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Total 15 documents matching your query.

1. [TowerTalk] TH7-DX 15M problem (score: 1): Author: "Radio K0HB" <kzerohb@gmail.com>; Date: Wed, 26 Aug 2015 15:23:34 -0500; I have an odd issue with a TH7-DXS. A while back I started to see a higher-than normal SWR, just on 15M, and just when running some smoke. While barefoot the problem never arises. The problem never h; /archives//html/Towertalk/2015-08/msg00451.html (9,149 bytes)
2. Re: [TowerTalk] TH7-DX 15M problem (score: 1): Author: David Robbins <k1ttt@verizon.net>; Date: Wed, 26 Aug 2015 14:43:33 -0500 (CDT); a problem with the amp? I have an odd issue with a TH7-DXS. A while back I started to see a higher-than normal SWR, just on 15M, and just when running some smoke. While barefoot the problem never ari; /archives//html/Towertalk/2015-08/msg00453.html (9,547 bytes)
3. Re: [TowerTalk] TH7-DX 15M problem (score: 1): Author: "Radio K0HB" <kzerohb@gmail.com>; Date: Wed, 26 Aug 2015 16:40:28 -0500; Responding to Dave -- the amp works fine on a different antenna on 15M, and good as gold on all other bands on any antenna. Hard to suspect the amp. Responding to Matt -- the SWR meter is external, d; /archives//html/Towertalk/2015-08/msg00456.html (10,633 bytes)
4. Re: [TowerTalk] TH7-DX 15M problem (score: 1): Author: Robert Harmon <k6uj@pacbell.net>; Date: Wed, 26 Aug 2015 14:32:23 -0700; Hans, I would have suspected the 15 meter traps too. I would start doing the process of elimination to narrow down the culprit. Disconnect the coax feeding the TH7 in the shack and put a coax jumper; /archives//html/Towertalk/2015-08/msg00458.html (13,061 bytes)
5. Re: [TowerTalk] TH7-DX 15M problem (score: 1): Author: "Don W7WLL" <w7wll@arrl.net>; Date: Wed, 26 Aug 2015 16:35:11 -0700; Some questions, some probably obvious! 1. Full set - you mean all 6 15M traps?? If a one band issue and the SWR is high (5-10) I'd be looking for the problem in the DE's. If lower (assuming it was wo; /archives//html/Towertalk/2015-08/msg00459.html (11,598 bytes)
6. Re: [TowerTalk] TH7-DX 15M problem (score: 1): Author: "Radio K0HB" <kzerohb@gmail.com>; Date: Wed, 26 Aug 2015 19:57:37 -0500; Yes, I installed a full set of 6 new 15M traps (4 on the DE's, and 2 on the reflector). The symptom did not change. The BN86 bit the dust years ago, now have a 4KW version up there. Before installing; /archives//html/Towertalk/2015-08/msg00460.html (13,403 bytes)
7. Re: [TowerTalk] TH7-DX 15M problem (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Wed, 26 Aug 2015 20:33:13 -0400; It seems to point to a 10 meter trap issue (just because that's the only piece left in the food chain), but a faulty 10 meter trap should cause a problem on 10 meters when it is seeing the highest vo; /archives//html/Towertalk/2015-08/msg00461.html (14,240 bytes)
8. Re: [TowerTalk] TH7-DX 15M problem (score: 1): Author: <john@kk9a.com>; Date: Wed, 26 Aug 2015 21:42:42 -0400; The traps would have been the first thing on my list also. Normally I would not suspect the balun but you are running out of options. I am assuming from your posts that you "upgraded" to the BN-4000; /archives//html/Towertalk/2015-08/msg00463.html (9,101 bytes)
9. Re: [TowerTalk] TH7-DX 15M problem (score: 1): Author: "David Robbins" <k1ttt@arrl.net>; Date: Thu, 27 Aug 2015 11:19:54 +0000; No, running the amp into a dummy load won't rule out the amp. A high swr like that caused by the amp is because the amp starts detuning and generates harmonics, its the harmonics that would be reflec; /archives//html/Towertalk/2015-08/msg00469.html (14,882 bytes)
10. Re: [TowerTalk] TH7-DX 15M problem (score: 1): Author: "john@kk9a.com" <john@kk9a.com>; Date: Thu, 27 Aug 2015 08:50:32 -0500; Trying a different amp could rule it out. John KK9A No, running the amp into a dummy load won't rule out the amp. A high swr like that caused by the amp is because the amp starts detuning and generat; /archives//html/Towertalk/2015-08/msg00471.html (9,645 bytes)
11. Re: [TowerTalk] TH7-DX 15M problem (score: 1): Author: "Radio K0HB" <kzerohb@gmail.com>; Date: Thu, 27 Aug 2015 06:57:21 -0700 (PDT); Don't have a second amp, but the amp plays just fine on a different antenna. __73, de Hans, K0HB "Just a Boy and His Radio" _______________________________________________ ___________________________; /archives//html/Towertalk/2015-08/msg00472.html (11,210 bytes)
12. Re: [TowerTalk] TH7-DX 15M problem (score: 1): Author: David Robbins <k1ttt@verizon.net>; Date: Thu, 27 Aug 2015 09:35:04 -0500 (CDT); a different antenna, like I think you said a 40m V, might not reflect harmonics as well as the traps on a yagi would. Don't have a second amp, but the amp plays just fine on a different antenna. __73; /archives//html/Towertalk/2015-08/msg00473.html (11,726 bytes)
13. Re: [TowerTalk] TH7-DX 15M problem (score: 1): Author: Michael Murphy <mike@ki8r.com>; Date: Thu, 27 Aug 2015 10:48:41 -0400; Build a 15 meter dipole and try loading it. Should tell the story if the amp is really the issue. -- -- *Michael Murphy - KI8R* mike@ki8r.com www.ki8r.com *614-371-8265 (cell)* -- ___________________; /archives//html/Towertalk/2015-08/msg00475.html (12,739 bytes)
14. Re: [TowerTalk] TH7-DX 15M problem (score: 1): Author: Patrick Greenlee <patrick_g@windstream.net>; Date: Thu, 27 Aug 2015 11:15:47 -0500; Excellent advice. I had a weird problem with fluctuating VSWR. Eventually I got around to putting up a quickie DIY Dipole and fed it with other coax. Still had weird problem. Changed out some "factor; /archives//html/Towertalk/2015-08/msg00476.html (9,505 bytes)
15. Re: [TowerTalk] TH7-DX 15M problem (score: 1): Author: Pete Smith N4ZR <n4zr@contesting.com>; Date: Thu, 27 Aug 2015 15:12:32 -0400; Or a feedline connector that happens to be at a current or voltage node on 15? 73, Pete N4ZR Download the new N1MM Logger+ at <http://N1MM.hamdocs.com>. Check out the Reverse Beacon Network at <http:; /archives//html/Towertalk/2015-08/msg00480.html (12,233 bytes)

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