- 1. [TowerTalk] 40 Meter Beam problem (score: 1)
- Author: Dave Thompson <thompson@mindspring.com>
- Date: Fri, 17 Jul 2020 10:47:44 -0400 (GMT-04:00)
- Gang, My Cushcraft 2 el 40 went dead on me and after checking the coax it seems either the coax or balun may be bad. Is there a way to use the MFJ antenna analyzer to check the problem from the groun
- /archives//html/Towertalk/2020-07/msg00195.html (7,005 bytes)
- 2. Re: [TowerTalk] 40 Meter Beam problem (score: 1)
- Author: W0MU Mike Fatchett <w0mu@w0mu.com>
- Date: Fri, 17 Jul 2020 10:09:41 -0600
- Define went dead? SWR is infinite? Can you hear anything? Which model? Is it the newer model that uses a Capacitor or the old style 40-2CD which used a simple coils of coax for the choke? W0MU My C
- /archives//html/Towertalk/2020-07/msg00196.html (8,181 bytes)
- 3. Re: [TowerTalk] 40 Meter Beam problem (score: 1)
- Author: <sawyered@earthlink.net>
- Date: Fri, 17 Jul 2020 12:38:14 -0400
- Have you used the TDR to see how far up the coax the problem is? If its showing "at the beam" - there is no way I know of to confirm what is the issue jus that its at the beam. Obviously, if the faul
- /archives//html/Towertalk/2020-07/msg00197.html (6,842 bytes)
- 4. Re: [TowerTalk] 40 Meter Beam problem (score: 1)
- Author: Jon Zaimes via TowerTalk <towertalk@contesting.com>
- Date: Fri, 17 Jul 2020 17:14:52 +0000 (UTC)
- Use binoculars or telescope. Common failure is the wire connection from balun to driven element. Can usually see this from ground. 73/Jon Jon P. Zaimes, AA1K Tower climber for hire Website: aa1k.us C
- /archives//html/Towertalk/2020-07/msg00198.html (8,708 bytes)
- 5. Re: [TowerTalk] 40 Meter Beam problem (score: 1)
- Author: john@kk9a.com
- Date: Fri, 17 Jul 2020 12:52:54 -0500
- Dead to me would mean no signals. Coax does not typically open unless physically cut which you could see. It is likely a connection issue or a balun. What type of balun are you using? Hopefully not a
- /archives//html/Towertalk/2020-07/msg00200.html (7,799 bytes)
- 6. Re: [TowerTalk] 40 Meter Beam problem (score: 1)
- Author: Jim Brown <jim@audiosystemsgroup.com>
- Date: Fri, 17 Jul 2020 12:47:30 -0700
- Not that I can think of if it's a 259-series -- that's very old technology. To locate the fault along the line, you need a good sweep analyzer with software that can do high resolution TDR. This is m
- /archives//html/Towertalk/2020-07/msg00201.html (8,187 bytes)
- 7. Re: [TowerTalk] 40 Meter Beam problem (score: 1)
- Author: Richard Solomon <dickw1ksz@gmail.com>
- Date: Fri, 17 Jul 2020 13:17:05 -0700
- Take a look at the NanoVNA-H over on the Gigaparts website. No need anymore to spend big bucks on a VNA. 73, Dick, W1KSZ _______________________________________________ ______________________________
- /archives//html/Towertalk/2020-07/msg00202.html (8,718 bytes)
- 8. Re: [TowerTalk] 40 Meter Beam problem (score: 1)
- Author: Dave Thompson <thompson@mindspring.com>
- Date: Sun, 19 Jul 2020 10:58:03 -0400 (GMT-04:00)
- Thanks for all the replies. My MFJ-259B does not have a TDR. When putting up the beams 3 years ago I did have a problem with a bad double connector. Replacing it cured the problem. I plan on replacin
- /archives//html/Towertalk/2020-07/msg00214.html (9,602 bytes)
- 9. Re: [TowerTalk] 40 Meter Beam problem (score: 1)
- Author: "Gary Schafer" <garyschafer@largeriver.net>
- Date: Sun, 19 Jul 2020 10:11:21 -0500
- If you have an open or short in the feedline you can find it with the mFJ. It has a cable length function that will do it. 73 Gary K4FMX _______________________________________________ ______________
- /archives//html/Towertalk/2020-07/msg00215.html (10,720 bytes)
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