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Total 277 documents matching your query.

201. [TowerTalk] CATV length (score: 1)
Author: k6ll@juno.com (David O Hachadorian)
Date: Fri, 04 Jul 1997 13:55:52 EDT
On Fri, 4 Jul 1997 10:03:48 -0500 ROBERT SAUVAN <cabmas@bankpds.com> writes: The first thing I would do is MEASURE the velocity factor of the cable. Short one end, then use a grid dip meter or antenn
/archives//html/Towertalk/1997-07/msg00169.html (10,854 bytes)

202. [TowerTalk] Antenna Gain Figures (score: 1)
Author: k6ll@juno.com (David O Hachadorian)
Date: Sat, 05 Jul 1997 16:34:55 EDT
Although Hy-Gain and KLM both use dBd, neither one goes into an explanation of whether the dipoles and beams are in free space or over earth. If over earth, the antenna heights and elevation angles a
/archives//html/Towertalk/1997-07/msg00193.html (9,669 bytes)

203. [TowerTalk] 75 ohm coax matching (score: 1)
Author: k6ll@juno.com (David O Hachadorian)
Date: Mon, 07 Jul 1997 10:57:23 EDT
This approach was just detailed in the June, 1997 issue of QST, page 43. It's pretty neat, at least for a single band. Dave Hachadorian, K6LL k6ll@juno.com -- FAQ on WWW: http://www.contesting.com/to
/archives//html/Towertalk/1997-07/msg00250.html (8,387 bytes)

204. [TowerTalk] Fwd: Tower Guys (score: 1)
Author: k6ll@juno.com (David O Hachadorian)
Date: Thu, 10 Jul 1997 13:23:08 EDT
To: <towertalk@contesting.com> One data point for four-way guying is Rohn's recommended layout for their #45 foldover tower. The 64' model has two sets of four guys, anchored 25' from the tower base.
/archives//html/Towertalk/1997-07/msg00377.html (8,312 bytes)

205. [TowerTalk] 40M interference (score: 1)
Author: k6ll@juno.com (David O Hachadorian)
Date: Tue, 15 Jul 1997 10:24:03 EDT
Never use one of these Radio Shack power supplies for any piece of valuable equipment. A local ham fried a dual band HT when the regulator failed. There is no overvoltage protection in the event of r
/archives//html/Towertalk/1997-07/msg00525.html (7,820 bytes)

206. [TowerTalk] distance to guy wires (score: 1)
Author: k6ll@juno.com (David O. Hachadorian)
Date: Sat, 19 Jul 1997 02:01:55 EDT
On Fri, 18 Jul 1997 22:23:40 -0600 Mike Fatchett <w0mu@sprynet.com> writes: tr = g(h-a) -- h where: tr = allowable turning radius g = distance from the tower base to the anchor of the guy wire you ar
/archives//html/Towertalk/1997-07/msg00617.html (7,842 bytes)

207. [TowerTalk] Force12 EF330 More (score: 1)
Author: k6ll@juno.com (David O. Hachadorian)
Date: Sat, 26 Jul 1997 14:26:40 EDT
On Sat, 26 Jul 1997 06:00:43 -0600 Charlie Summers <csummers@diac.com> writes: Another nasty characteristic of the Autek unit is that when the battery voltage gets low, it starts producing bad data!
/archives//html/Towertalk/1997-07/msg00745.html (8,455 bytes)

208. [TowerTalk] KT34XA (score: 1)
Author: k6ll@juno.com (David O. Hachadorian)
Date: Sun, 27 Jul 1997 00:00:33 EDT
Step 1. Try another swr meter. This is especially true if you're using one of the low power "antenna analyzers." Try a conventional swr bridge/transmitter. Bypass all accessories, such as amplifiers,
/archives//html/Towertalk/1997-07/msg00754.html (8,670 bytes)

209. [TowerTalk] Rohn's engineering calculations (score: 1)
Author: k6ll@juno.com (David O Hachadorian)
Date: Sun, 01 Jun 1997 22:29:21 EDT
Does anyone have a set of engineering calculations done by Rohn for a particular guyed tower installation? I would really like to see how they calculated the allowable antenna load at a particular wi
/archives//html/Towertalk/1997-06/msg00030.html (7,153 bytes)

210. [TowerTalk] Triex THD-588 (score: 1)
Author: k6ll@juno.com (David O Hachadorian)
Date: Fri, 06 Jun 1997 12:34:06 EDT
Anybody have specs on this 88' crankup? Freestanding or guyed? Load capability vs wind? There's one at an estate sale here in town for $500. Dave Hachadorian, K6LL k6ll@juno.com Yuma, AZ -- FAQ on WW
/archives//html/Towertalk/1997-06/msg00232.html (6,856 bytes)

211. [TowerTalk] Effects of less than 80% guying (long) (score: 1)
Author: k6ll@juno.com (David O Hachadorian)
Date: Fri, 20 Jun 1997 14:06:09 EDT
On Fri, 20 Jun 1997 01:25:53 +0000 "Sean McCarthy" <wx8l@akorn.net> writes: Here's a little comparison of 80 vs 100' on 40 thru 10. It shows that you gain about 1.9 dB at the lowest angles by adding
/archives//html/Towertalk/1997-06/msg00669.html (13,368 bytes)

212. [TowerTalk] summary CATV (score: 1)
Author: k6ll@juno.com (David O Hachadorian)
Date: Wed, 25 Jun 1997 00:04:43 EDT
On Tue, 24 Jun 1997 20:00:24 -0500 ROBERT SAUVAN <cabmas@bankpds.com> writes: 4/4, 8/4, 12/4, 16/4, 20/4, 24/4, 28/4... on 14.1 These lengths are an even number of quarter waves on 10, 15, and 20. e.
/archives//html/Towertalk/1997-06/msg00844.html (7,285 bytes)

213. [TowerTalk] How Important is F/B? (score: 1)
Author: k6ll@juno.com (David O Hachadorian)
Date: Thu, 26 Jun 1997 13:31:18 EDT
I think that is a fair statement. It's nice to attract Carribbean and South American stations while running JA's. Even if you live in New England, and are running Europe, the poor f/b will keep the W
/archives//html/Towertalk/1997-06/msg00908.html (8,592 bytes)

214. [TowerTalk] TH7 versus KT34XA (score: 1)
Author: k6ll@juno.com (David O Hachadorian)
Date: Thu, 26 Jun 1997 13:31:18 EDT
On Thu, 26 Jun 1997 09:19:02 -0700 "Bob Wruble" <ai7b@teleport.com> writes: That's interesting. Dan's very successful setup was described to me by Danny, K7SS, and was the inspiration for my KT-34XA/
/archives//html/Towertalk/1997-06/msg00909.html (8,414 bytes)

215. [TowerTalk] Finding roof beams, determining impedance ofcoax cable. (score: 1)
Author: k6ll@juno.com (David O Hachadorian)
Date: Thu, 26 Jun 1997 13:31:18 EDT
On Thu, 26 Jun 1997 10:09:07 -0500 "Flanders, Jim" <jaf00@aag.com> writes: Actually, it should be almost any length of cable EXCEPT a half wave. A half wave will present the 50 ohm termination, regar
/archives//html/Towertalk/1997-06/msg00910.html (9,256 bytes)

216. [TowerTalk] Beam Recommendation Wanted (score: 1)
Author: k6ll@juno.com (David O Hachadorian)
Date: Fri, 27 Jun 1997 00:01:24 EDT
On Thu, 26 Jun 1997 19:50:08 -0700 Larry McDavid <lmcdavid@lmceng.com> writes: Hi Larry, I have the KLM KT-34XA, a big antenna. I do pretty well in a lot of contests. My local buddy has the KT-34A, 1
/archives//html/Towertalk/1997-06/msg00923.html (8,589 bytes)

217. [TowerTalk] KLM KT-34A (score: 1)
Author: k6ll@juno.com (David O Hachadorian)
Date: Sun, 04 May 1997 11:00:33 EDT
On Sat, 3 May 1997 22:14:25 -0500 "Allan Allmand - N5CA" <n5ca@flash.net> writes: I would guess that it's either a high resistance connection, or an assembly error. With an swr this bad, it almost ha
/archives//html/Towertalk/1997-05/msg00107.html (8,365 bytes)

218. [TowerTalk] KLM-34XA insulator problems ? (score: 1)
Author: k6ll@juno.com (David O Hachadorian)
Date: Sun, 04 May 1997 12:12:06 EDT
I have a KT-34XA in Yuma, Arizona, the UV capital of the world. Early versions of the XA did have plastic caps that deteriorated in 2-3 years due to UV. KLM solved that problem at least five years ag
/archives//html/Towertalk/1997-05/msg00109.html (8,835 bytes)

219. [TowerTalk] Low beam vs. higher dipoles? (score: 1)
Author: k6ll@juno.com (David O Hachadorian)
Date: Fri, 09 May 1997 14:38:52 EDT
On Thu, 8 May 1997 21:41:15 -0500 "Jeff Shelton" <cshelton@pop.erols.com> writes: Here is a little comparison of dipoles at 50' in their favored direction vs. a 5 dBd gain tribander at 25'. Tribander
/archives//html/Towertalk/1997-05/msg00278.html (11,688 bytes)

220. [TowerTalk] 500 new HDTV towers (score: 1)
Author: k6ll@juno.com (David O Hachadorian)
Date: Sun, 11 May 1997 12:11:14 EDT
There's an interesting article in today's paper about how the broadcast TV industry will be building 500 big towers over the next five years to phase in HDTV channels on the new assigned frequencies.
/archives//html/Towertalk/1997-05/msg00311.html (7,505 bytes)

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