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References: [ +from:jimjarvis@optonline.net: 284 ]

Total 284 documents matching your query.

201. Re: [TowerTalk] Desired play (gap) between steel tube leg and sleeve (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Wed, 25 Feb 2009 06:22:55 -0500
Crazyhorse: Interesting pic. I've SEEN this before, somewhere, but I'm not bringing up a name. Recommend you re-post to the reflector, with a link to that pic. Someone will know what it is. Guys: Cra
/archives//html/Towertalk/2009-02/msg00574.html (8,627 bytes)

202. [TowerTalk] ohn 45G - Swaged or welded sleeves on legs ?? (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Thu, 26 Feb 2009 10:23:11 -0500
Yo, Crazy! You're not getting it. 25g and 45g are identical in design. The difference between them is that 45G has an 18" face, and 25g has a 12" face. The legs are 1.25" diameter, swaged down on one
/archives//html/Towertalk/2009-02/msg00596.html (10,234 bytes)

203. Re: [TowerTalk] 45g (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Thu, 26 Feb 2009 11:51:53 -0500
OK, OK.... I got multiple off-reflector messages. MY 45g was swaged. Apparently there is some which is sleeved. I stand corrected. As for 70 lbs vs 90 lbs a section... it's somewhat irrelevant, if yo
/archives//html/Towertalk/2009-02/msg00601.html (6,847 bytes)

204. Re: [TowerTalk] ohn 45G - Swaged or welded sleeves on legs ?? (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Thu, 26 Feb 2009 16:47:53 -0500
I yield to your expertise, Gerry. (same for you, Steve) I am, however, perplexed, as the 45g I had in VT definitely did not have a sleeve. Neither did two other 45g towers that I was involved in erec
/archives//html/Towertalk/2009-02/msg00610.html (13,240 bytes)

205. Re: [TowerTalk] isotron (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Sun, 01 Mar 2009 15:20:16 -0500
If it sounds too good to be true, it is. Best bet for an apartment is to get yourself some small enameled wire, like trees, or if on an upper floor, to dangle it down, and use a tuner. I operated fro
/archives//html/Towertalk/2009-03/msg00014.html (7,153 bytes)

206. Re: [TowerTalk] Tennadyne (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Tue, 03 Mar 2009 06:55:24 -0500
Ron, I replaced my kt34a with a T8, some years ago. It played about the same, but got me 17 and 12m. No tuning required. under 2:1 across all bands. I MIGHT have suffered a small reduction in f/b on
/archives//html/Towertalk/2009-03/msg00047.html (7,038 bytes)

207. Re: [TowerTalk] phasing verticals (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Tue, 10 Mar 2009 11:46:33 -0400
If there's a reason for phasing at the antenna, it's that storing the phasing lines inside the shack can impact available space. But it's a much better solution than switching at the antenna, for rea
/archives//html/Towertalk/2009-03/msg00219.html (7,014 bytes)

208. Re: [TowerTalk] phased vertical follow up (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Sat, 14 Mar 2009 07:31:11 -0400
In the "all threads drift astray, eventually" department... To which I will append: The best thing I ever did with a 14AVQ was convert it to a 33' tapered piece of aluminum, and put it on top of a 50
/archives//html/Towertalk/2009-03/msg00338.html (7,107 bytes)

209. Re: [TowerTalk] vertical in pond (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Wed, 18 Mar 2009 13:42:35 -0400
The issue of a freshwater pond being a better location than rocky soil has been discussed at length. While the pond itself might not be highly conductive, the mud around it is a lot better than dry d
/archives//html/Towertalk/2009-03/msg00537.html (8,818 bytes)

210. Re: [TowerTalk] tuning A3s (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Thu, 19 Mar 2009 15:21:20 -0400
I threw a connector on the end and used the AEA analyzer with the tower standing up..not cranked up but at 21 ft..and it's still the same..low on all bands... On 20 lowest at 13900(1.63) , on 15M low
/archives//html/Towertalk/2009-03/msg00576.html (7,659 bytes)

211. Re: [TowerTalk] 75/80 vertical (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Sat, 21 Mar 2009 06:58:16 -0400
Gregg, 234/f says that a quarter wave on 3.8 is 61.58 feet. If it were me, I'd start putting in radials, and hook the thing up to the rig, or an antenna analyser, to see what you've got. Worst case,
/archives//html/Towertalk/2009-03/msg00615.html (8,724 bytes)

212. Re: [TowerTalk] 67' vertical (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Mon, 23 Mar 2009 15:20:51 -0400
I just got pricing from Bethlehem Aluminum for a nesting tubular vertical. .125" wall, 6061-T6, in diameters from 2.25 to 1.00, 12' lengths ran around $225 plus tax. That's without any clamps, cleanu
/archives//html/Towertalk/2009-03/msg00641.html (7,554 bytes)

213. Re: [TowerTalk] 67' vertical (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Mon, 23 Mar 2009 16:18:27 -0400
Good point, Arne. I was looking for first-order estimates of price, not final design. Tubing is priced by the pound. So using thinner wall would save some money. .058 wall seems a tad light to me, by
/archives//html/Towertalk/2009-03/msg00644.html (9,994 bytes)

214. Re: [TowerTalk] antenna mast guidelines (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Mon, 23 Mar 2009 22:42:14 -0400
An interesting discussion... regarding mast loading, and how much should be above the tower, versus inside.... K8RI wrote... " ... so going much above the top of the tower can add considerable force
/archives//html/Towertalk/2009-03/msg00662.html (8,026 bytes)

215. Re: [TowerTalk] 67' vertical (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Mon, 23 Mar 2009 22:44:38 -0400
I'll check with the vendor tmw & see what the price impact of 6063 vs. 6061 is. For those who asked, off-reflector, 6063 is bendable, 6061 is stiff. See Wikipedia for the metallurgy details. N2EA ___
/archives//html/Towertalk/2009-03/msg00663.html (7,968 bytes)

216. [TowerTalk] 6061 vs 6063 (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Tue, 24 Mar 2009 06:30:49 -0400
Since several asked about 6061 vs 6063 Aluminum, off reflector, I decided to do a bit of wikipedia research. The specific gravity of each is about the same; 6061 is 2.7, 6063 is 2.68. 6061-T6 T6 temp
/archives//html/Towertalk/2009-03/msg00669.html (8,609 bytes)

217. Re: [TowerTalk] 6061 vs 6063 (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Tue, 24 Mar 2009 10:40:37 -0400
I verified with the Al tube vendor the 6061/6063 question. They're both the same price. 6061 is stronger. but if you need to put a bend in the material, 6063 is what you want. 6061 will crack or oran
/archives//html/Towertalk/2009-03/msg00683.html (7,174 bytes)

218. Re: [TowerTalk] 6061 vs 6063 (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Tue, 24 Mar 2009 14:45:02 -0400
Dave, I haven't looked in a materials handbook to see the spec, so I'm only repeating what Bethlehem Aluminum and Wikipedia said. But I think you misread my comment. 6061 will spring.... it can be be
/archives//html/Towertalk/2009-03/msg00699.html (9,364 bytes)

219. Re: [TowerTalk] antenna tuning (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Sun, 29 Mar 2009 12:11:58 -0400
Bob, AD5VJ wrote: "... one of the antennas I will be working on in the morning is going to be an 80 Meter dipole, but I can only get it up here at abt 30' then I will be taking it and putting it up a
/archives//html/Towertalk/2009-03/msg00871.html (7,695 bytes)

220. Re: [TowerTalk] 'WWV halfwave vertical", was Vertical vs Beam (score: 1)
Author: jim Jarvis <jimjarvis@optonline.net>
Date: Mon, 06 Apr 2009 11:28:12 -0400
The WWV "halfwave" vertical is actually a quarter wave vertical with sloping, elevated radials. It can also be seen as a center fed half wave vertical dipole. No magic. I have personally used one of
/archives//html/Towertalk/2009-04/msg00121.html (9,728 bytes)

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