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121. Rotor Repair (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Wed, 27 Nov 1996 18:43:23 -0500 (EST); Hi Lee! Most of the locals use Norm's Rotor Service. Norm typically turns repairs around in a few days, and he does a great deal of business via UPS. He also has a unique swap service, where he will; /archives//html/Towertalk/1996-11/msg00236.html (7,059 bytes)
122. Grounding parasitic elements on KT34XA (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Sun, 6 Oct 1996 23:52:37 -0400 (EDT); Lynn, I'd advise against it, or at least recommend that you document the VSWR bandwidth and F/B performance of the antenna before and after your proposed modification to be sure that no unintended de; /archives//html/Towertalk/1996-10/msg00073.html (8,060 bytes)
123. 40-2CD proximity to 20-4CD (fwd) (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Mon, 14 Oct 1996 21:18:21 -0400 (EDT); Hi Tony! I suspect the entire structure of your your 20-4CD antenna (boom plus uninsulated elements) has a nice 40 meter resonance! Twenty years ago I had a similar experience with a 40 meter full si; /archives//html/Towertalk/1996-10/msg00161.html (7,683 bytes)
124. Guy supports (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Tue, 15 Oct 1996 11:26:45 -0400 (EDT); Mike, Pipe is a terrible choice for elevated guy supports, unless you can get it very strong pipe very cheap! Pipe is best used for compressive loads, such as a load bearing column, or in a mast. For; /archives//html/Towertalk/1996-10/msg00174.html (8,519 bytes)
125. Are all black Zip cable ties UV resistant? (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Sat, 19 Oct 1996 00:31:17 -0400 (EDT); Scotch 88 is an expensive but incredibly durable tape. I applied some to my 40M 3 element beam in 1973 (yes... 1973!) and it is still intact after 23 years of exposure to the weather. Like any tape,; /archives//html/Towertalk/1996-10/msg00246.html (9,151 bytes)
126. Hardline and Rotors (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Sat, 19 Oct 1996 12:13:39 -0400 (EDT); The Andrew Catalog clearly states that LDF4-50A (1/2 inch Andrew Heliax) is rated for 15 bends minimum, and 50 bends typical. Unless you are planning to rotate your antenna less than 50 times, Heliax; /archives//html/Towertalk/1996-10/msg00250.html (7,353 bytes)
127. mast (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Sun, 20 Oct 1996 10:05:09 -0400 (EDT); Jeff, Given your bad experiences with water pipe masts, I can't imagine why you want to use water pipe again and "don't have time" to use material designed for mechanical use instead of water! You li; /archives//html/Towertalk/1996-10/msg00259.html (8,478 bytes)
128. wiretalk (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Wed, 23 Oct 1996 20:14:53 -0400 (EDT); Barry, I purchased two thousand feet of #12 stranded (19 strands) copperweld wire from "The Wireman" several years ago. Only three months later I removed one of the antennas and discovered significan; /archives//html/Towertalk/1996-10/msg00302.html (7,657 bytes)
129. WTB Fiberglas rod or information on supplier (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Mon, 30 Sep 1996 23:41:54 -0400 (EDT); Larry, I'd suggest you try the USA's best mail order hardware store! If you are into building or maintaining towers or antennas (or about any other application requiring sophisticated hardware), you; /archives//html/Towertalk/1996-09/msg00003.html (7,279 bytes)
130. Grade LE Phenolic Insulators (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Mon, 2 Sep 1996 10:26:57 -0400 (EDT); For many years I've been using Grade LE phenolic plates in outdoor antenna applications, and many of these materials have been exposed to the weather continuously for over 25 years! Grade LE phenolic; /archives//html/Towertalk/1996-09/msg00020.html (8,209 bytes)
131. Protecting tower/concrete interface? (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Thu, 5 Sep 1996 07:39:02 -0400 (EDT); Hi Kirk! I had the same problem and significant rust had developed before I discovered it! Here's what I did: - Firstly, you must (MUST!) remove ALL rust at the tower/concrete interface. I used a sta; /archives//html/Towertalk/1996-09/msg00043.html (7,987 bytes)
132. Aliance Model 72 Rotor Controler needed (fwd) (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Sat, 7 Sep 1996 17:10:58 -0400 (EDT); Bryan, Alliance's entire stock or rotors, control boxes and spare parts (several truck loads) was recently purchased by Norm's Rotor Service. You can reach Norm at: 301-874-5885 (M-F 0800-1630) 73 Fr; /archives//html/Towertalk/1996-09/msg00067.html (6,981 bytes)
133. Epoxy Primer on Galvanized Metal (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Tue, 17 Sep 1996 09:34:55 -0400 (EDT); Joe, The American Galvanizers Association has an excellent --FREE-- publication titled "Painting Galvanized Structural Steel." You can obtain a copy by calling them at (303)750-2900, by filling out t; /archives//html/Towertalk/1996-09/msg00136.html (9,830 bytes)
134. Epoxy Primer on Galvanized Metal (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Sat, 21 Sep 1996 08:51:19 -0400 (EDT); Stan, Unfortunately, while your Dad's trick undoubtably did work, vinegar is an acid that also took away some of the remaining life of the galvanized surface! Modern painting systems allow galvanized; /archives//html/Towertalk/1996-09/msg00165.html (8,702 bytes)
135. Cement curing time.... (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Wed, 25 Sep 1996 20:16:08 -0400 (EDT); Tom, I wonder why have u have chosen to use a sonotube? Pouring concrete directly into a properly sized hole surrounded by undisturbed soil is the proper method. The sonotube must be backfilled rathe; /archives//html/Towertalk/1996-09/msg00198.html (8,130 bytes)
136. Cement curing time.... (fwd) (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Thu, 26 Sep 1996 07:50:25 -0400 (EDT); More background on "Concrete" curing time. Some years ago I worked for a company that made huge steel reinforced concrete pipe for water/sewer transmission purposes. Concrete curing time and conditio; /archives//html/Towertalk/1996-09/msg00205.html (8,422 bytes)
137. Loos Model A or B Calibration Chart (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Thu, 26 Sep 1996 08:02:10 -0400 (EDT); Hi Walt! SCALE 3/16 7/32 1/4 9/32 10 240 15 320 18 380 20 420 300 22 480 360 24 540 410 250 26 620 480 280 28 740 560 340 30 880 660 400 32 1080 780 480 34 1400 960 580 36 1210 680 38 1600 840 400 39; /archives//html/Towertalk/1996-09/msg00206.html (7,678 bytes)
138. Baluns (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Sat, 31 Aug 1996 10:06:12 -0400 (EDT); Jim, Can you describe why you are not happy with your coaxial choke balun? 73! Frank W3LPL donovanf@sgate.com; /archives//html/Towertalk/1996-08/msg00288.html (6,901 bytes)
139. WARNING! Re: Summary: Tower Help (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Sat, 31 Aug 1996 10:14:51 -0400 (EDT); I agree, tower regalvanizing is a good deal, and relatively inexpensive compared to the cost of new tower. The American Galvanizing Association has an excellent WWW homepage that lists all of their m; /archives//html/Towertalk/1996-08/msg00289.html (7,569 bytes)
140. Tower "De-tuning" (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Fri, 5 Jul 1996 09:59:37 -0400 (EDT); Hello Lex! I detune my towers so that they do not interfere with nearby HF vertical arrays. I'm not sure that this will be helpful in your application of trying to avoid receiver overload from a near; /archives//html/Towertalk/1996-07/msg00040.html (8,349 bytes)

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