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321. Re: [TowerTalk] 160M Inverted L (score: 1): Author: "David L. Thompson" <thompson@mindspring.com>; Date: Sat, 3 Jan 2004 00:22:20 -0500; If you can get 160 to 170 feet instead of 135 feet (3/8 wave rather than 1/4 wave) you get a much closer match to 50 ohms plus move the radiation point up the L instead of being at ground level. If y; /archives//html/Towertalk/2004-01/msg00041.html (7,912 bytes)
322. Re: [TowerTalk] CC&R's (score: 1): Author: "David L. Thompson" <thompson@mindspring.com>; Date: Sat, 3 Jan 2004 22:35:07 -0500; Wait a minute. K4BAI and W4UCK (both Judges!!) told us that its illegal to add restrictive rules after the fact except where they (HOA) had let them expire. This may be the case. In either case the l; /archives//html/Towertalk/2004-01/msg00056.html (9,129 bytes)
323. [TowerTalk] Isotruss towers (score: 1): Author: "David L. Thompson" <thompson@mindspring.com>; Date: Thu, 15 Jan 2004 16:57:22 -0500; Looking through the reviews on eHam there is a listing for Isotruss towers out of Utah. Their web page is impressive but there are no reviews so far. They build non metal towers of space age material; /archives//html/Towertalk/2004-01/msg00254.html (7,391 bytes)
324. [TowerTalk] Re: Isotruss towers (score: 1): Author: "David L. Thompson" <thompson@mindspring.com>; Date: Fri, 16 Jan 2004 16:24:33 -0500; I have gotten many replies but no one seems to have one of these. Go to eHam (W4AN's great web page) and look under reviews for towers. The link there goes right to the towers. Selected models are sh; /archives//html/Towertalk/2004-01/msg00286.html (8,732 bytes)
325. Re: [TowerTalk] Beam height suggestions wanted (score: 1): Author: "David L. Thompson" <thompson@mindspring.com>; Date: Wed, 4 Feb 2004 01:43:24 -0500; I won the ARRL SS three times with a tri-bander at 48 feet and wires. Once I got my 72 foot tower I found that hams at 40 to 50 feet would beat me out to Central America. That is why multi ops have s; /archives//html/Towertalk/2004-02/msg00069.html (8,133 bytes)
326. Re: [TowerTalk] Rotator Control Box on Ebay (score: 1): Author: "David L. Thompson" <thompson@mindspring.com>; Date: Wed, 4 Feb 2004 16:01:39 -0500; I looked at the W0MLY, Telrex, and Johnson (yes Johnson made a big rotor and beams). I suspect its a home brew or perhaps made by a ham name Bob Leo who sold prop pitch rotors in the mid 1970's (he w; /archives//html/Towertalk/2004-02/msg00084.html (8,385 bytes)
327. Re: [TowerTalk] One Man Tower (score: 1): Author: "David L. Thompson" <thompson@mindspring.com>; Date: Wed, 18 Feb 2004 16:25:49 -0500; I seem to remember the Strumtech towers are related to the German Versatower. We looked at bringing them stateside along with the Fritzel antennas at Electronic Switch. Shiping was the main obstacle.; /archives//html/Towertalk/2004-02/msg00344.html (9,089 bytes)
328. Re: [TowerTalk] W6AM book availability (score: 1): Author: "David L. Thompson" <thompson@mindspring.com>; Date: Fri, 27 Feb 2004 16:15:38 -0500; One of the things that got me interested in the ARRL Phone SS (AM phone not SSB) was the operation by W6FRW at W6AM. It appears he operated in 1954 and 55 along with 1956. He ran away with the phone; /archives//html/Towertalk/2004-02/msg00583.html (8,556 bytes)
329. [TowerTalk] Re: [SECC] FW: A Response From Johnny Isakson (score: 1): Author: "David L. Thompson" <thompson@mindspring.com>; Date: Thu, 11 Mar 2004 16:59:10 -0500; Remember Mr. Isakson comes from a background in real estate sales. He was President of Northside Realty before running for office. His nest egg is from (and probably still) depends on real estate val; /archives//html/Towertalk/2004-03/msg00176.html (11,663 bytes)
330. Re: [TowerTalk] Windmill Towers (score: 1): Author: "David L. Thompson" <thompson@mindspring.com>; Date: Fri, 16 Apr 2004 16:24:29 -0400; Its probably because they are expensive. There was a major maker of 4 leg windmill type towers in the USA 30 years ago called Vesto Towers. They ran ads in QST and CQ and most small airports still ha; /archives//html/Towertalk/2004-04/msg00288.html (9,763 bytes)
331. [TowerTalk] Cushcraft 2 el 40 design (score: 1): Author: "David L. Thompson" <thompson@mindspring.com>; Date: Sat, 1 May 2004 22:56:25 -0400; The discussion about the 402 CD reminds me the basic design for the beam was published in the ARRL Antenna book about 1980. What is shown is a 3 el 36 foot boom with coil and capacity hat. The 2 el v; /archives//html/Towertalk/2004-05/msg00014.html (7,364 bytes)
332. Re: [TowerTalk] Class 2 and Class 7 Poles (score: 1): Author: "David L. Thompson" <thompson@mindspring.com>; Date: Mon, 17 May 2004 17:06:53 -0400; The late 1950's and early 1960's ARRL Antenna books have a very good scheme for mounting a beam on a telephone pole. I used this design with several antennas from 1958 to 1970. There was also an arti; /archives//html/Towertalk/2004-05/msg00341.html (10,262 bytes)
333. [TowerTalk] Using telephone (power) poles (score: 1): Author: "David L. Thompson" <thompson@mindspring.com>; Date: Wed, 19 May 2004 16:28:54 -0400; Here is a list of articles on using a pole as a mast for a beam or quad. The only article on actually mounting an antenna on the pole was in QST, June 1957 starting on page 32. This is the method I u; /archives//html/Towertalk/2004-05/msg00376.html (7,606 bytes)
334. [TowerTalk] wall or eve mounts wanted (score: 1): Author: "David L. Thompson" <thompson@mindspring.com>; Date: Wed, 2 Jun 2004 15:57:09 -0400; I am looking for two wall or eve mounts. At one time Rohn made them to accept the bottom section of the push up masts. I need the type that accepts at least 2" and better yet are 2.5" as I am going t; /archives//html/Towertalk/2004-06/msg00031.html (7,145 bytes)
335. Re: [TowerTalk] URI physics employee invents new antenna technology (score: 1): Author: "David L. Thompson" <thompson@mindspring.com>; Date: Mon, 7 Jun 2004 20:35:23 -0400; I think someone identified him as K1DFT. He has done well on 160 the past couple of CQ 160 Contests. Wonder if he used a 160 meter version of this antenna?? Dave K4JRB _______________________________; /archives//html/Towertalk/2004-06/msg00132.html (7,876 bytes)
336. [TowerTalk] Log periodics and Tri-Banders (score: 1): Author: "David L. Thompson" <thompson@mindspring.com>; Date: Wed, 23 Jun 2004 13:53:12 -0400; Oliver Swan did some work that forever changed the definition of what is a log and what is a tri-bander. The bulk of his work was on VHF but he adapted it for KLM. Several tri-banders outside of KLM/; /archives//html/Towertalk/2004-06/msg00536.html (7,236 bytes)
337. Re: [TowerTalk] Home Brew 40m "shortie" (score: 1): Author: "David L. Thompson" <thompson@mindspring.com>; Date: Thu, 24 Jun 2004 22:35:58 -0400; The best shortie beam I remember was in ARRL literature in the early 70's...may still have been in the 1980 ARRL antenna book. The 3 el shortie that looks amazingly like the Cushcraft 2 el 40. The 3; /archives//html/Towertalk/2004-06/msg00559.html (7,701 bytes)
338. Re: [TowerTalk] Crank up tower on its side (score: 1): Author: "David Thompson" <thompson@mindspring.com>; Date: Sun, 25 Jul 2004 15:14:53 -0400; roof I used to use the tower raising fixture to add my antennas (I always used blocks under the tower for extra support) then raise it to vertical and finally crank it up. My tower is a Tristao (now; /archives//html/Towertalk/2004-07/msg00727.html (8,000 bytes)
339. Re: [TowerTalk] 160/80/40 (score: 1): Author: "David Thompson" <thompson@mindspring.com>; Date: Sat, 21 Aug 2004 21:45:30 -0400; Ed, K4SB had an article in a magazine back in the late 70's when he was K4DJC. He added a mast on top of the tower with a rotating fixture so he could get any wire antenna 25 feet above the tower rat; /archives//html/Towertalk/2004-08/msg00422.html (7,998 bytes)
340. Re: [TowerTalk] 6m Yagi (score: 1): Author: "David Thompson" <thompson@mindspring.com>; Date: Thu, 9 Sep 2004 13:57:39 -0400; Both Hy-Gain and Cushcraft have manuals available on their web site. Just make sure you have a good printer (high density) so you can read the small print and dimensions. I got the 5 and 6 el manuals; /archives//html/Towertalk/2004-09/msg00144.html (7,741 bytes)

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