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81. [TowerTalk] Verticals of Rohn 25 (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Wed, 23 Apr 1997 20:20:00 -0400 (EDT); As a matter of interest to Towertalkians, the new version of EIA/TIA-222 specifies that copper wire SHALL NOT be used for ground wires, ground rods or ground clamps. All new towers installed under EI; /archives//html/Towertalk/1997-04/msg00750.html (9,241 bytes)
82. [TowerTalk] New Tower Grounding Spec (ANSI/EIA/TIA-222-F Jun 96) (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Thu, 24 Apr 1997 06:32:38 -0400 (EDT); Several Towertalkians asked that I repost this under a more appropriate subject, so that more readers might be enticed to read it! Hopefully others will share their experiences with corrosion of guy; /archives//html/Towertalk/1997-04/msg00760.html (8,888 bytes)
83. [TowerTalk] Gamma vs balanced feed meathod (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Tue, 29 Apr 1997 06:12:07 -0400 (EDT); Hi Bill! I've used dozens of gamma, beta and T-matches and I've never been able to discern any observable difference in electrical performance. I've settled on the T-match for all of my big Yagis bec; /archives//html/Towertalk/1997-04/msg00912.html (8,922 bytes)
84. [TowerTalk] Spring Tower Inspection & Maintenance! -Reply (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Mon, 31 Mar 1997 20:59:52 -0500 (EST); Hi Bryan! I just examined the broken guy wire and it appears that the wire was not adequately snugged around the "fist" in the anchor (the closest Crosby clip was 12 inches from the anchor!). There i; /archives//html/Towertalk/1997-03/msg00000.html (9,903 bytes)
85. [TowerTalk] Rain Static - Anything to Do? (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Sun, 2 Mar 1997 21:21:29 -0500 (EST); Pete, We also had severe precipitation static. It only affects my 200 foot high antennas, and we can listen in peace on the lower antennas and Beverages, so it did not affect our score at all (I wish; /archives//html/Towertalk/1997-03/msg00025.html (8,414 bytes)
86. [TowerTalk] W3LPL 5 element 48' boom Yagi with T-Match (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Sun, 9 Mar 1997 16:13:41 -0500 (EST); W4RNL performed this analysis of the T-match feed of my 5 element 20M Yagis that I thought might be of interest to some Towertalkians. Although LB's work may represent the state-of-the-art in modelli; /archives//html/Towertalk/1997-03/msg00102.html (14,286 bytes)
87. [TowerTalk] Painting a used EZ Way crankup tower (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Mon, 10 Mar 1997 07:06:46 -0500 (EST); Scott, I recommend cold galvanizing and painting over the cold galvanize. I also recommend that you NOT sandblast the tower unless its absolutely necessary because you will lose even more galvanizing; /archives//html/Towertalk/1997-03/msg00110.html (7,579 bytes)
88. [TowerTalk] AB-105 (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Tue, 11 Mar 1997 07:12:40 -0500 (EST); There is another interesting AB-105 manual: "Instruction for Increasing the height of antenna Supports AB-105C/FRC Department of the Army dated April 1957 This describes mainly guying requirements fo; /archives//html/Towertalk/1997-03/msg00151.html (7,053 bytes)
89. [TowerTalk] Fiberglass guys (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Thu, 20 Mar 1997 19:21:15 -0500 (EST); Pat, I use Polygon fiberglas rod for most of my guys (aproximately 90 guys on 8 towers). Among the advantages: - Fiberglas guy rod costs about half the cost of Phillystran (tm) of the same strength.; /archives//html/Towertalk/1997-03/msg00307.html (8,306 bytes)
90. [TowerTalk] RE: Using Silicone Grease (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Mon, 24 Mar 1997 21:37:01 -0500 (EST); Many of my AB-105 towers and much of my hardline came from a decomissioned over-the-horizon radar facility in Whitehouse, VA near Williamsburg. All of their RF connectors were stuffed with dielectric; /archives//html/Towertalk/1997-03/msg00482.html (9,710 bytes)
91. [TowerTalk] Spring Tower Inspection & Maintenance! (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Sun, 30 Mar 1997 20:40:13 -0500 (EST); Every Spring and Fall I inspect my towers and antennas thoroughly so that I can plan needed corrective work during the rest of the year. With high winds expected tomorrow and a beautiful warm sunny d; /archives//html/Towertalk/1997-03/msg00707.html (8,876 bytes)
92. Tower Failure Tales (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Sat, 8 Feb 1997 11:10:15 -0500 (EST); This is the story of the near failure of three 200 foot AB-105 towers at W3LPL 24 hours before the 1994 ARRL DX Phone Contest. For about 12 hours during the thursday before the contest, the temperatu; /archives//html/Towertalk/1997-02/msg00147.html (9,802 bytes)
93. Misphasing stacks (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Thu, 13 Feb 1997 07:14:04 -0500 (EST); A clear disadvantage of phase reversal schemes is that the ALL discriminate AGAINST low angle radiation. I've tried several of these schemes at my station, and found them useful only for breaking the; /archives//html/Towertalk/1997-02/msg00290.html (8,219 bytes)
94. Misphasing stacks (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Thu, 13 Feb 1997 20:38:08 -0500 (EST); Hi Howard! Thwe optimum spacing of a pair of stacked Yagis depends on what you are trying to achieve... Many popular stacked Yagi designs place the lower antenna at half the height of the upper anten; /archives//html/Towertalk/1997-02/msg00314.html (7,178 bytes)
95. Stacks (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Tue, 18 Feb 1997 07:16:14 -0500 (EST); Hi Dick! I'd suggest you use EZNEC to try some stacking alternatives! EZNEC is inexpensive and easy to use. I use the following heights for my two Yagi stacks: 40M: 3 element full size Yagis on 48 fo; /archives//html/Towertalk/1997-02/msg00378.html (7,543 bytes)
96. Stacks (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Tue, 18 Feb 1997 20:15:52 -0500 (EST); Hi Mike! Thanx very much for the unsolicited report! We worked nearly 1000 European QSOs on 80M. Conditions on 80M were ideal for our antennas. We have four horizontally polarized 2 element quads at; /archives//html/Towertalk/1997-02/msg00398.html (7,363 bytes)
97. YO File for 20 & 15 meter yagis (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Tue, 18 Feb 1997 22:36:10 -0500 (EST); Hi Chuck, Here is the YO file for my 20M 5 element Yagi on a 48 foot boom. I have five of these antennas and they work great! This is a compromise design for CW and SSB, with good gain, F/B and VSWR; /archives//html/Towertalk/1997-02/msg00403.html (8,309 bytes)
98. Stacks (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Wed, 19 Feb 1997 07:07:13 -0500 (EST); Peter, Your question is best answered by running an antenna model of your proposed configuration. Perhaps one of the towertalkians has modelled the C3 or C4 and can help you. I hate to make guesses a; /archives//html/Towertalk/1997-02/msg00406.html (7,289 bytes)
99. [TowerTalk] Re: gamma's (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Sat, 22 Feb 1997 10:22:30 -0500 (EST); Hi Chuck, It's not necessary to use capacitors in a T-match. I've always been able to find a combination of driven element length and T-match rod length, spacing and diameter that produce excellent V; /archives//html/Towertalk/1997-02/msg00453.html (8,489 bytes)
100. [TowerTalk] 20 Metre Yagi Designs (score: 1): Author: donovanf@sgate.com (Frank Donovan); Date: Sun, 23 Feb 1997 14:48:28 -0500 (EST); David, Here is the YO file for my 20 meter Yagis. They are on 48 foot booms. I stack a pair of these at 50 and 100 feet. I would not recommend stacking them at 70 and 140 feet because much of the tim; /archives//html/Towertalk/1997-02/msg00466.html (8,187 bytes)

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