Search String: Display: Description: Sort:

Results:

References: [ +from:texasrf@aol.com: 435 ]

Total 435 documents matching your query.

221. Re: [TowerTalk] US Tower Dayton AC Motor issue (score: 1)
Author: TexasRF@aol.com
Date: Sat, 13 Sep 2008 19:04:54 EDT
Scott, you have described a classic case of an open start winding circuit. The most common cause in this part of the country is mud wasps building a nest around the start circuit throwout switch, cau
/archives//html/Towertalk/2008-09/msg00239.html (10,557 bytes)

222. Re: [TowerTalk] Texas Towers (score: 1)
Author: TexasRF@aol.com
Date: Fri, 31 Oct 2008 12:33:36 EDT
Drax, I looked into your backorder with TexasTowers. We have had the parts on order with Rohn since early August and still waiting for delivery. As of yesterday they are promising to ship midweek nex
/archives//html/Towertalk/2008-10/msg00684.html (8,219 bytes)

223. Re: [TowerTalk] wire antenna question (score: 1)
Author: TexasRF@aol.com
Date: Thu, 13 Nov 2008 12:33:45 EST
Blair, that is not quite right. Using a 50 ohm swr indicator, the lowest swr is shown when the reactance is zero. Using a transmission line program, 40 ohm load 40+j0; swr=1.25. 40+j10=1.37; 40-j10=1
/archives//html/Towertalk/2008-11/msg00341.html (12,953 bytes)

224. Re: [TowerTalk] wire antenna question (score: 1)
Author: TexasRF@aol.com
Date: Fri, 14 Nov 2008 10:39:05 EST
Steve, when I plug your numbers into a transmission line program I get these results:283.8 -j23.66 = 5.72 vswr (same as your example). 288.2 +j0 = 5.7 vswr which is just slightly lower than example #
/archives//html/Towertalk/2008-11/msg00356.html (9,725 bytes)

225. Re: [TowerTalk] Inverted L Tuning - Solved (score: 1)
Author: TexasRF@aol.com
Date: Fri, 5 Dec 2008 07:49:17 EST
There is a scenario that you are both correct: If the large vertical has quite high ground resistance in the beginning, the base impedance can actually be greater than 50 ohms. As radials are added,
/archives//html/Towertalk/2008-12/msg00083.html (10,820 bytes)

226. Re: [TowerTalk] Source for Phillystran (score: 1)
Author: TexasRF@aol.com
Date: Fri, 5 Dec 2008 17:06:00 EST
Yes, in stock at Texas Towers. Call 1 800 272 3467. 73, Gerald Williamson, K5GW General Manager, Texas Towers In a message dated 12/5/2008 3:43:31 P.M. Central Standard Time, aa3b.bud@gmail.com write
/archives//html/Towertalk/2008-12/msg00106.html (7,970 bytes)

227. Re: [TowerTalk] Best way of getting a line over a tree (score: 1)
Author: TexasRF@aol.com
Date: Wed, 24 Dec 2008 12:40:14 EST
What is a BFR? 73/k5gw In a message dated 12/24/2008 11:24:23 A.M. Central Standard Time, jruing@ameritech.net writes: I duck tape a light Dacron rope to a BFR and just throw it like a base ball. ==
/archives//html/Towertalk/2008-12/msg00591.html (9,615 bytes)

228. Re: [TowerTalk] Yagi Impedance (score: 1)
Author: TexasRF@aol.com
Date: Thu, 1 Jan 2009 13:16:59 EST
John, I have built a number of antennas from 7MHz to 432MHz using YO and find the same impedance shift you mention. Apparently the algorithms don't accurately deal with this issue even though pattern
/archives//html/Towertalk/2009-01/msg00013.html (9,873 bytes)

229. Re: [TowerTalk] stacking distances (score: 1)
Author: TexasRF@aol.com
Date: Fri, 2 Jan 2009 16:51:22 EST
In general, as the stacking distance exceeds optimum, the mail lobe beamwidth continues to deacrease. The gain does not increase as one might expect because the grating lobe amplitude increases and "
/archives//html/Towertalk/2009-01/msg00038.html (8,568 bytes)

230. Re: [TowerTalk] Crimper for Belden 9913 - Response DAVIS RF Co. (score: 1)
Author: TexasRF@aol.com
Date: Sun, 4 Jan 2009 09:34:13 EST
Perhaps the .128" size is defined by the o.d. of the center pin which naturally is larger than the center conductor? 73, Gerald K5GW In a message dated 1/4/2009 12:26:53 A.M. Central Standard Time, s
/archives//html/Towertalk/2009-01/msg00076.html (10,767 bytes)

231. Re: [TowerTalk] A poll of Cubical Quad qwners (score: 1)
Author: TexasRF@aol.com
Date: Sat, 17 Jan 2009 17:53:00 EST
Have you considered using a few snap on ferrite cores on the end of the matching sections where they connect to the driven element? 73, Gerald K5GW In a message dated 1/17/2009 2:34:37 P.M. Central S
/archives//html/Towertalk/2009-01/msg00280.html (9,886 bytes)

232. Re: [TowerTalk] ohn 45G - Swaged or welded sleeves on legs ?? (score: 1)
Author: TexasRF@aol.com
Date: Thu, 26 Feb 2009 16:31:25 EST
Having sold thousands of 45G sections over the past 30+ years, I can state positively that 45G uses a joining sleeve on the lower end of the section. There is NO swaged joint on Rohn 45G tower sectio
/archives//html/Towertalk/2009-02/msg00609.html (12,081 bytes)

233. Re: [TowerTalk] Tower Hardware (score: 1)
Author: TexasRF@aol.com
Date: Mon, 9 Mar 2009 10:49:55 EDT
The thimble installation goes much easier if you twist the legs away from each other, one left, the other right instead of prying them open. A couple of vise grip pliers makes this quick and easy and
/archives//html/Towertalk/2009-03/msg00201.html (8,740 bytes)

234. Re: [TowerTalk] Ring Rotator and Tribander? Advise sought (score: 1)
Author: TexasRF@aol.com
Date: Mon, 16 Mar 2009 18:21:17 EDT
If you scale this scenario to 2 meters, it is similar to using a 1.8 inch o.d. mast to support and rotate a beam antenna. This is done all the time with no apparent problem. 73, Gerald K5GW In a mess
/archives//html/Towertalk/2009-03/msg00429.html (9,361 bytes)

235. Re: [TowerTalk] 6061 vs 6063 (score: 1)
Author: TexasRF@aol.com
Date: Tue, 24 Mar 2009 17:55:45 EDT
Most antenna manufacturers are using 6063-T832 alloy tubing. The T832 is very important and I have seen no one refer to this in these tubing discussions. The yield strength of 6061-T6 and 6063-T832 i
/archives//html/Towertalk/2009-03/msg00708.html (13,240 bytes)

236. Re: [TowerTalk] 6M Beam being weird (score: 1)
Author: TexasRF@aol.com
Date: Sun, 26 Apr 2009 12:42:10 EDT
Scott, 10:1 vswr indicates a GROSS mismatch. This can happen when there is a short circuit or open circuit between the coax and gamma match. Ian had a good suggestion about the N connector. If you co
/archives//html/Towertalk/2009-04/msg00735.html (7,762 bytes)

237. Re: [TowerTalk] MOVs in Stackmatch (score: 1)
Author: TexasRF@aol.com
Date: Wed, 3 Jun 2009 21:05:16 EDT
I was under the impression that MOV devices are "damaged" somewhat during each protection event and eventually enough "damage" accumulates and they have to be replaced. Maybe someone with more knowle
/archives//html/Towertalk/2009-06/msg00102.html (9,786 bytes)

238. Re: [TowerTalk] Guyed wire angles (score: 1)
Author: TexasRF@aol.com
Date: Mon, 13 Jul 2009 17:28:36 EDT
Rocky, the major effect is the guy system uses up more real estate than normal guying schemes. The forces on the guy wires will be somewhat less and that could be a good thing. Gerald Williamson, Gen
/archives//html/Towertalk/2009-07/msg00217.html (8,649 bytes)

239. Re: [TowerTalk] Need European spec for Chrome moly tube (score: 1)
Author: TexasRF@aol.com
Date: Tue, 14 Jul 2009 18:33:53 EDT
John, try a google search for 4130 chromoly specification. Several hits will come up. Beware that the material is usually sold without the final heat treatment and to reach the yield strength you are
/archives//html/Towertalk/2009-07/msg00245.html (9,636 bytes)

240. Re: [TowerTalk] Cable Runs (score: 1)
Author: TexasRF@aol.com
Date: Mon, 27 Jul 2009 18:49:59 EDT
Gene's email is chock full of good ideas and advice. The serpentine step is a stroke of genius! A corrugated drain pipe can also be used if an additional step is added: where the pull cables and wire
/archives//html/Towertalk/2009-07/msg00546.html (11,417 bytes)


This search system is powered by Namazu