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Total 1919 documents matching your query.

161. Re: [TowerTalk] Where to get HFTA Software (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Sun, 4 Mar 2012 18:09:27 +0000
The database method will produce a table with rounded, uniform numbers in the distance column and interpolated heights; but when using a local topographic map it's probably easier to do it a differen
/archives//html/Towertalk/2012-03/msg00098.html (10,646 bytes)

162. Re: [TowerTalk] PL259 Insertion Loss? (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Tue, 17 Jan 2012 10:04:09 +0000
Somebody had to be first, and Mr E Clark Quackenbush [1] did a fine job... for its time, which was in the 1930s. But it's important to remember how long ago that was. That problem became apparent ver
/archives//html/Towertalk/2012-01/msg00328.html (11,192 bytes)

163. Re: [TowerTalk] PL259 Insertion Loss? (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Tue, 17 Jan 2012 08:24:01 +0000
Or even worse, the centre pin pushes *forward* and breaks the center pin of the fixed socket. That can easily happen with some types of cable, and then you have a rig to repair - or worse still, say
/archives//html/Towertalk/2012-01/msg00321.html (10,896 bytes)

164. Re: [TowerTalk] G-1000DXA failure with lower mast clamp (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Wed, 28 Dec 2011 08:11:06 +0000
Take care to use the right grade of Loctite. The blue liquid 242/243 should be fine for the three undamaged holes, as it is designed to be released with hand tools. For the fourth hole that doesn't
/archives//html/Towertalk/2011-12/msg00722.html (10,567 bytes)

165. Re: [TowerTalk] 300 MHz Remote Switch (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Tue, 20 Dec 2011 17:28:59 +0000
I did say "for a receive-only setup". Duplexing UHF on a HF transmitting coax requires more thought and planning to avoid overload or damage, but can certainly be done; and Pete's application with Be
/archives//html/Towertalk/2011-12/msg00481.html (9,031 bytes)

166. Re: [TowerTalk] 300 MHz Remote Switch (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Tue, 20 Dec 2011 14:02:09 +0000
For a receive-only setup, you could easily run the 315/433MHz control signal up the coax, along with 12V DC power and the returning signals from the Beverages. A few inches of wire threaded under the
/archives//html/Towertalk/2011-12/msg00475.html (9,136 bytes)

167. Re: [TowerTalk] Rotatorplate (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Sat, 17 Dec 2011 08:44:36 +0000
[...] [...] Watch out for PST rotators in a tilt-over tower, because the water shield over the top seal is only fully effective while the tower is upright. If the tower is routinely tilted over for s
/archives//html/Towertalk/2011-12/msg00410.html (8,090 bytes)

168. Re: [TowerTalk] Which type of cable for a crank-up tower? (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Fri, 2 Dec 2011 19:39:33 +0000
Just askin' :-) -- 73 from Ian GM3SEK http://www.ifwtech.co.uk/g3sek _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@c
/archives//html/Towertalk/2011-12/msg00055.html (9,885 bytes)

169. Re: [TowerTalk] Which type of cable for a crank-up tower? (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Fri, 2 Dec 2011 10:03:28 +0000
I asked that question of the British crankup manufacturers, but they only use stainless steel for locations like harbor walls that are directly exposed to the sea. For all other locations (including
/archives//html/Towertalk/2011-12/msg00014.html (9,242 bytes)

170. Re: [TowerTalk] Which type of cable for a crank-up tower? (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Thu, 1 Dec 2011 22:36:17 +0000
If the tower really is of English origin, you will probably find the answers here: <http://www.qsl.net/gm3woj/latticetower.htm> -- 73 from Ian GM3SEK http://www.ifwtech.co.uk/g3sek __________________
/archives//html/Towertalk/2011-12/msg00010.html (8,301 bytes)

171. Re: [TowerTalk] 10M phased verticals (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Tue, 29 Nov 2011 20:29:59 +0000
W7EL concluded that arrays of base-fed 1/2 or 5/8 wave verticals do not work as expected, because the presence of the other elements distorts the current distribution. The effect is small for 1/4-wav
/archives//html/Towertalk/2011-11/msg00444.html (9,871 bytes)

172. Re: [TowerTalk] STAINLESS STEEL BOLT AND ALUMINIUM ROTATOR CASINGPROBLEM (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Tue, 15 Nov 2011 09:25:21 +0000
One solution is to fix stainless studs into the threaded holes, using a permanent thread-locking compound. The studs pass clear through the holes in the lower part of the rotator shell and can be se
/archives//html/Towertalk/2011-11/msg00264.html (8,785 bytes)

173. Re: [TowerTalk] QSL card in the hole before the concrete pour (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Tue, 1 Nov 2011 19:51:49 +0000
And what's all this stuff about burying St Joseph? Well, I Googled it. Google is *not* my friend any more. -- 73 from Ian GM3SEK http://www.ifwtech.co.uk/g3sek _______________________________________
/archives//html/Towertalk/2011-11/msg00010.html (9,253 bytes)

174. [TowerTalk] Crossover clamps for galvanized ground screens (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Mon, 17 Oct 2011 10:19:45 +0100
As promised in the earlier discussion, the web image for these useful clamps has now been updated: <http://www.rappa.co.uk/products/151-four-way-line-clamp-25-pack> The US supplier is Premier Sheep S
/archives//html/Towertalk/2011-10/msg00291.html (7,291 bytes)

175. Re: [TowerTalk] [DX-CHAT] Antenna Analyzer (score: 104)
Author: "DAVE WHITE" <mausoptik@btinternet.com>
Date: Sun, 16 Oct 2011 20:55:23 +0100
Hi John - try one of these http://www.rigexpert.com/index?s=aa54 an order of magnitude better than the MFJ Dave G0OIL -- Original Message -- From: jcowens1@comcast.net To: WWDXC Cc: DX Chat ; Towerta
/archives//html/Towertalk/2011-10/msg00282.html (8,357 bytes)

176. Re: [TowerTalk] Best Grease for Rotor bearings ? (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Fri, 14 Oct 2011 08:05:02 +0100
It's the same with diecast rotor gears. If the antenna is parked habitually in one direction, moving slightly in the wind, all the metal fatigue is concentrated into one or two teeth. Same here. -- 7
/archives//html/Towertalk/2011-10/msg00228.html (9,500 bytes)

177. Re: [TowerTalk] re; STUF Weather Proofing compound... (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Thu, 6 Oct 2011 22:11:37 +0100
Right here, 3 days ago: fill that 90deg angle with an O-ring molded from a small amount of Coax-Seal, and then screw the PL-259 down onto it. This seals the circular gap where water can creep in, and
/archives//html/Towertalk/2011-10/msg00076.html (9,245 bytes)

178. Re: [TowerTalk] STUF Weather Proofing compound... (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Tue, 4 Oct 2011 08:40:45 +0100
Sometimes you need a little of both. For example, a bulkhead SO239-PL259 connection will always leave a small gap between the flange and the end of the ring. There's no way to stretch tape tightly in
/archives//html/Towertalk/2011-10/msg00028.html (9,827 bytes)

179. Re: [TowerTalk] low band antenna without good ground (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Sat, 1 Oct 2011 13:38:21 +0100
Bob, I'm trying to reply to your direct e-mail but messages are coming back "undeliverable". I will try again when condx improve :-) -- 73 from Ian GM3SEK http://www.ifwtech.co.uk/g3sek ____________
/archives//html/Towertalk/2011-10/msg00002.html (8,097 bytes)

180. Re: [TowerTalk] low band antenna without good ground (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Fri, 30 Sep 2011 08:29:27 +0100
One way is to clamp the end of the roll between a pair of galvanized steel busbars, and then connect to the middle of those bars using SS hardware. Lengths of galvanized steel bar, ready drilled with
/archives//html/Towertalk/2011-09/msg00421.html (10,479 bytes)


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