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Total 1919 documents matching your query.

321. Re: [TowerTalk] Six Meter Antenna Feedline/Choke (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Thu, 19 Oct 2006 23:05:58 +0100
Just wondering what you mean by "Gee... it's 6 meters"? Radiation from the coax when transmitting is only a small part of the story on this band. On receive, 6 meters is a lot quieter than most peopl
/archives//html/Towertalk/2006-10/msg00540.html (9,014 bytes)

322. Re: [TowerTalk] N or UHF? (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Tue, 17 Oct 2006 08:13:00 +0100
They can have, it the end force is large enough. Yes, 7mm center conductor ID and 16mm shield ID. Those two dimensions give almost exactly 50 ohms. In short - more ruggedness than UHF, more performan
/archives//html/Towertalk/2006-10/msg00453.html (10,728 bytes)

323. Re: [TowerTalk] N or UHF? (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Mon, 16 Oct 2006 22:49:38 +0100
UHF plugs are more tolerant of end forces because the center pin is much larger and more firmly anchored. The main problem with N connectors is that the original MIL-standard design has a floating ce
/archives//html/Towertalk/2006-10/msg00440.html (9,561 bytes)

324. Re: [TowerTalk] Balun on a vertical (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Wed, 11 Oct 2006 15:51:22 +0100
Mine certainly has - tied to an 8ft post, on a hilltop only two miles from the Irish Sea. The top quite frequently bends below horizontal in the gales, but it comes back again. Since the constant swa
/archives//html/Towertalk/2006-10/msg00326.html (10,498 bytes)

325. Re: [TowerTalk] Stacking V-UHF antennas. (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Wed, 11 Oct 2006 07:15:11 +0100
If you stack two horizontally polarized yagis one above the other, the E-plane (horizontal) beamwidth stays the same. The H-plane (vertical) beamwidth is reduced, but not exactly halved. For more det
/archives//html/Towertalk/2006-10/msg00318.html (8,118 bytes)

326. Re: [TowerTalk] Balun on a vertical (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Mon, 9 Oct 2006 15:06:24 +0100
You're right to say that a vertical antenna is unbalanced. All verticals are unbalanced by definition - they cannot ever by symmetrical with respect to their environment because one end of the antenn
/archives//html/Towertalk/2006-10/msg00253.html (8,881 bytes)

327. Re: [TowerTalk] 9913 coax (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Wed, 20 Sep 2006 22:56:20 +0100
Like K6BR, I've been around the block with airspaced cables like 9913 in a wet climate, with 1500W at 432MHz to punish any mistakes. If the end of an airspaced cable like 9913 is not completely seale
/archives//html/Towertalk/2006-09/msg00752.html (9,631 bytes)

328. Re: [TowerTalk] SDS Hammer Drills - Difference? (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Thu, 31 Aug 2006 09:48:41 +0100
Right... sorry this has turned out so long, but I didn't have the time to make it shorter :-) Every home handyman probably has a compact electric drill with a keyed chuck, and an optional "hammer" ac
/archives//html/Towertalk/2006-08/msg01171.html (12,179 bytes)

329. Re: [TowerTalk] SDS Hammer Drill Sale (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Wed, 30 Aug 2006 21:09:09 +0100
That particular model (or something very like it) has been around in Europe for some time, but those large SDS drills may not be the bargain they seem. At 10 pounds they are too heavy for anything bu
/archives//html/Towertalk/2006-08/msg01115.html (9,450 bytes)

330. Re: [TowerTalk] Sinking ground rods (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Wed, 30 Aug 2006 07:29:41 +0100
Even betterer, track down an SDS to square-drive adapter, and have a choice of socket sizes. Sorry to hear that SDS tools are still hard to find in the USA. The SDS hammer drill system is truly wonde
/archives//html/Towertalk/2006-08/msg01095.html (8,541 bytes)

331. Re: [TowerTalk] Ground Radial Attachment Bus ? (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Mon, 21 Aug 2006 09:39:37 +0100
I am doing something very similar. The method comes from having much more time to think about the job (while traveling) than time to actually do it. It also rains a lot here, so it's important to do
/archives//html/Towertalk/2006-08/msg00670.html (9,707 bytes)

332. Re: [TowerTalk] need a FULTON K2550 WINCH (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Wed, 9 Aug 2006 08:28:55 +0100
Many of us have a w*nch that reels up the bed-sheets... full auto-brake too. -- 73 from Ian GM3SEK _______________________________________________ _______________________________________________ Towe
/archives//html/Towertalk/2006-08/msg00229.html (7,698 bytes)

333. Re: [TowerTalk] concrete forms (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Mon, 31 Jul 2006 23:00:53 +0100
That's absolutely right. However, it's not just a matter of energy - you need enough capacity to shift a whole truckload of concrete up the hill very quickly. Otherwise you're into rapidly escalating
/archives//html/Towertalk/2006-07/msg00939.html (10,013 bytes)

334. [TowerTalk] UK: frame for BP60 mounting bolts available (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Wed, 19 Jul 2006 22:17:52 +0100
For installing the BP60 Versatower, I had a strong steel frame made to hold the four M24 bolts in exactly the correct positions while the concrete was being poured. It worked perfectly - the base pla
/archives//html/Towertalk/2006-07/msg00641.html (7,401 bytes)

335. Re: [TowerTalk] New Tower Installation (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Wed, 19 Jul 2006 08:53:57 +0100
Agreed. To add some detail: braid has a larger total surface area than solid if you count all the individual strands - but that is not relevant at RF (including the high-frequency energy component of
/archives//html/Towertalk/2006-07/msg00632.html (9,953 bytes)

336. Re: [TowerTalk] porcupines (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Wed, 5 Jul 2006 18:23:53 +0100
Hold on there - you did TWO things! Now which one of those two things solved your problem... or was it both... and how can you tell? That's the problem with "it worked for me" reports. We always conc
/archives//html/Towertalk/2006-07/msg00126.html (8,403 bytes)

337. Re: [TowerTalk] OT??? High power 2.4 GHz rules change (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Wed, 17 May 2006 17:43:08 +0100
TowerTalk may not be the best place to ask these questions. The high power 2.3/2.4GHz users hang out on MOON-NET http://www.nlsa.com/nets/moon-net-help.html and also possibly on AMPS http://lists.con
/archives//html/Towertalk/2006-05/msg00305.html (9,003 bytes)

338. Re: [TowerTalk] Antenna Spacing (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Mon, 8 May 2006 16:07:56 +0100
Follow the link from my home page (below) to "Stacking". -- 73 from Ian GM3SEK 'In Practice' columnist for RadCom (RSGB) http://www.ifwtech.co.uk/g3sek _______________________________________________
/archives//html/Towertalk/2006-05/msg00127.html (7,995 bytes)

339. Re: [TowerTalk] Off-Topic: RFI question (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Thu, 4 May 2006 08:37:30 +0100
[RFI] has the best "sleep mode" of any forum I know. When there is nothing to discuss, it can go for weeks with no traffic, and that's how members seem to like it. But when a topic does pop up, almos
/archives//html/Towertalk/2006-05/msg00087.html (8,644 bytes)

340. Re: [TowerTalk] Vertical Pattern of a yagi (score: 104)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Tue, 25 Apr 2006 08:53:19 +0100
The most important factors in shaping your vertical pattern are the antenna height, stacking (if you use it), and YOUR terrain profile. Unless you live on flat terrain, you will need HFTA. Compared w
/archives//html/Towertalk/2006-04/msg00429.html (10,094 bytes)


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