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141. Re: [TowerTalk] dog fence (score: 1): Author: jim Jarvis <jimjarvis@optonline.net>; Date: Fri, 11 Jul 2008 15:50:07 -0400; Holy Cow! I had forgotten about my experience. We installed an rf dog fence at our place in Vermont, when my daughter moved back home to go to grad school. A kw on 160 set off the collar. I keyed. He; /archives//html/Towertalk/2008-07/msg00322.html (8,016 bytes)
142. [TowerTalk] C3 value? (score: 1): Author: jim Jarvis <jimjarvis@optonline.net>; Date: Mon, 14 Jul 2008 13:41:10 -0400; TT: I just picked up a 12 year old Force 12 C3, in an estate/takedown situation. At the same time, I had two guys approach me, to buy it from me. At the moment, I'm undecided whether to put this up,; /archives//html/Towertalk/2008-07/msg00351.html (7,622 bytes)
143. [TowerTalk] tower disassembly (score: 1): Author: jim Jarvis <jimjarvis@optonline.net>; Date: Tue, 15 Jul 2008 07:55:35 -0400; TT: We're taking down 70' of rohn 25g, with a foldover section @ 30'. The tower is presently folded over, and has had antennas and rotor removed, so it's in the shape of a carot, or upside down V. Ra; /archives//html/Towertalk/2008-07/msg00381.html (7,614 bytes)
144. Re: [TowerTalk] tower takedown (score: 1): Author: jim Jarvis <jimjarvis@optonline.net>; Date: Tue, 15 Jul 2008 09:09:17 -0400; Thanks to Roger and George... We CAN bring this thing vertical, without killing ourselves. And if we're able to get the top section off, to permit swinging the upper section alongside the lower part; /archives//html/Towertalk/2008-07/msg00384.html (6,966 bytes)
145. Re: [TowerTalk] tower takedown (score: 1): Author: jim Jarvis <jimjarvis@optonline.net>; Date: Tue, 15 Jul 2008 17:05:07 -0400; OK... Thanks to all who commented on the 25g takedown. I got a couple of good ideas, and a few important reminders/caveats about safety and the value of bucket trucks. I value those. For the curious,; /archives//html/Towertalk/2008-07/msg00395.html (8,975 bytes)
146. Re: [TowerTalk] tower takedown (score: 1): Author: jim Jarvis <jimjarvis@optonline.net>; Date: Wed, 16 Jul 2008 12:35:15 -0400; A wt51 is probably too heavy to allow on top of a truck cab, unsupported. Similarly, in a layover situation, that 400 lbs (if that's the correct weight)... will be amplified by a 10' lever, and you'l; /archives//html/Towertalk/2008-07/msg00411.html (9,343 bytes)
147. Re: [TowerTalk] Tower Restrictions (score: 1): Author: jim Jarvis <jimjarvis@optonline.net>; Date: Sat, 19 Jul 2008 11:37:50 -0400; TT: Can we put this one to bed, now? Have we whipped it enough, yet? Are there more war stories to be told? The takeaway: * Legal compliance is recommended * Being a good neighbor is recommended * Ne; /archives//html/Towertalk/2008-07/msg00508.html (9,310 bytes)
148. Re: [TowerTalk] Tower Dogs (score: 1): Author: jim Jarvis <jimjarvis@optonline.net>; Date: Tue, 22 Jul 2008 21:17:06 -0400; I couldn't watch more than maybe 5 minutes of this idiocy. Came in late, as it was... but when they lowered the level on the weather side of the guy below, on that water tower, and were surprised tha; /archives//html/Towertalk/2008-07/msg00594.html (9,003 bytes)
149. [TowerTalk] Ham's best friend: Idiom Press (score: 1): Author: jim Jarvis <jimjarvis@optonline.net>; Date: Fri, 25 Jul 2008 13:05:04 -0400; Good Grief, you guys! It's a small business. It's going through a transition, and it underestimated inventory requirements going into Dayton. Big whoop. You could do better? We've seen the response o; /archives//html/Towertalk/2008-07/msg00664.html (7,410 bytes)
150. [TowerTalk] BeHappy Idiom Press (score: 1): Author: jim Jarvis <jimjarvis@optonline.net>; Date: Sat, 26 Jul 2008 13:22:57 -0400; Good news? That's GREAT news! But I never doubted it. They goofed on their Dayton inventory forecast, is all that happened. Where ELSE can we get this kind of stuff? Makes me want to run right out an; /archives//html/Towertalk/2008-07/msg00686.html (7,151 bytes)
151. [TowerTalk] Grounding mast? (score: 1): Author: jim Jarvis <jimjarvis@optonline.net>; Date: Wed, 30 Jul 2008 07:06:04 -0400; Been following the SteppIR v. Stepper.IT thread while travelling. Had a few minutes to browse both websites, this morning, and came across a short commentary about lightning and ESD protection for th; /archives//html/Towertalk/2008-07/msg00815.html (7,228 bytes)
152. Re: [TowerTalk] sealing conduit (score: 1): Author: jim Jarvis <jimjarvis@optonline.net>; Date: Fri, 1 Aug 2008 12:32:34 -0400; I've successfully used copper scrubbies, where the hole was out of the weather. kept the snakes and mice out. Where it's exposed, what's sold as "electrician's pug" is perfect. They use it to weather; /archives//html/Towertalk/2008-08/msg00002.html (7,109 bytes)
153. Re: [TowerTalk] mast material (score: 1): Author: jim Jarvis <jimjarvis@optonline.net>; Date: Wed, 06 Aug 2008 06:58:03 -0400; EMT is intended to be bent, not for its structural strength. It's purpose is to contain and protect electrical wiring. Ease of bending and lightness of weight for transportation are key attributes. I; /archives//html/Towertalk/2008-08/msg00140.html (7,706 bytes)
154. Re: [TowerTalk] radial length (score: 1): Author: jim Jarvis <jimjarvis@optonline.net>; Date: Wed, 27 Aug 2008 16:05:18 -0400; I googled "Maximum Gain Radial Ground Systems for Vertical Antennas" Excellent article by Al Christman, K3LC. I THINK he's the same Christman who wrote the article on elevated radials for AM stations; /archives//html/Towertalk/2008-08/msg00540.html (7,421 bytes)
155. Re: [TowerTalk] dipole ends: Tree attachments (score: 1): Author: jim Jarvis <jimjarvis@optonline.net>; Date: Fri, 29 Aug 2008 18:23:31 -0400; Wrapping anything AROUND a tree will girdle the outer layer, where the water uptake takes place. Although the idea of losing a bolt inside a tree is bad, in the long run, having a bolt in a tree won'; /archives//html/Towertalk/2008-08/msg00624.html (7,896 bytes)
156. Re: [TowerTalk] log periodic choice (score: 1): Author: jim Jarvis <jimjarvis@optonline.net>; Date: Fri, 12 Sep 2008 12:34:30 -0400; Having owned a Tennadyne T8, and a 3 el SteppIR, I think I can wade in on this discussion. First, although the T8 is essentially a 2 element beam on any band, as others have observed, it doesn't suff; /archives//html/Towertalk/2008-09/msg00200.html (9,974 bytes)
157. Re: [TowerTalk] log periodic choice (score: 1): Author: jim Jarvis <jimjarvis@optonline.net>; Date: Sat, 13 Sep 2008 12:27:35 -0400; My 3 el steppIR took less than 15 seconds to go from 14.000 to 29.000. I used it in a fully automated station, using "point & click" on my bandmap, to effect freq. changes during contests. It was mor; /archives//html/Towertalk/2008-09/msg00227.html (9,672 bytes)
158. Re: [TowerTalk] six pack problems (score: 1): Author: jim Jarvis <jimjarvis@optonline.net>; Date: Sun, 14 Sep 2008 14:36:25 -0400; TT: Jay and his wife Sharon are friends of ours. We've contested together, in the Carribean. Jay's word is as good as it gets. I would tend to believe that relay pull-in current is at fault in sketch; /archives//html/Towertalk/2008-09/msg00254.html (6,777 bytes)
159. Re: [TowerTalk] R7000 (score: 1): Author: jim Jarvis <jimjarvis@optonline.net>; Date: Mon, 15 Sep 2008 22:09:50 -0400; The R7000 is electrically 3/8 wavelength, with feedline decoupled by a choke/capacitor system. The 'radial' whips are there for capacitance. I had one up in Vermont, as a utility antenna, and had an; /archives//html/Towertalk/2008-09/msg00294.html (9,632 bytes)
160. Re: [TowerTalk] 'new' technique for feeding towers. (score: 1): Author: jim Jarvis <jimjarvis@optonline.net>; Date: Wed, 24 Sep 2008 12:49:17 -0400; The use of skirt wires is nothing new. It's simply a variant of a shunt feed, as described in the old handbooks. It's a good technique, though. In 1977, I used it to load a 500' FM/commercial tower o; /archives//html/Towertalk/2008-09/msg00494.html (8,540 bytes)

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