TJL <wb1cby@gmail.com>; Date: Mon, 15 Dec 2014 11:20:12 -0500; I saw some coax a few years ago where the center conductor was not entirely in the middle of the insulator. Bad molding? It was RIGHT up near the shield in some spots and centered in others... If I r; /archives//html/Towertalk/2014-12/msg00161.html (11,347 bytes)
3. Re: [TowerTalk] Strange coax failure (score: 1): Author: <w5gn@mxg.com>; Date: Mon, 15 Dec 2014 11:22:31 -0600; I believe that's why foam coax baluns are unwise in warm climates; I seem to recall several disaster stories in the early 70s around Dallas where the weight of the coax and the hot sun deformed and i; /archives//html/Towertalk/2014-12/msg00164.html (12,191 bytes)
4. Re: [TowerTalk] Strange coax failure (score: 1): Author: Tom Osborne <w7why@frontier.com>; Date: Mon, 15 Dec 2014 10:09:47 -0800; Hi Patrick Don't think I'd cut them in half. I'd just cut the plugs off and replace them and check the cable again. Might be something in the plugs that are bad and you would be wasting a bunch of ca; /archives//html/Towertalk/2014-12/msg00169.html (8,130 bytes)
5. Re: [TowerTalk] Strange coax failure (score: 1): Author: Ray Benny <rayn6vr@cableone.net>; Date: Mon, 15 Dec 2014 12:19:18 -0700; Patrick, I had a case once of a shorted coax due to a manufacturing defect. The coax was a 100 ft piece. I had first cut off the connectors one at a time but found the coax still shorted. I cut the c; /archives//html/Towertalk/2014-12/msg00170.html (10,079 bytes)
6. Re: [TowerTalk] Strange coax failure (score: 1): Author: Mike Fahmie via TowerTalk <towertalk@contesting.com>; Date: Mon, 15 Dec 2014 19:21:44 +0000 (UTC); Water in a connector can do that. Looks fine on ohm meter but RF sees the very very high dielectric constant of water and shunts to ground. This first got me when some water got into a Type N barre; /archives//html/Towertalk/2014-12/msg00171.html (11,584 bytes)
7. Re: [TowerTalk] Strange coax failure (score: 1): Author: Mark Stennett <mark@stennett.com>; Date: Mon, 15 Dec 2014 13:27:27 -0600; A time domain reflectometer would eliminate the guess work and show you where the defect was on the line. 73 de na6m _______________________________________________ __________________________________; /archives//html/Towertalk/2014-12/msg00172.html (11,138 bytes)
8. Re: [TowerTalk] Strange coax failure (score: 1): Author: Richard Solomon <dickw1ksz@gmail.com>; Date: Mon, 15 Dec 2014 14:58:22 -0700; If you can find a TDR, like a Tektronix, you can see where the defect is. 73 es HH, Dick, W1KSZ _______________________________________________ _______________________________________________ TowerTa; /archives//html/Towertalk/2014-12/msg00178.html (11,431 bytes)
9. Re: [TowerTalk] Strange coax failure (score: 1): Author: Jack Brindle <jackbrindle@me.com>; Date: Mon, 15 Dec 2014 14:12:03 -0800; May not need the Tek TDR. The RigExpert AA-170 has a very good TDR function that would be able to tell where the discontinuity point is in the coax. No idea if the Comet device has this functionality; /archives//html/Towertalk/2014-12/msg00179.html (12,299 bytes)
10. Re: [TowerTalk] Strange coax failure (score: 1): Author: Patrick Greenlee <patrick_g@windstream.net>; Date: Mon, 15 Dec 2014 17:11:38 -0600; The problem was in a 6 ft jumper of RG-58U. I cut it in half and then started to cut off an inch at a time to look for defect. Lucked out and spotted it immediately. The center conductor was migrated; /archives//html/Towertalk/2014-12/msg00180.html (14,129 bytes)
11. Re: [TowerTalk] Strange coax failure (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Mon, 15 Dec 2014 17:50:25 -0800; I had a case once of a shorted coax due to a manufacturing defect. The coax was a 100 ft piece. I had first cut off the connectors one at a time but found the coax still shorted. I cut the coax in ha; /archives//html/Towertalk/2014-12/msg00184.html (9,497 bytes)
12. Re: [TowerTalk] Strange coax failure (score: 1): Author: Ray Benny <rayn6vr@cableone.net>; Date: Mon, 15 Dec 2014 18:58:40 -0700; My situation happened in the late 60's when I lived in Africa. No such equipment was available then. Now, no problem, most of us have such equipment... Ray, N6VR, ex ZD3G ____________________________; /archives//html/Towertalk/2014-12/msg00185.html (10,708 bytes)
13. Re: [TowerTalk] Strange coax failure (score: 1): Author: Patrick Greenlee <patrick_g@windstream.net>; Date: Mon, 15 Dec 2014 20:50:39 -0600; While true, Mark, I isolated the problem to the bad jumper in a couple minutes, as fast or maybe faster than getting out the boat anchor HP to do the TDR bit. I did waste some time comparing good to; /archives//html/Towertalk/2014-12/msg00186.html (12,646 bytes)
14. Re: [TowerTalk] Strange coax failure (score: 1): Author: K7LXC--- via TowerTalk <towertalk@contesting.com>; Date: Tue, 16 Dec 2014 10:07:34 -0500; entirely in the middle of the insulator. Bad molding? It was RIGHT up near the shield in some spots and centered in others... If I remember correctly it was a foam dielectric... A big problem with f; /archives//html/Towertalk/2014-12/msg00191.html (7,108 bytes)
15. Re: [TowerTalk] Strange coax failure (score: 1): Author: Patrick Greenlee <patrick_g@windstream.net>; Date: Tue, 16 Dec 2014 22:15:35 -0600; My problem coax jumper was solit not foam and it was only bad for a couple inches. I cut some up to check. Patrick NJ5G On 12/16/2014 9:07 AM, K7LXC-- via TowerTalk wrote: I saw some coax a few years; /archives//html/Towertalk/2014-12/msg00223.html (8,255 bytes)
16. Re: [TowerTalk] Strange coax failure (score: 1): Author: "Roger (K8RI) on TT" <K8RI-on-TowerTalk@tm.net>; Date: Thu, 18 Dec 2014 03:07:13 -0500; Warm? I live in Mi, which isn't usually considered warm, but we get the occasional summer day over 100. I know that's shy of the temps "down South", but black jacketed coax can easily become too hot; /archives//html/Towertalk/2014-12/msg00279.html (11,055 bytes)
17. Re: [TowerTalk] Strange coax failure (score: 1): Author: "Jeff AC0C" <keepwalking188@ac0c.com>; Date: Thu, 18 Dec 2014 11:11:40 -0600; I used RG11 (foam) for a few traps on an attic antenna (very hot in the summer) that was used for rtty contesting (plenty of heat being dissipated by the trap). The trick is to get a big enough radiu; /archives//html/Towertalk/2014-12/msg00283.html (12,563 bytes)

Current List: 1 - 17
Page: [1]