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241. [TowerTalk] insulators (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Fri, 29 Jul 2005 01:13:29 -0000
Remember a couple months ago I had a couple big insulators I was trying to figure out what to do with? Well BIG things are under way. So BIG that they now have their own web site: http://www.berkshir
/archives//html/Towertalk/2005-07/msg00798.html (8,005 bytes)

242. Re: [TowerTalk] insulators (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Fri, 29 Jul 2005 02:10:49 -0000
Of course it is germane to the reflector... I think some of those insulators would make nice base insulators for full size 160m verticals made out of rohn 25 or even 65 if you wanted them fatter! the
/archives//html/Towertalk/2005-07/msg00802.html (9,488 bytes)

243. Re: [TowerTalk] [YCCC] insulators (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Fri, 29 Jul 2005 02:18:15 -0000
Ouch! Don't be surprised if the web site is a bit slow, my poor little 128k isdn line is pumping its little bits out as fast as it can... but 700 hits last hour is probably a record for me. David Rob
/archives//html/Towertalk/2005-07/msg00803.html (9,940 bytes)

244. Re: [TowerTalk] Tower Base info sought (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Sat, 30 Jul 2005 10:53:24 -0000
First, no one on here will give you definitive design specs for your tower. The 'proper' answer is to build it as the manufacturer specifies assuming your soil is normal and you are in a wind zone th
/archives//html/Towertalk/2005-07/msg00828.html (10,568 bytes)

245. Re: [TowerTalk] Guy Effects (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Sun, 31 Jul 2005 17:08:51 -0000
In all likelihood it will be pulled over by the other two sets of guys. David Robbins K1TTT e-mail: mailto:k1ttt@arrl.net web: http://www.k1ttt.net AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.ne
/archives//html/Towertalk/2005-07/msg00866.html (9,055 bytes)

246. Re: [TowerTalk] Sparky Pays a Visit (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Wed, 3 Aug 2005 17:17:00 -0000
About all you can do in that case is: 1. spread out the energy as much as possible, bury radials just below the surface out to about 50' or so... they don't have to be straight, and they don't all ha
/archives//html/Towertalk/2005-08/msg00056.html (13,887 bytes)

247. Re: [TowerTalk] Rohn 25 base3 (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Thu, 4 Aug 2005 19:16:08 -0000
They used to at least. The bpc24g was a flat base with just a center and one side hole for some reason. But they also had the pbh25g that was a hinged base plate that had holes around the perimeter t
/archives//html/Towertalk/2005-08/msg00095.html (11,727 bytes)

248. Re: [TowerTalk] Ganing knowlrdge of phased directional HFthru 1 gHZ (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Thu, 11 Aug 2005 11:46:34 -0000
The most important knowledge you will gain is by talking to your insurance company about the cost of proper insurance, and the requirements for training and qualification of operators. David Robbins
/archives//html/Towertalk/2005-08/msg00233.html (8,903 bytes)

249. Re: [TowerTalk] Are All Low-Pass Filters Alike? (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Tue, 16 Aug 2005 11:10:44 -0000
The most important question to ask about TVI filters is "Do I have a transmitter harmonic problem?". Remember, TVI filters can only stop harmonics... and they can only stop harmonics that come from B
/archives//html/Towertalk/2005-08/msg00332.html (10,864 bytes)

250. Re: [TowerTalk] pr25g (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Wed, 17 Aug 2005 18:47:04 -0000
Sounds like a good fit to me. It is not unusual to find 25g legs bent by more than that in shipping. Sounds like time for a piece of pipe over the end of the leg and a little elbow grease to make the
/archives//html/Towertalk/2005-08/msg00385.html (8,500 bytes)

251. [TowerTalk] YCCC Picnic (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Sat, 27 Aug 2005 12:46:25 -0000
If you can't make the picnic you can still watch on the webcams on my web site. You can see who the chow hounds are on camera 2 and see who is operating on camera 1. We will be playing in the OQP for
/archives//html/Towertalk/2005-08/msg00526.html (7,310 bytes)

252. Re: [TowerTalk] insurance (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Sun, 28 Aug 2005 22:44:48 -0000
Ah, the 'favorite adjuster' stories.... long ago, and right in this qth, I had a 40-2cd at 150' that folded in an ice storm. I contacted the insurance company which told me to get an estimate to get
/archives//html/Towertalk/2005-08/msg00552.html (10,383 bytes)

253. Re: [TowerTalk] Rotator Wire Vendor (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Wed, 31 Aug 2005 20:12:44 -0000
Get a cheap 6 conductor for the indicator lines and then go to home depot or your local equivalent and get either 12-2 low voltage cable at about $.23/ft or plain old nm 12-2 with ground for a bit mo
/archives//html/Towertalk/2005-08/msg00644.html (10,706 bytes)

254. Re: [TowerTalk] Rain static (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Thu, 1 Sep 2005 12:08:15 -0000
Not really. If it were charge from drops it would spread out down the conductive structure of grounded elements and bleed off quickly that way. This would also not explain clear air 'precipitation'
/archives//html/Towertalk/2005-09/msg00009.html (11,150 bytes)

255. Re: [TowerTalk] Rain static (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Thu, 1 Sep 2005 12:50:18 -0000
droplets aren't even needed, as I pointed out it is common for 'precipitation' static to occur even without rain or snow. All it takes is the increase in electric field gradient under a charged clou
/archives//html/Towertalk/2005-09/msg00013.html (8,394 bytes)

256. Re: [TowerTalk] Rain static (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Thu, 1 Sep 2005 12:58:03 -0000
again, note that precipitation is not even required. The electric field near the earth increases enough to cause corona discharge from antennas just due to the presence of a charged cloud above you.
/archives//html/Towertalk/2005-09/msg00014.html (9,009 bytes)

257. Re: [TowerTalk] Rain static (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Thu, 1 Sep 2005 17:20:40 -0000
in at least some cases yes, I had a radio front end blown out once by pure electric field gradient. I was in the high desert in Colorado, I think it was, and started hearing a ticking in the radio a
/archives//html/Towertalk/2005-09/msg00032.html (10,323 bytes)

258. Re: [TowerTalk] Need Advice on Long Run of Cables to Tower (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Fri, 2 Sep 2005 18:15:34 -0000
Probably, calculate the voltage drop based on the resistance of the wire and the current draw of the motor. If its more than 10 volts go to the next larger wire and try again. I would guess 8ga may
/archives//html/Towertalk/2005-09/msg00064.html (10,188 bytes)

259. Re: [TowerTalk] ground radials and railroad tracks (score: 1)
Author: "David Robbins K1TTT" <k1ttt@arrl.net>
Date: Tue, 6 Sep 2005 20:52:25 -0000
You also must be careful around railroad tracks as they can pick up large induced voltages and currents from the power lines that often run along their right of ways. David Robbins K1TTT e-mail: mail
/archives//html/Towertalk/2005-09/msg00167.html (11,984 bytes)

260. Re: [TowerTalk] Cushcraft XM240 Poor Connections (score: 1)
Author: "David Robbins" <k1ttt@arrl.net>
Date: Fri, 9 Sep 2005 12:45:53 -0000
If you carefully trim back the heatshrink you won't have to replace all of it. I was able to replace the self tappers with bolts and used some of the gunk filled heatshrink only about two inches long
/archives//html/Towertalk/2005-09/msg00224.html (10,474 bytes)

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