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21. [Towertalk] Re: SteppIR Yagi Question (score: 1): Author: dhearn@ix.netcom.com (dan hearn); Date: Thu, 19 Dec 2002 12:26:34 -0800; Dick, failure of the parasitic element(s) should result in a poor f/b ratio. I would make a check with a local friend of f/b when the ant is first installed and use that as a reference. SWR is useles; /archives//html/Towertalk/2002-12/msg00567.html (8,929 bytes)
22. [Towertalk] WHY?!!! (score: 1): Author: dhearn@ix.netcom.com (dan hearn); Date: Mon, 23 Dec 2002 22:23:39 -0800; Hi Dino: Your questions are certainly reasonable. 1. I do not believe dimension D is a critical one. The 1/4 wave open transmission line tap point for a transmission line match might be at a slightly; /archives//html/Towertalk/2002-12/msg00678.html (11,569 bytes)
23. [Towertalk] experience with vendor? (score: 1): Author: dhearn@ix.netcom.com (dan hearn); Date: Tue, 24 Dec 2002 16:19:55 -0800; Steve, out of curiosity, I compared their prices for common sizes of 0.058 wall tubing as used in telescoping yagi elements and booms with Texas Towers prices from the latest QST. TT is 1/2 to 1/3 th; /archives//html/Towertalk/2002-12/msg00702.html (7,827 bytes)
24. [Towertalk] Pro 57 (score: 1): Author: dhearn@ix.netcom.com (dan hearn); Date: Sat, 30 Nov 2002 18:01:30 -0800; I just finished helping a friend raise a Pro 57 yagi. When I looked it over, I noticed that it had a split driven element and was fed thru a coax balun. However, there was an aluminum strap connectin; /archives//html/Towertalk/2002-11/msg00004.html (7,173 bytes)
25. [Towertalk] 2 el phased verts (score: 1): Author: dhearn@ix.netcom.com (dan hearn); Date: Sat, 09 Nov 2002 11:53:24 -0800; I have been using exactly the setup you ask about for 4 yrs on 80m. I have 2 Hytower verticals spaced 1/2 wave. I feed them in phase for broadside coverage and 180 out of phase for end fire coverage.; /archives//html/Towertalk/2002-11/msg00157.html (7,405 bytes)
26. [Towertalk] Hy-Gain 204BA Rattle (score: 1): Author: dhearn@ix.netcom.com (dan hearn); Date: Tue, 12 Nov 2002 08:56:02 -0800; I have several times encountered swaged joints which, when tightened enough to close the slot,still did not grip the inside tubing well. In other words, the saw slot was too narrow. A hacksa;w solved; /archives//html/Towertalk/2002-11/msg00232.html (8,694 bytes)
27. [Towertalk] 2 element vertical phased arrays (score: 1): Author: dhearn@ix.netcom.com (dan hearn); Date: Sat, 16 Nov 2002 07:43:11 -0800; The commercial boxes generate signals which are 90 and 180 degrees from the input and are built to work with verticals which are spaced 1/4 and 1/2 wavelength. It is possible to build phased arrays w; /archives//html/Towertalk/2002-11/msg00375.html (8,631 bytes)
28. [Towertalk] IS Boom length the HOLY GRAIL ? (score: 1): Author: dhearn@ix.netcom.com (dan hearn); Date: Sat, 16 Nov 2002 13:40:44 -0800; In his 2 volume pair of books on Quads, Cebik shows that Quad efficiency can be improved significantly by using 1/2 inch tubing conductors. He looked at accomplishing the same improvement by using 2; /archives//html/Towertalk/2002-11/msg00392.html (19,578 bytes)
29. [Towertalk] Transco Switches (score: 1): Author: dhearn@ix.netcom.com (dan hearn); Date: Mon, 18 Nov 2002 07:43:11 -0800; I would appreciate any help in finding the HF power rating of 2 Transco switches. 1. PN 11880,sn 255 SPDT 115vac. Also has number 85152 on it. It is a latching job with a coil for closing and another; /archives//html/Towertalk/2002-11/msg00423.html (6,956 bytes)
30. [Towertalk] Antenna aluminum for Vhf/Uhf (score: 1): Author: dhearn@ix.netcom.com (dan hearn); Date: Thu, 03 Oct 2002 16:54:03 -0700; Several years ago when I lived in Dallas Texas towers stocked 3/16 and 1/4 rod for VHF antennas. They also had the insulating washers and spring clips for "thru the boom" elements. They even had kits; /archives//html/Towertalk/2002-10/msg00146.html (8,666 bytes)
31. [Towertalk] More crankup questions (score: 1): Author: dhearn@ix.netcom.com (dan hearn); Date: Wed, 09 Oct 2002 15:54:55 -0700; Bill: I have used 2 different US Towers as verticals over the years with NO indication of poor or intermittent contact. The combination of sliding metal contact between the sections plus the steel li; /archives//html/Towertalk/2002-10/msg00326.html (9,661 bytes)
32. [Towertalk] welding aluminum (score: 1): Author: dhearn@ix.netcom.com (dan hearn); Date: Fri, 11 Oct 2002 07:58:54 -0700; Hi Scott: When I lived in Dallas, I acquired some yagi elements from an engineer who worked for Rockwell/Collins . They were welded in 4 spots at each joint, not completely around the joint. There wa; /archives//html/Towertalk/2002-10/msg00402.html (9,771 bytes)
33. [Towertalk] Riveting (score: 1): Author: dhearn@ix.netcom.com (dan hearn); Date: Fri, 11 Oct 2002 15:01:27 -0700; They do and they supply it. Looks like No Alox. 73. Dan, N5AR; /archives//html/Towertalk/2002-10/msg00414.html (7,444 bytes)
34. [Towertalk] Plans for a crankup tower (score: 1): Author: dhearn@ix.netcom.com (dan hearn); Date: Mon, 14 Oct 2002 15:18:15 -0700; Hi Paul: I believe I can describe the ingeneous system used to raise and lower crank up towers. Lets assume that the tower does not have power pull down. This feature is nice if the wind is blowing b; /archives//html/Towertalk/2002-10/msg00484.html (9,674 bytes)
35. [Towertalk] Heliax (score: 1): Author: dhearn@ix.netcom.com (dan hearn); Date: Thu, 17 Oct 2002 08:24:30 -0700; 1. Has anyone ever had problems with buried Andrews Heliax? 2. Has anyone measured significant increase in attenuation with age for surface mounted Heliax? 73, Dan, N5AR; /archives//html/Towertalk/2002-10/msg00560.html (6,185 bytes)
36. [Towertalk] 20 Meter J Antenna and Noise (score: 1): Author: dhearn@ix.netcom.com (dan hearn); Date: Sun, 20 Oct 2002 19:07:05 -0700; Hi Bob: All devices which use a remote control to turn them on and off have an internal IR receiver operating and waiting for the IR from your remote to turn the rest of the set on. Some of them use; /archives//html/Towertalk/2002-10/msg00673.html (9,252 bytes)
37. [Towertalk] Shunt feed crank up (score: 1): Author: dhearn@ix.netcom.com (dan hearn); Date: Wed, 23 Oct 2002 20:07:27 -0700; Dana: I gamma feed my 131 ft crank up on 160. I have the coax arms with yagi coax and rotator cable runing down through them. I clamped a piece of square aluminum tubing to the mid level coax arm wit; /archives//html/Towertalk/2002-10/msg00741.html (7,871 bytes)
38. [Towertalk] MFJ 206 (score: 1): Author: dhearn@ix.netcom.com (dan hearn); Date: Sun, 01 Sep 2002 23:31:38 -0700; I have been thinking about building a RF current meter for measuring antenna coax outer shield current with different baluns. I plan to use a split ferrite sleeve core with a pickup winding, germaniu; /archives//html/Towertalk/2002-09/msg00072.html (6,664 bytes)
39. [Towertalk] Shunt Fed Tower 160/80 (score: 1): Author: dhearn@ix.netcom.com (dan hearn); Date: Wed, 04 Sep 2002 23:44:56 -0700; Jim: I have shunt fed 2 different crankup towers at various times and had no problems in either Dallas or Spokane. Neither are particularly corrosive climates. YMMV. I have seen no indications of int; /archives//html/Towertalk/2002-09/msg00192.html (8,838 bytes)
40. [Towertalk] Pattern (score: 1): Author: dhearn@ix.netcom.com (dan hearn); Date: Mon, 09 Sep 2002 17:36:02 -0700; I have recently acquired a good used KLM 20M6 (57 ft boom). I plan to put it at 140 ft and load the boom for 80m as a rotary dipole, after connecting the end elements to the boom. I have a 4 el 20 at; /archives//html/Towertalk/2002-09/msg00354.html (6,711 bytes)

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