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Total 435 documents matching your query.

301. Re: [TowerTalk] Life expectancy of RG-213 (score: 1)
Author: TexasRF@aol.com
Date: Fri, 27 Aug 2010 13:25:17 EDT
Tom and all, very few 8X cables are made with non-contaminating jackets. I don't have a Belden reference here but I would be surprised if their's is non-contaminating. Quite a few years ago, I had 8X
/archives//html/Towertalk/2010-08/msg00556.html (9,710 bytes)

302. Re: [TowerTalk] Testing a vacuum variable Cap for an Inv-L (score: 1)
Author: TexasRF@aol.com
Date: Sun, 29 Aug 2010 14:53:50 EDT
Krish, without some kind of hv tester your testing will be quite limited. Maybe you could "rig" a test using your linear amplifier hv power supply. If you can locate an old VOM that measures high vol
/archives//html/Towertalk/2010-08/msg00617.html (8,082 bytes)

303. Re: [TowerTalk] gided tower (score: 1)
Author: TexasRF@aol.com
Date: Fri, 17 Sep 2010 08:18:49 EDT
Tom/all, While it is readable, it sure slows me down. Probably means I am not nearly as smart as I thought! 73, Gerald K5GW In a message dated 9/16/2010 10:21:23 P.M. Central Daylight Time, w7why@fro
/archives//html/Towertalk/2010-09/msg00440.html (9,136 bytes)

304. Re: [TowerTalk] securing loose element ends (score: 1)
Author: TexasRF@aol.com
Date: Thu, 23 Sep 2010 10:35:55 EDT
Or, widen the existing slot a bit. Takes only one cut instead of two, preserves strength, less elbow stress. A Dremel tool works great for this. 73, Gerald K5GW In a message dated 9/23/2010 8:50:45 A
/archives//html/Towertalk/2010-09/msg00613.html (14,865 bytes)

305. Re: [TowerTalk] RS-232 control of M2 Rotator (score: 1)
Author: TexasRF@aol.com
Date: Mon, 27 Sep 2010 15:39:06 EDT
Would those unprintable characters perhaps be the data you are looking for? Many devices like this return ascii values that require further manipulation to derive actual position data. US Digital enc
/archives//html/Towertalk/2010-09/msg00671.html (13,699 bytes)

306. Re: [TowerTalk] SteppIR vertical (score: 1)
Author: TexasRF@aol.com
Date: Mon, 27 Sep 2010 16:10:55 EDT
And further, if you don't let the housing breathe, that condensation can accumulate and eventually fill it with water. Trying to seal a box like that will never prevent vapor laden atmosphere from en
/archives//html/Towertalk/2010-09/msg00677.html (12,621 bytes)

307. Re: [TowerTalk] RS-232 control of M2 Rotator (score: 1)
Author: TexasRF@aol.com
Date: Mon, 27 Sep 2010 16:13:33 EDT
Hi Codrut, do you know the send and receive data format for the M2 rotator? 73, Gerald K5GW In a message dated 9/27/2010 3:06:58 P.M. Central Daylight Time, yo3dmu@yahoo.com writes: Hi, You can try t
/archives//html/Towertalk/2010-09/msg00678.html (15,792 bytes)

308. Re: [TowerTalk] RS-232 control of M2 Rotator (score: 1)
Author: TexasRF@aol.com
Date: Mon, 27 Sep 2010 16:35:20 EDT
Heck, I am lazy! I hoped you would just tell me! Thanks/73, Gerald K5GW In a message dated 9/27/2010 3:29:17 P.M. Central Daylight Time, yo3dmu@yahoo.com writes: Hi Gerald, You can find attached both
/archives//html/Towertalk/2010-09/msg00681.html (16,473 bytes)

309. Re: [TowerTalk] TH-7 10M Dire (score: 1)
Author: TexasRF@aol.com
Date: Wed, 29 Sep 2010 19:56:12 EDT
The decimal value for any fraction is the top number divided by the bottom number. 7 divided by 16 is .4375. neither 3/8" or 1/2" tubing will work for that. In over 15 years of selling aluminum tubin
/archives//html/Towertalk/2010-09/msg00746.html (8,148 bytes)

310. Re: [TowerTalk] Min spacing to 80m yagi ? (score: 1)
Author: TexasRF@aol.com
Date: Wed, 6 Oct 2010 08:48:44 EDT
Jim, wouldn't you think that the 20m yagi would suffer pattern degradation while the 80m yagi would be ok? 73, Gerald K5GW In a message dated 10/6/2010 7:35:00 A.M. Central Daylight Time, jim.thom@te
/archives//html/Towertalk/2010-10/msg00038.html (8,207 bytes)

311. Re: [TowerTalk] Min spacing to 80m yagi ? (score: 1)
Author: TexasRF@aol.com
Date: Wed, 6 Oct 2010 22:43:00 EDT
Danged new math! 73/k5gw In a message dated 10/6/2010 9:33:20 P.M. Central Daylight Time, df3kv@t-online.de writes: I donīt think so. And 3.5MHz x 3 = 10.5MHz. 73 Peter, DJ7WW The harmonic relationsh
/archives//html/Towertalk/2010-10/msg00047.html (8,515 bytes)

312. Re: [TowerTalk] Sigma 180-S / 280-S (score: 1)
Author: TexasRF@aol.com
Date: Mon, 11 Oct 2010 11:27:26 EDT
Jim, harmonic resonance of a loaded radiator is no longer related to wavelengths like a full sized radiator. The loading inductance is lumped and has a reactance that is linear with frequency. The eq
/archives//html/Towertalk/2010-10/msg00089.html (8,792 bytes)

313. Re: [TowerTalk] Bringing feedlines through the floor (score: 1)
Author: TexasRF@aol.com
Date: Fri, 22 Oct 2010 10:20:56 EDT
Dave and all, those spade bits are quite a bargain considering you can buy a whole set for about the cost of a single metal bit or hole saw. In addition, they work very well on aluminum, with a bit o
/archives//html/Towertalk/2010-10/msg00265.html (10,829 bytes)

314. Re: [TowerTalk] Resonant boom (score: 1)
Author: TexasRF@aol.com
Date: Sun, 24 Oct 2010 08:33:58 EDT
Since the 20m elements are insulated, would installing a ground strap to an element near the boom detune things enough to work? Could an additional "dummy" element or elements be added temporarily fo
/archives//html/Towertalk/2010-10/msg00295.html (9,656 bytes)

315. Re: [TowerTalk] 5 x conductor rotor cable ? (score: 1)
Author: TexasRF@aol.com
Date: Mon, 25 Oct 2010 11:30:05 EDT
8A while running; how many amps to start? I had to locate the 24vdc power supply at the prop pitch for a 250ft and a 700ft long run at one time. The message here is to test with the cable before inst
/archives//html/Towertalk/2010-10/msg00314.html (7,840 bytes)

316. Re: [TowerTalk] Is there any difference between a Ham4 VS T2X controller? (score: 1)
Author: TexasRF@aol.com
Date: Mon, 25 Oct 2010 13:36:41 EDT
And the extra LED that let's you know the brake switch is depressed (as if you would not know that). 73, Gerald K5GW In a message dated 10/25/2010 12:20:04 P.M. Central Daylight Time, n8de@thepoint.n
/archives//html/Towertalk/2010-10/msg00320.html (8,622 bytes)

317. Re: [TowerTalk] Mystery hardline (score: 1)
Author: TexasRF@aol.com
Date: Wed, 3 Nov 2010 16:48:16 EDT
Guy, Bob and all, the 50 vs 75 ohm question can be solved with a hand calculator after taking a couple of measurements; the coax center conductor and shield diameters. It most likely has a foam diele
/archives//html/Towertalk/2010-11/msg00038.html (11,389 bytes)

318. Re: [TowerTalk] Impedance at the Feedpoint (score: 1)
Author: TexasRF@aol.com
Date: Sat, 6 Nov 2010 16:35:47 EDT
Several hundred ohms most likely. Many factors come into play, such as radiator diameter and objects within it's field that are coupling into the antenna. 73, Gerald K5GW In a message dated 11/6/2010
/archives//html/Towertalk/2010-11/msg00063.html (7,588 bytes)

319. Re: [TowerTalk] Shunt Fed Tower (score: 1)
Author: TexasRF@aol.com
Date: Sun, 7 Nov 2010 19:52:02 EST
For matching a 25 +j0 load at 1.8 MHz, a 25 ohm reactance can be connected from the measurement point to ground. Then the series capacitor can then be tweaked for resonance and minimum vswr. The shun
/archives//html/Towertalk/2010-11/msg00079.html (9,015 bytes)

320. Re: [TowerTalk] A3S tribander gone bad (score: 1)
Author: TexasRF@aol.com
Date: Mon, 15 Nov 2010 07:48:27 EST
Measured where? At the feed point? At the end of XXft of ?? coax? 73/k5gw In a message dated 11/15/2010 6:33:09 A.M. Central Standard Time, rob.katz@thelegacycenter.com writes: I am putting back up a
/archives//html/Towertalk/2010-11/msg00227.html (7,941 bytes)


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