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1. [TowerTalk] Trap resonance (score: 1): Author: S56A@S55TCP.ampr.org (Marijan Miletic); Date: Mon, 11 Aug 97 15:01:06 EDT; W4RNL gives advice on traped dipole for 160 and 80m and sugests tuning trap for resonance on 3,4 MHz, well bellow 80m band? I'll assume that 3,75 MHz figure would be much better for wide USA 80m band; /archives//html/Towertalk/1997-08/msg00392.html (8,410 bytes)
2. [TowerTalk] Trap resonance (score: 1): Author: cebik@utkux.utcc.utk.edu (L. B. Cebik); Date: Mon, 11 Aug 1997 11:52:22 -0400 (EDT); The selection of a frequency below the higher band limit is for a reason: to equalize the gains of the antennas. Selecting a frequency for the trap within or at the low end of the upper band results; /archives//html/Towertalk/1997-08/msg00396.html (9,358 bytes)
3. [TowerTalk] Trap resonance (score: 1): Author: seay@Alaska.NET (Del Seay, KL7HF); Date: Mon, 11 Aug 1997 07:59:22 -0800 (AKDT); Thanks, L.B. I wondered why they did that. HyGain triband antennas use traps resonant way below each band and it never made sense to me before. Very interesting. de KL7HF -- FAQ on WWW: http://www.co; /archives//html/Towertalk/1997-08/msg00397.html (8,399 bytes)
4. [TowerTalk] Trap Resonance (score: 1): Author: p.cattell@qut.edu.au (Peter Cattell); Date: Tue, 12 Aug 1997 14:13:52 +1000 (EST); Gi'day from 'down under', I have been reading postings from this group with much interest for the last 2 months. This is my first post. I bought a few weeks ago a Hy-Gain TH6 DXX Thunderbird Yagi. I; /archives//html/Towertalk/1997-08/msg00409.html (9,010 bytes)
5. [TowerTalk] Trap Resonance (score: 1): Author: mwalker@geronimo.Legato.COM (Mike Walker); Date: Tue, 12 Aug 1997 08:47:39 -0400; Hi Peter I'm just going through the same thing. 10M traps 27.6Mhz 15M traps 20.6Mhz (the above information is from Hygains web page) You should use a grid dip meter to do the testing, but I could use; /archives//html/Towertalk/1997-08/msg00411.html (9,751 bytes)
6. [TowerTalk] Trap Resonance (score: 1): Author: k1vr@juno.com (Fred Hopengarten); Date: Tue, 12 Aug 1997 12:35:20 EDT; I've brought two TH6's back to life in my career. So I thought I'd throw in some remarks. During manufacturing, a "dimple" or two is created to keep the trap sleeve in place. The dimple is the equiva; /archives//html/Towertalk/1997-08/msg00420.html (10,466 bytes)
7. [TowerTalk] Trap Resonance (score: 1): Author: w2up@itw.com (Barry Kutner); Date: Tue, 12 Aug 1997 13:25:01 +0000; When installed, drill a weephole for water to escape from the side facing down. The TH7 traps come with weepholes. They cause a more or less constant drone from whistling in the wind. Anyone ever sol; /archives//html/Towertalk/1997-08/msg00421.html (8,804 bytes)
8. [TowerTalk] Trap Resonance (score: 1): Author: cattell@fit.qut.edu.au (Peter Cattell); Date: Thu, 14 Aug 1997 09:43:58 +1000; Jim, how did you measure the TH6 trap resonant frequencies? I tried using a Dip Meter. I wrapped 3 turns around the trap, 3-4 turns around the Dip Meter coil using the 16-45MHz range, and got no dip.; /archives//html/Towertalk/1997-08/msg00449.html (12,036 bytes)
9. [TowerTalk] Trap Resonance (score: 1): Author: wrt@eskimo.com (Bill Turner); Date: Wed, 13 Aug 1997 23:48:24 GMT; <><><><><><><><><><><><><><><><><><><><><><><><><><><><> The ends ARE connected for DC, but not for RF. Unless you have an accidental short in there, what you're measuring is the DC resistance of the; /archives//html/Towertalk/1997-08/msg00450.html (8,650 bytes)
10. [TowerTalk] Trap Resonance (score: 1): Author: "Ron & Madhavi" <mchilkuri@kasnet.com>; Date: Fri, 21 Nov 2003 08:04:30 -0500; I recently built a VERY SUCCESSFUL vertical for 40m which was capacitive loaded with a 2x2' brass welding rod top hat ! The overall length was 23' (a reduction of 10') and helped me elevate the feed; /archives//html/Towertalk/2003-11/msg00510.html (8,840 bytes)
11. Re: [TowerTalk] Trap Resonance (score: 1): Author: K3BU@aol.com; Date: Fri, 21 Nov 2003 10:11:14 EST; it should NOT be brought to resonance on and around the desired operating freq. So, where do I tune the trap? I could place it at 14.2 but 14.2 would be my desired operating freq!<< I would not rely; /archives//html/Towertalk/2003-11/msg00512.html (8,580 bytes)
12. Re: [TowerTalk] Trap Resonance (score: 1): Author: "Dan" <dhearn@ix.netcom.com>; Date: Fri, 21 Nov 2003 07:44:23 -0800; Hi Ron: The extreme variations in signal strength with your different configurations are difficult to explain and might be due to one of the following. 1. Large variations in SWR cause your transceiv; /archives//html/Towertalk/2003-11/msg00513.html (11,010 bytes)
13. Re: [TowerTalk] Trap Resonance (score: 1): Author: Red <RedHaines@centurytel.net>; Date: Fri, 21 Nov 2003 10:10:21 -0600; See "Optimizing Coaxial-cable traps", by Robert Sommer, N4UU, in December 1984 QST. I believe it is available on the ARRL web site (to members) and it is surely available on the ARRL QST CDs. I can p; /archives//html/Towertalk/2003-11/msg00514.html (8,271 bytes)
14. Re: [TowerTalk] Trap Resonance (score: 1): Author: "Michael Tope" <W4EF@dellroy.com>; Date: Fri, 21 Nov 2003 08:39:37 -0800; I don't believe Tom's assertions on loading coil taper or trap losses are based on "calculations". Yuri conveniently leaves out these facts so as to support his transparent (and pathological) dislike; /archives//html/Towertalk/2003-11/msg00517.html (11,941 bytes)
15. Re: [TowerTalk] Trap Resonance (score: 1): Author: "Ron & Madhavi" <mchilkuri@kasnet.com>; Date: Fri, 21 Nov 2003 12:30:47 -0500; Ooooops! As a new subscriber to this group, I wasn't aware that a debate to this effect had taken place! I appreciate and value ALL the feedback that I have received. One gentleman suggested a parall; /archives//html/Towertalk/2003-11/msg00523.html (9,379 bytes)
16. Re: [TowerTalk] Trap Resonance (score: 1): Author: Ron Feutz <feutz@wctc.net>; Date: Fri, 21 Nov 2003 12:52:18 -0600; that it should NOT be brought to resonance on and around the desired operating freq. So, where do I tune the trap? I could place it at 14.2 but 14.2 would be my desired operating freq!<< I would not; /archives//html/Towertalk/2003-11/msg00526.html (10,158 bytes)
17. Re: [TowerTalk] Trap Resonance (score: 1): Author: "James McLaughlin" <dearborn9@sbcglobal.net>; Date: Fri, 21 Nov 2003 14:18:29 -0600; Yes, semi annual three round non title event! Jim suggests would of someone Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA. __________; /archives//html/Towertalk/2003-11/msg00527.html (11,632 bytes)
18. Re: [TowerTalk] Trap Resonance (score: 1): Author: K3BU@aol.com; Date: Fri, 21 Nov 2003 19:06:44 EST; As usual, Yuri, presents a one-sided look at a two-sided debate. He seems to think that science is done like politics - smear your opponent and only tell one-side of the story. Pathetic! 73 de Mike,; /archives//html/Towertalk/2003-11/msg00528.html (9,169 bytes)
19. RE: [TowerTalk] Trap Resonance (score: 1): Author: "Joe Subich, K4IK" <k4ik@subich.com>; Date: Fri, 21 Nov 2003 19:57:51 -0500; Get off your high horse. In a series circuit, which a loading coil most certainly is, the current into and the current out of a device must be the same. In the RF circuit, if the current into and out; /archives//html/Towertalk/2003-11/msg00531.html (10,169 bytes)
20. Re: [TowerTalk] Trap Resonance (score: 1): Author: K3BU@aol.com; Date: Fri, 21 Nov 2003 20:12:41 EST; ANY measured difference in I(in) vs. I(out) is either due to one of those three effects and to argue otherwise is to argue for perpetual motion. Yep, and the Earth is flat! __________________________; /archives//html/Towertalk/2003-11/msg00532.html (8,301 bytes)

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