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41. [Towertalk] (no subject) (score: 1)
Author: k1ttt@arrl.net (David Robbins)
Date: Wed, 4 Dec 2002 06:50:39 -0500 (EST)
they are worm gear. there are 2 wires for motor drive, 3 for indicator, and in the larger ones (2700/2800) the 6th line is a switch that detects getting close to the limits and signals the control bo
/archives//html/Towertalk/2002-12/msg00157.html (8,290 bytes)

42. [Towertalk] (no subject) (score: 1)
Author: k1ttt@arrl.net (David Robbins)
Date: Wed, 4 Dec 2002 21:18:00 -0000
indicator, detects the based thanks to pete for pointing this out, there is no electrical brake in the Yaesu rotors, but there is some kind of a mechanical spring and cam arrangement on the motor en
/archives//html/Towertalk/2002-12/msg00183.html (8,321 bytes)

43. [Towertalk] Rohn 55 Guy Bracket Help! (score: 1)
Author: k1ttt@arrl.net (David Robbins)
Date: Sun, 8 Dec 2002 17:38:45 -0000
If I remember right from a few years ago when I put up some 55g the brackets are not exceptionally tight. I would not expect them to be able to just grab the leg and hold the guy forces, that would t
/archives//html/Towertalk/2002-12/msg00267.html (10,276 bytes)

44. [Towertalk] Glen Martin Cable Clamp Diagram (score: 1)
Author: k1ttt@arrl.net (David Robbins)
Date: Mon, 11 Nov 2002 22:42:43 -0000
I seem to remember a discussion long ago about this. I think it has something to do with how slippery the outer jacket is. Since it is very flexible and can slip easily in the eye they wanted the ext
/archives//html/Towertalk/2002-11/msg00207.html (13,897 bytes)

45. [Towertalk] OPTIMIZED ANTENNA SYSTEM (score: 1)
Author: k1ttt@arrl.net (David Robbins)
Date: Fri, 15 Nov 2002 11:58:43 -0000
Optimum for what? And from where? For my use I would consider a stack of 6's to be too narrow for contesting from the northeast. Up here a stack of 4's is probably better to cover more of Europe at o
/archives//html/Towertalk/2002-11/msg00334.html (9,657 bytes)

46. [Towertalk] OPTIMIZED ANTENNA SYSTEM (score: 1)
Author: k1ttt@arrl.net (David Robbins)
Date: Fri, 15 Nov 2002 13:27:46 -0000
50-60 degrees would be about right. I'm kind of surprised the pv design shows that beamwidth though I would expect it to be narrower. The top antennas on my 15m and 20m stacks are reoptimized telrex
/archives//html/Towertalk/2002-11/msg00340.html (9,276 bytes)

47. [Towertalk] Re: Virus (score: 1)
Author: k1ttt@arrl.net (David Robbins)
Date: Tue, 1 Oct 2002 13:15:14 -0400 (EDT)
its most likely the klez virus that you are noticing. unfortunately without a detailed examination of the raw headers of the message you can't really tell where it is coming from. the klez virus sea
/archives//html/Towertalk/2002-10/msg00029.html (8,771 bytes)

48. [Towertalk] Re: [Dx-qsl] virus in (1000mp) strange behaviour of FT1000mp on 28mhz (score: 1)
Author: k1ttt@arrl.net (David Robbins)
Date: Thu, 3 Oct 2002 23:11:10 -0000
I REPEAT!! BOTH KLEZ AND THE NEW BUG&*(^% VIRUS FAKE THE "FROM" ADDRESS TO BE A RANDOM ADDRESS FOUND ON THE INFECTED MACHINE! ANYONE'S ADDRESS CAN SHOW UP THERE AND IT MOST LIKELY IS NOT THE PERSON W
/archives//html/Towertalk/2002-10/msg00105.html (15,808 bytes)

49. [Towertalk] Moving To New QTH (score: 1)
Author: k1ttt@arrl.net (David Robbins)
Date: Sat, 19 Oct 2002 11:59:38 -0000
beheath there are some well documented 'weird things' about animals and high voltage transmission. Cows are especially sensitive to small voltages caused by the electric field under the lines and al
/archives//html/Towertalk/2002-10/msg00619.html (10,133 bytes)

50. [Towertalk] Is there need for a Beverage when using a 4-Square? (score: 1)
Author: k1ttt@arrl.net (David Robbins)
Date: Tue, 29 Oct 2002 13:33:28 -0500 (EST)
definately, maybe, yes, possibly, it depends... more antennas are usually better. having different antennas for both transmit and receive is nice when possible. David Robbins K1TTT e-mail: mailto:k1t
/archives//html/Towertalk/2002-10/msg00840.html (8,740 bytes)

51. [Towertalk] Dismantling towers (score: 1)
Author: k1ttt@arrl.net (David Robbins)
Date: Thu, 19 Sep 2002 13:44:28 -0400 (EDT)
with rohn 25 my prefered method is to come off the tower at the bottom set of guys, take them off then lift the tower off the base and use the guys to lay it over like a field day tower. its harder t
/archives//html/Towertalk/2002-09/msg00661.html (9,304 bytes)

52. [Towertalk] 402CD coil mods (score: 1)
Author: k1ttt@arrl.net (David Robbins)
Date: Fri, 20 Sep 2002 16:22:41 -0000
w/ used (the After I did that one I used the big heat shrink that has the melting sealant in it. I hadn't cut off all the heat shrink that was on the coil so I only put a short piece on each end ove
/archives//html/Towertalk/2002-09/msg00735.html (7,596 bytes)

53. [Towertalk] qsp from usenet (score: 1)
Author: k1ttt@arrl.net (David Robbins)
Date: Sat, 21 Sep 2002 12:44:02 -0000
An opportunity for someone. Don't contact me, this is just copied from rec.radio.amateur.antenna. <quote> I have a non ham friend who recently bought a house in McLean, Va. that has a 60' self suppor
/archives//html/Towertalk/2002-09/msg00754.html (6,807 bytes)

54. [Towertalk] SWR & Speed of Light? (score: 1)
Author: k1ttt@arrl.net (David Robbins)
Date: Thu, 26 Sep 2002 10:02:10 -0000
Sri, nothing here of any practical use. This is just a way for students to observe the phenomenon of phase velocity exceeding the speed of light. No way to transfer energy or information any faster t
/archives//html/Towertalk/2002-09/msg00848.html (9,028 bytes)

55. [Towertalk] RE: [YCCC] 4-square vs 40-2CD (score: 1)
Author: k1ttt@arrl.net (David Robbins)
Date: Mon, 8 Jul 2002 18:04:50 -0000
Interesting. But you should really compare them over a longer period, especially during good spring or fall propagation. In many years of experience here a full size 4-square with only 4 radials rais
/archives//html/Towertalk/2002-07/msg00197.html (14,600 bytes)

56. [Towertalk] Re: Coax Connector Losses - Does anyone know? (score: 1)
Author: k1ttt@arrl.net (David Robbins)
Date: Thu, 11 Jul 2002 21:45:47 -0000
First learn to do a real thin smooth tinning job and trim the end of it fairly smooth so it doesn't hang up on the threads or lip inside the pl259. then a SMALL dab of silicone grease on the cut end
/archives//html/Towertalk/2002-07/msg00299.html (10,602 bytes)

57. [Towertalk] Statics 101 (score: 1)
Author: k1ttt@arrl.net (David Robbins)
Date: Fri, 12 Jul 2002 10:17:19 -0000
ARGH! How many times do we have to go through this. When you have a 2:1 advantage the ground crew only pulls down on the pole with 1/2 the weight of the load so the load on the gin pole is reduced by
/archives//html/Towertalk/2002-07/msg00334.html (14,767 bytes)

58. [Towertalk] grounding system (score: 1)
Author: k1ttt@arrl.net (David Robbins)
Date: Mon, 29 Jul 2002 13:05:15 -0000
too me And I would be out of a job! Most of my job is writing software that simulates lighting strokes to high voltage power lines. We are still doing basic research on things as basic as what happe
/archives//html/Towertalk/2002-07/msg00786.html (9,584 bytes)

59. [Towertalk] spring cleaning sale (score: 1)
Author: k1ttt@arrl.net (David Robbins)
Date: Mon, 10 Jun 2002 18:10:51 -0000
Maybe not all tower/antenna stuff, but there are a few things anyway. Spring cleaning a bit late, got to get rid of excess stuff! This is going fast, one piece sold before I even got this message wri
/archives//html/Towertalk/2002-06/msg00127.html (9,128 bytes)

60. [Towertalk] dead grass (score: 1)
Author: k1ttt@arrl.net (David Robbins)
Date: Sat, 29 Jun 2002 17:42:06 -0000
Is there something that leaches off older towers that kills grass? I don't remember it happening the first 10 years or so, but now on my older towers I have been noticing that the grass is being kill
/archives//html/Towertalk/2002-06/msg00495.html (6,863 bytes)


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