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Total 529 documents matching your query.

341. [Towertalk] Re: Fence update (score: 123)
Author: k2av@contesting.com (Guy Olinger, K2AV)
Date: Sun, 18 Aug 2002 17:12:20 -0400
He already replaced the close metal fence sections with wood, and broke up nearby metal sections with wood sections. Unbalance problem at the antennas went away. All antennas tune up equal now. He ha
/archives//html/Towertalk/2002-08/msg00534.html (9,323 bytes)

342. [Towertalk] Force12 C4-SXL (score: 123)
Author: k2av@contesting.com (Guy Olinger, K2AV)
Date: Sun, 18 Aug 2002 17:25:09 -0400
You will find that the tuning of a 40 meter dipole varies nearly as wildly with such changes in height, it's not a Force 12 thing at all. Further if the dipole is shortened by any of the various mean
/archives//html/Towertalk/2002-08/msg00536.html (11,849 bytes)

343. [Towertalk] Antennas vs. Antennae (score: 123)
Author: k2av@contesting.com (Guy Olinger, K2AV)
Date: Sat, 24 Aug 2002 12:55:28 -0400
While this thread on linguistics has mostly disappeared locally by way of my delete key, it somehow has managed to persevere on a listserve dedicated to towers and antennas. Perhaps those who seem so
/archives//html/Towertalk/2002-08/msg00676.html (13,979 bytes)

344. [Towertalk] Inverted L (score: 123)
Author: k2av@contesting.com (Guy Olinger, K2AV)
Date: Thu, 29 Aug 2002 21:38:22 -0400
Pattern, feed, etc all depend on the overall length of the inverted L compared to the wavelength of the frequency in use. For instance, an inverted L 65 feet up and 65 feet out can be used: a) on 160
/archives//html/Towertalk/2002-08/msg00779.html (10,299 bytes)

345. [Towertalk] Shunt-Fed Tower EZNEC Simulation (score: 123)
Author: k2av@contesting.com (Guy Olinger, K2AV)
Date: Sat, 6 Jul 2002 15:01:57 -0400
The tower resonance is the tower resonance, period. Nothing changes that. That is a frequency at which RF current flows most easily in the tower/antenna combo. Everything else is forcing energy into
/archives//html/Towertalk/2002-07/msg00135.html (9,437 bytes)

346. [Towertalk] Tower shunt feed for 160 M and modified force12 antennas (score: 123)
Author: k2av@contesting.com (Guy Olinger, K2AV)
Date: Sat, 6 Jul 2002 23:01:18 -0400
On something like a C31XR, just outright grounding of the 20m reflector and director will keep the others from breaking down. The arcing occurs because the gap between the boom and element is the "en
/archives//html/Towertalk/2002-07/msg00149.html (10,363 bytes)

347. [Towertalk] F12 C4S (score: 123)
Author: k2av@contesting.com (Guy Olinger, K2AV)
Date: Sun, 7 Jul 2002 21:34:39 -0400
If you care about 40 meters, the C4S will walk all over the vertical. 52 is a wee bit low, but it is still high enough to outperform any single vertical. BTW, the F12 linear loaded stuff is very sens
/archives//html/Towertalk/2002-07/msg00179.html (8,666 bytes)

348. [Towertalk] F12 C4S (score: 123)
Author: k2av@contesting.com (Guy Olinger, K2AV)
Date: Mon, 8 Jul 2002 10:36:58 -0400
In urban areas, I've always found quite higher reception of man-made noise on verticals, for what ever reason. And unless the vertical is over an extended flat copper roof (block of same height row h
/archives//html/Towertalk/2002-07/msg00189.html (11,308 bytes)

349. [Towertalk] 4-square vs 40-2CD (score: 123)
Author: k2av@contesting.com (Guy Olinger, K2AV)
Date: Mon, 8 Jul 2002 20:20:35 -0400
Much betterer... vertical. http://www.mscomputer.com take an additional 5 percent off
/archives//html/Towertalk/2002-07/msg00217.html (8,980 bytes)

350. [Towertalk] Inv L (score: 123)
Author: k2av@contesting.com (Guy Olinger, K2AV)
Date: Tue, 9 Jul 2002 22:26:00 -0400
Then there is this business of just HOW you DEFINE an Inv El. Take an antenna that is fed at the ground, against adequate ground, up 67' and out 67' or thereabouts. Well, that is a 1/4 wave of wire o
/archives//html/Towertalk/2002-07/msg00255.html (13,072 bytes)

351. [Towertalk] Coupling phyllistran to ehs (score: 123)
Author: k2av@contesting.com (Guy Olinger, K2AV)
Date: Sun, 28 Jul 2002 17:51:17 -0400
Loop the big grip on the lower end of the philly through the big grip on the upper end of the ehs. Nothing else needed. insulator, http://www.mscomputer.com take an additional 5 percent off
/archives//html/Towertalk/2002-07/msg00755.html (9,245 bytes)

352. [Towertalk] Tribander identification (score: 123)
Author: k2av@contesting.com (Guy Olinger, K2AV)
Date: Sun, 2 Jun 2002 16:25:52 -0400
Not mine, at least not by the time I owned it. early TH wire loops
/archives//html/Towertalk/2002-06/msg00017.html (9,009 bytes)

353. [Towertalk] NVIS antenna--reflector addition (score: 123)
Author: k2av@contesting.com (Guy Olinger, K2AV)
Date: Wed, 5 Jun 2002 22:36:42 -0400
The ground is a reflector, but it is a lossy reflector. Best 75 degree numbers I can get for a dipole using earth as reflector are around 6 or 7 dbi. I'm not sure what figures you were using for an N
/archives//html/Towertalk/2002-06/msg00072.html (9,529 bytes)

354. [Towertalk] KT34XA QUESTION (score: 123)
Author: k2av@contesting.com (Guy Olinger, K2AV)
Date: Sun, 9 Jun 2002 23:25:56 -0400
M2 sells an upgrade kit which supposedly is the cat's meow. It improves gain, F/B and makes certain physical improvements. I would seriously consider it. This upgrades the 34 to the replacement model
/archives//html/Towertalk/2002-06/msg00118.html (7,880 bytes)

355. [Towertalk] KT34XA QUESTION (score: 123)
Author: k2av@contesting.com (Guy Olinger, K2AV)
Date: Mon, 10 Jun 2002 10:12:04 -0400
Noll, W9RN, posed the original question, not I. I support the upgrade. 73 changes (mechanical) which can affect trap resonant frequencies. A call to Mike at M2 will give you all the info you need. if
/archives//html/Towertalk/2002-06/msg00124.html (8,075 bytes)

356. [Towertalk] rope (score: 123)
Author: k2av@contesting.com (Guy Olinger, K2AV)
Date: Sat, 15 Jun 2002 21:10:31 -0400
Not to minimize your friend's death, not at all. Speaking technically, this may mean that stretchy rope should not be used with severe loads, or with heavy loads on pulleys using friction or sleeve b
/archives//html/Towertalk/2002-06/msg00237.html (10,904 bytes)

357. [Towertalk] WX0B Six-Pack (score: 123)
Author: k2av@contesting.com (Guy Olinger, K2AV)
Date: Tue, 18 Jun 2002 22:10:44 -0400
1) The design is not bad. Too many of them out there working FB for that. 2) You say relays, assuming you really mean more than one exhibits the problem. It is unlikely that six relays are all bad wi
/archives//html/Towertalk/2002-06/msg00286.html (11,956 bytes)

358. [Towertalk] Re: [Force 12 Talk] XR dilemma (score: 123)
Author: k2av@contesting.com (Guy Olinger, K2AV)
Date: Mon, 24 Jun 2002 10:20:24 -0400
The original post was about using a C31XR on EIGHTEEN POINT ONE MHz. That's a band it was not designed for. And that a low dipole would beat it. Where did you get **TEN** meters from? Stick to the su
/archives//html/Towertalk/2002-06/msg00360.html (10,855 bytes)

359. [Towertalk] Guy wire resonance. Break it up or use stubs? (score: 123)
Author: k2av@contesting.com (Guy Olinger, K2AV)
Date: Mon, 24 Jun 2002 22:50:03 -0400
I've spent as much time as anyone worrying over guy wire resonances. The ARRL anti-resonant sections are a myth. They don't work because the guy wires are in the antenna near field and currents are N
/archives//html/Towertalk/2002-06/msg00370.html (9,614 bytes)

360. [Towertalk] Lost My Tower Tuesday (score: 123)
Author: k2av@contesting.com (Guy Olinger, K2AV)
Date: Thu, 27 Jun 2002 23:30:24 -0400
For this one, fill the bottom of the legs up to above ground with that dreadful expanding insulation foam (Great Stuff, etc), and just above the foam drill one 1/8 inch hole. You'll have to clean out
/archives//html/Towertalk/2002-06/msg00444.html (9,140 bytes)


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