- 1. [TowerTalk] Antenna matching values (score: 1)
- Author: "Drax Felton" <draxfelton@gmail.com>
- Date: Mon, 21 Apr 2014 23:44:02 -0400
- I have a phased set of four 2 meter Yagi's that I tuned using the gamma matches on the antennas the best I could. Now that the antennas are 90 feet in the air I have a slight SWR problem at the input
- /archives//html/Towertalk/2014-04/msg00446.html (7,261 bytes)
- 2. Re: [TowerTalk] Antenna matching values (score: 1)
- Author: Jim Brown <jim@audiosystemsgroup.com>
- Date: Mon, 21 Apr 2014 23:35:34 -0700
- Hi Drax, Some thoughts. Those SWR values at the TX end of a feedline indicate a significantly higher SWR at the antenna, which in turn suggests that something is wrong up there. Or perhaps somewhere
- /archives//html/Towertalk/2014-04/msg00453.html (8,821 bytes)
- 3. Re: [TowerTalk] Antenna matching values (score: 1)
- Author: "John Lemay" <john@carltonhouse.eclipse.co.uk>
- Date: Tue, 22 Apr 2014 08:16:32 +0100
- Hello Drax The measurements of SWR that you have recorded suggest that something is quite severely wrong with your array. I'd hazard a guess that one or more aerials has become disconnected, or that
- /archives//html/Towertalk/2014-04/msg00455.html (9,043 bytes)
- 4. Re: [TowerTalk] Antenna matching values (score: 1)
- Author: john@kk9a.com
- Date: Tue, 22 Apr 2014 08:08:06 -0400
- What does this mean: "I tuned using the gamma matches on the antennas the best I could" Did you have trouble obtaining a 1:1 match? You can check and adjust the impedance of a single antenna though c
- /archives//html/Towertalk/2014-04/msg00458.html (8,421 bytes)
- 5. Re: [TowerTalk] Antenna matching values (score: 1)
- Author: Drax Felton <draxfelton@gmail.com>
- Date: Tue, 22 Apr 2014 20:37:00 -0400
- I found the problem. Torn cable into coax. Must've snagged. Thanks guys. Odd that damage only showed as a 2.0:1 mismatch! Sent from my iPhone _______________________________________________ _________
- /archives//html/Towertalk/2014-04/msg00492.html (10,377 bytes)
- 6. Re: [TowerTalk] Antenna matching values (score: 1)
- Author: Jim Brown <jim@audiosystemsgroup.com>
- Date: Tue, 22 Apr 2014 17:43:12 -0700
- Remember that any SWR will be reduced by loss in the line. That can be significant if the line is long enough and the frequency is high enough. Great that you found the problem. 73, Jim K9YC _______
- /archives//html/Towertalk/2014-04/msg00493.html (8,065 bytes)
- 7. Re: [TowerTalk] Antenna matching values (score: 1)
- Author: "Ian White" <gm3sek@ifwtech.co.uk>
- Date: Wed, 23 Apr 2014 08:11:51 +0100
- guys. It depends on which conductor was torn. A torn center conductor is usually quite dramatic: everything stops. On the other hand, a torn shield can often cause only a moderate mismatch because t
- /archives//html/Towertalk/2014-04/msg00503.html (8,557 bytes)
- 8. Re: [TowerTalk] Antenna matching values (score: 1)
- Author: Jim Brown <jim@audiosystemsgroup.com>
- Date: Wed, 23 Apr 2014 12:03:20 -0700
- On 4/23/2014 12:11 AM, Ian White wrote: We often see these sudden puzzling problems reported on radio-related mailing lists, and bad shield connections turn out to be THE most common single cause. Of
- /archives//html/Towertalk/2014-04/msg00511.html (8,829 bytes)
- 9. Re: [TowerTalk] Antenna matching values (score: 1)
- Author: K7LXC--- via TowerTalk <towertalk@contesting.com>
- Date: Thu, 24 Apr 2014 11:48:23 -0400 (EDT)
- two ago. Specifically, he described a problem caused by junk coax. Yessireebob. I haven't seen too many 'antenna' problems but the few that I have had were all something other than the antenna; e.g.
- /archives//html/Towertalk/2014-04/msg00518.html (8,453 bytes)
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