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

Total 17 documents matching your query.

1. [TowerTalk] Antenna Traps? (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Sun, 1 Jan 2023 12:07:05 -0500
Does anyone make decent traps for wire antennas (*not* coaxial traps) these days? If so, who and where are they available? I'm afraid my 20+ year old Reyco traps are about done in (corrosion of the a
/archives//html/Towertalk/2023-01/msg00001.html (7,099 bytes)

2. Re: [TowerTalk] Antenna Traps? (score: 1)
Author: john simmons <jasimmons@pinewooddata.com>
Date: Sun, 1 Jan 2023 17:14:48 +0000
Why not just replace the wire? New traps like those are unobtanium. Or start your own manufacturing and sell them Get Outlook for iOS<https://aka.ms/o0ukef> ________________________________ From: Tow
/archives//html/Towertalk/2023-01/msg00002.html (7,738 bytes)

3. Re: [TowerTalk] Antenna Traps? (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Sun, 1 Jan 2023 13:09:19 -0500
Yes, 2BDQ for 80/40 and 5BDQ for 80/40/20/15/10. The have nothing for 30/17/12 ... particularly a 30 Meter trap. 73, ... Joe, W4TV I'm afraid my 20+ year old Reyco traps are about done in (corrosion
/archives//html/Towertalk/2023-01/msg00003.html (8,426 bytes)

4. Re: [TowerTalk] Antenna Traps? (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Sun, 1 Jan 2023 13:14:29 -0500
Still shows on his web page but those are loading coils/chokes. I don't see an 80/40/30 meter product (I was never able to make a parallel wire 80/30 meter antenna work right but the trapped wire jus
/archives//html/Towertalk/2023-01/msg00004.html (8,856 bytes)

5. Re: [TowerTalk] Antenna Traps? (score: 1)
Author: Richard Zalewski <dick.w7zr@gmail.com>
Date: Sun, 1 Jan 2023 10:25:35 -0800
Joe, I used traps from Hy-Power for years in my 80/160 dipole and inverted V. They held up really well. https://www.hypowerantenna.com/ Richard *W7ZR* ex:5C5Z, CN2ZR, K2JSP, W6SBZ, W7KXR, K9ZIJ, W9KN
/archives//html/Towertalk/2023-01/msg00005.html (9,556 bytes)

6. Re: [TowerTalk] Antenna Traps? (score: 1)
Author: Jim Brown <jim@audiosystemsgroup.com>
Date: Sun, 1 Jan 2023 11:24:12 -0800
On 1/1/2023 10:25 AM, Richard Zalewski wrote: Joe, I used traps from Hy-Power for years in my 80/160 dipole and inverted V. They held up really well. https://www.hypowerantenna.com/ They are NOT trap
/archives//html/Towertalk/2023-01/msg00007.html (8,738 bytes)

7. Re: [TowerTalk] Antenna Traps? (score: 1)
Author: Brian Beezley <k6sti@att.net>
Date: Sun, 1 Jan 2023 15:21:14 -0800
The example shows how to automatically optimize an antenna with traps: http://ham-radio.com/k6sti/wbc.htm The trap resonance result deserves further study. Optimizing a 10/15m trapped dipole gave the
/archives//html/Towertalk/2023-01/msg00010.html (7,717 bytes)

8. Re: [TowerTalk] Antenna Traps? (score: 1)
Author: "James Wolf" <jbwolf@comcast.net>
Date: Sun, 1 Jan 2023 19:57:24 -0500
I'll also put in a word for Hy-Power. I have one of their 40/80 dipoles. They are well built and will handle legal limit just fine. Jim - KR9U _______________________________________________ ________
/archives//html/Towertalk/2023-01/msg00011.html (7,807 bytes)

9. Re: [TowerTalk] Antenna Traps? (score: 1)
Author: Jim <jimw7ry@gmail.com>
Date: Sun, 1 Jan 2023 19:02:29 -0600
What kind of a 80/40 dipole? Fan type of trapped? Big difference. Thanks, 73, Jim W7RY Jim - KR9U _______________________________________________ _______________________________________________ Tower
/archives//html/Towertalk/2023-01/msg00012.html (8,272 bytes)

10. Re: [TowerTalk] Antenna Traps? (score: 1)
Author: <john@kk9a.com>
Date: Sun, 1 Jan 2023 23:20:12 -0500
Jim, are these fan dipoles? I am not understanding how a loading coils will make a dipole work on two bands. John KK9A They are NOT traps, they are loading coils. I've used them, measured them, and m
/archives//html/Towertalk/2023-01/msg00013.html (8,579 bytes)

11. Re: [TowerTalk] Antenna Traps? (score: 1)
Author: Brian Beezley <k6sti@att.net>
Date: Mon, 2 Jan 2023 14:51:57 -0800
I tried optimizing a loaded dipole for 3.525 and 7.025 MHz. I used an RLC load to properly represent a self-resonant coil. After optimization, the load wound up out 40.5' on a 53.9' wire (one side of
/archives//html/Towertalk/2023-01/msg00016.html (9,406 bytes)

12. Re: [TowerTalk] Antenna Traps? (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Mon, 2 Jan 2023 18:15:41 -0500
At 7.025 MHz you can think of this antenna as a shortened, resonant, 3/2-wavelength dipole. Does the pattern show the typical narrow main lobe with substantial quartering lobes of a 3/2 wavelength di
/archives//html/Towertalk/2023-01/msg00017.html (10,524 bytes)

13. Re: [TowerTalk] Antenna Traps? (score: 1)
Author: Brian Beezley <k6sti@att.net>
Date: Mon, 2 Jan 2023 15:36:28 -0800
I probably should have included this image of a full-length, resonant, 3/2-wavlength dipole: https://i.postimg.cc/2Sq0dJTd/full.gif Brian _______________________________________________ _____________
/archives//html/Towertalk/2023-01/msg00018.html (8,097 bytes)

14. Re: [TowerTalk] Antenna Traps? (score: 1)
Author: Jim Brown <jim@audiosystemsgroup.com>
Date: Mon, 2 Jan 2023 16:17:59 -0800
No, pattern looks like a resonant half wave on both bands. 73, Jim K9YC _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTal
/archives//html/Towertalk/2023-01/msg00019.html (8,808 bytes)

15. Re: [TowerTalk] Antenna Traps? (score: 1)
Author: Brian Beezley <k6sti@att.net>
Date: Mon, 2 Jan 2023 18:17:30 -0800
Since we're on the subject of loading coils, I wanted to pass along an interesting practical study of coil loss due to corrosion: https://www.w0qe.com/Technical_Topics/inductor_Q_tests.html I mention
/archives//html/Towertalk/2023-01/msg00020.html (8,730 bytes)

16. Re: [TowerTalk] Antenna Traps? (score: 1)
Author: Dan Maguire <danac6la@gmail.com>
Date: Mon, 2 Jan 2023 22:42:27 -0800
I wanted to see if I could duplicate Brian's results using a NEC engine. In a private email Brian told me, "The coil is 37.3 turns of values from COIL for the load." Using those dimensions here's wha
/archives//html/Towertalk/2023-01/msg00022.html (10,123 bytes)

17. Re: [TowerTalk] Antenna Traps? (score: 1)
Author: <john@kk9a.com>
Date: Tue, 3 Jan 2023 12:28:15 -0500
It's great to have such knowledgeable people here on towertalk including two antenna software developers. It is well worth the yearly subscription cost +++! John KK9A Dan Maguire I wanted to see if I
/archives//html/Towertalk/2023-01/msg00023.html (9,848 bytes)

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