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References: [ +from:G3SEK@ifwtech.demon.co.uk: 91 ]

Total 91 documents matching your query.

61. [TowerTalk] Gain Figures in QST (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Fri, 30 Jan 1998 21:03:15 +0000; Now that would be a good idea - "put up or shut up"! Are there any manufacturers that already make models available to all comers? 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book' 'In Practice' column; /archives//html/Towertalk/1998-01/msg00502.html (8,087 bytes)
62. [TowerTalk] Cinch Jones connector sources (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Fri, 30 Jan 1998 21:01:26 +0000; C-J connectors seem to offer a unique combination of high voltage (730V AC rms), high current (10A per pole) and low cost. Since Farnell Components took over Newark, the same connectors are now avail; /archives//html/Towertalk/1998-01/msg00503.html (7,999 bytes)
63. [TowerTalk] Re:Spammers, Telemarketers, et al (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Sat, 20 Dec 1997 08:49:46 +0000; The biggest bandwidth-waster is the habit of re-quoting all the previous messages in the thread - and that is entirely OUR fault! 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book' 'In Practice' columni; /archives//html/Towertalk/1997-12/msg00484.html (7,701 bytes)
64. [TowerTalk] Connector insertion loss (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Tue, 2 Sep 1997 07:24:40 +0100; Surely it depends on the installation? If the coax has a loose inner conductor but contains some bends, most of the expansion/contraction forces will be taken up by flexing at the bends, the cable ac; /archives//html/Towertalk/1997-09/msg00026.html (9,572 bytes)
65. [TowerTalk] N Connector pin (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Wed, 3 Sep 1997 07:50:02 +0100; The 259/239 is much stronger than the tiny ridge of brass/PTFE on the N - but probably not strong enough to resist the full force of a long length of expanding hardline. Returning to the captive-pin; /archives//html/Towertalk/1997-09/msg00066.html (8,906 bytes)
66. [TowerTalk] AB-105/FRC (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Mon, 15 Sep 1997 16:07:29 +0100; It's a great way to *start* lowering... but what happens when the tower is almost down? The lower it comes, the less lifting force the lines can provide, until... As a test, try lowering a 20ft pole; /archives//html/Towertalk/1997-09/msg00398.html (8,291 bytes)
67. [TowerTalk] Moisture displacement (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Tue, 16 Sep 1997 20:17:48 +0100; I have a similar system on the EME antenna, except that the weight is taken in two PTFE-lined flanges above ground, so the underground bearing only deals with sideways forces so there is very little; /archives//html/Towertalk/1997-09/msg00437.html (8,792 bytes)
68. [TowerTalk] Re: Waterproofing Connections (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Tue, 16 Sep 1997 20:05:25 +0100; You can get most of the same effect with ordinary heat-shrink tubing by running some hot-melt glue round the cable and the connector before you slide the tubing over. A quick zap with the heat gun se; /archives//html/Towertalk/1997-09/msg00441.html (8,635 bytes)
69. [TowerTalk] KC1XX's 8 10M yagis (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Fri, 19 Sep 1997 07:32:05 +0100; We can certainly talk 144 or 432, where contesters use 8-high stacks to increase the gain without narrowing the beamwidth. For the simplest system, feeding all antennas through equal line lengths, th; /archives//html/Towertalk/1997-09/msg00557.html (9,467 bytes)
70. [TowerTalk] Stacking Supplement (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Sat, 30 Aug 1997 22:14:51 +0100; The best gain that generations of 2-meter yagi designers have been able to achieve with that electrical boom length (4.1 wavelengths) is about 15.5dBd (17.65dBi) in free space. Throw in a few more dB; /archives//html/Towertalk/1997-08/msg00835.html (7,888 bytes)
71. [TowerTalk] Connector insertion loss (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Sun, 31 Aug 1997 08:20:24 +0100; NA1L made some similar measurements on straight 239/259 junctions, confirming that there's absolutely no practical problem up to way beyond 30MHz. Any sign of a VSWR problem indicates that the connec; /archives//html/Towertalk/1997-08/msg00838.html (10,342 bytes)
72. [TowerTalk] Re: coax splices (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Sun, 31 Aug 1997 09:01:35 +0100; I'd agree with that. I had to scrap an all-coax feed system for the 8-yagi 432MHz EME array because of water leaks in the damp British climate. There was a total of 13 N connectors... but which one h; /archives//html/Towertalk/1997-08/msg00839.html (10,455 bytes)
73. [TowerTalk] beam headings (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Wed, 9 Jul 1997 07:14:38 +0100; This is the best way of all. There are plenty of sun position programs around on the Net - search for "VK3UM" (freeware) or for "W5UN". Pick a time when the sun isn't too high, put on your cool shade; /archives//html/Towertalk/1997-07/msg00328.html (7,965 bytes)
74. [TowerTalk] Carab... Karab... Carrib... (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Sun, 13 Jul 1997 18:45:57 +0100; Just for interest, here's what the German dictionary says... A "karabiner" was originally the German word for a snap-hook, as used for attaching a sling to a carbine. British climbers usually call th; /archives//html/Towertalk/1997-07/msg00468.html (7,438 bytes)
75. [TowerTalk] Rotators (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Tue, 3 Jun 1997 22:58:52 +0100; I'd heard that modern prop pitch actuators are mostly hydraulic, so the supply of electric motors may be limited. Little cousin from the WW2 era was the cowl gill motor, which is a similar cylindrica; /archives//html/Towertalk/1997-06/msg00122.html (9,568 bytes)
76. [TowerTalk] ferrite beads on guys (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Sat, 14 Jun 1997 08:00:05 +0100; You can get a pretty good idea of the impedance of a bead by measuring it with an MFJ-259 or Autek RF-1. Just slip the bead onto a wire and read the "resistance" meter. Actually both the 259 and the; /archives//html/Towertalk/1997-06/msg00427.html (9,427 bytes)
77. [TowerTalk] tower damage / insurance question (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Fri, 2 May 1997 08:31:12 +0100; .... I e-mailed Paul in very similar terms. Prorating probably wouldn't be legal under English (and Welsh) law about third-party insurance claims. The principle is that the perpetrator's insurance co; /archives//html/Towertalk/1997-05/msg00036.html (9,402 bytes)
78. [TowerTalk] Autek RF-1 (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Fri, 16 May 1997 08:18:06 +0100; According to QST for September 1996, the recent version of the Autek instruction manual gives a formula on Page 10 for determining R +/- jX, which isn't in my older manual. Please could somebody let; /archives//html/Towertalk/1997-05/msg00396.html (7,433 bytes)
79. [TowerTalk] Autek RF-1 (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Fri, 16 May 1997 15:59:46 +0100; Thanks to everybody who responded so helpfully and so quickly! A number of people have asked for the same information, so here it is. First from Tom, N1MM... _________________________________________; /archives//html/Towertalk/1997-05/msg00409.html (9,848 bytes)
80. [TowerTalk] Re: [DX] New HF beam product announcement (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Sun, 18 May 1997 09:19:04 +0100; That's Dr James Breakall, one of the 'fathers' of NEC and MININEC. In other words, these people are worth listening to. 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book' 'In Practice' columnist for Rad; /archives//html/Towertalk/1997-05/msg00439.html (8,084 bytes)

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