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241. [Towertalk] Rohn 25G Questions (score: 1)
Author: n4kg@juno.com (n4kg@juno.com)
Date: Wed, 7 Aug 2002 10:47:01 -0600
Unfortunately, the fine thread hardware supplied with R25 towers has a nasty habit of rusting over time. Coarse threaded galvanized hardware should prevent this condition. (I know, it's not what the
/archives//html/Towertalk/2002-08/msg00192.html (10,901 bytes)

242. [Towertalk] HyGain Rotor Start Cap (score: 1)
Author: n4kg@juno.com (n4kg@juno.com)
Date: Fri, 9 Aug 2002 03:21:14 -0600
Good information. I connect the Rotor Start Caps at the BASE of my tower on the long runs, allowing me to double up the CW and CCW motor wires to the house. Tom N4KG _________________________________
/archives//html/Towertalk/2002-08/msg00280.html (7,739 bytes)

243. [Towertalk] TH6DXX trap end caps (score: 1)
Author: n4kg@juno.com (n4kg@juno.com)
Date: Fri, 9 Aug 2002 11:53:22 -0600
That was Roger Cox of HyGain and he later RETRACTED that statement. Even if were true there are ways around the problem: First, on the cover closest to the boom, it does NOT matter since the cover is
/archives//html/Towertalk/2002-08/msg00296.html (9,077 bytes)

244. [Towertalk] cable TV hardline (score: 1)
Author: n4kg@juno.com (n4kg@juno.com)
Date: Fri, 9 Aug 2002 04:21:51 -0600
I've been using 3/4 inch CATV for my 300 to 600 ft runs in multiples of 1/2 WL (without baluns) for10 to 20 years. My BEST connections (long term - NO failures) have been to simple solder the center
/archives//html/Towertalk/2002-08/msg00297.html (9,325 bytes)

245. [Towertalk] cable TV hardline (score: 1)
Author: n4kg@juno.com (n4kg@juno.com)
Date: Fri, 9 Aug 2002 17:59:29 -0600
The VF (velocity factor) or CATV Hardline is *roughly* 0.8, but the best approach is to measure it or verify that a 50 ohm load is seen again at the end of the line. For intermediate lengths, multipl
/archives//html/Towertalk/2002-08/msg00318.html (12,250 bytes)

246. [Towertalk] cable TV hardline (score: 1)
Author: n4kg@juno.com (n4kg@juno.com)
Date: Fri, 9 Aug 2002 17:59:29 -0600
The VF (velocity factor) or CATV Hardline is *roughly* 0.8, but the best approach is to measure it or verify that a 50 ohm load is seen again at the end of the line. For intermediate lengths, multipl
/archives//html/Towertalk/2002-08/msg00319.html (12,225 bytes)

247. [Towertalk] cable TV hardline (score: 1)
Author: n4kg@juno.com (n4kg@juno.com)
Date: Fri, 9 Aug 2002 17:59:29 -0600
The VF (velocity factor) or CATV Hardline is *roughly* 0.8, but the best approach is to measure it or verify that a 50 ohm load is seen again at the end of the line. For intermediate lengths, multipl
/archives//html/Towertalk/2002-08/msg00320.html (12,192 bytes)

248. [Towertalk] 160m Inverted L (score: 1)
Author: n4kg@juno.com (n4kg@juno.com)
Date: Sun, 11 Aug 2002 04:58:54 -0600
There are an infinite number of solutions. The most popular are to tune the length for resonance where the is ZERO reactance and then match the (low) real impedance to 50 ohms, OR, to adjust the leng
/archives//html/Towertalk/2002-08/msg00341.html (9,809 bytes)

249. [Towertalk] Underground wires... outdoor ducts other than pipes? (score: 1)
Author: n4kg@juno.com (n4kg@juno.com)
Date: Tue, 13 Aug 2002 09:59:40 -0600
I run my CATV hardline in shallow OPEN trenches and mow over it. Tom N4KG On Mon, 12 Aug 2002 22:16:37 -0400 "Mel Martin \(VE2DC\)" <ve2dc@rac.ca> writes: ____________________________________________
/archives//html/Towertalk/2002-08/msg00391.html (9,957 bytes)

250. [Towertalk] Underground wires... outdoor ducts other than pipes? (score: 1)
Author: n4kg@juno.com (n4kg@juno.com)
Date: Tue, 13 Aug 2002 09:59:40 -0600
I run my CATV hardline in shallow OPEN trenches and mow over it. Tom N4KG On Mon, 12 Aug 2002 22:16:37 -0400 "Mel Martin \(VE2DC\)" <ve2dc@rac.ca> writes: ____________________________________________
/archives//html/Towertalk/2002-08/msg00392.html (9,823 bytes)

251. [Towertalk] T2X Start cap at tower base? (score: 1)
Author: n4kg@juno.com (n4kg@juno.com)
Date: Thu, 15 Aug 2002 08:26:06 -0600
Putting the Start Cap at the tower base is an excellent idea. I've been doing this for years on my 2L40 at 95 ft which is 400 ft from my house. I used #14 house wiring for the CW, CCW, and solenoid r
/archives//html/Towertalk/2002-08/msg00490.html (8,469 bytes)

252. [Towertalk] Mounting fixed antennas (score: 1)
Author: n4kg@juno.com (n4kg@juno.com)
Date: Thu, 15 Aug 2002 21:17:27 -0600
My solution to this problem is to cut a piece of PVC lengthwise and place it over the tower leg to prevent chewing up the leg / galvanizing. I also drill ONE additional hole for each U bolt, spaced t
/archives//html/Towertalk/2002-08/msg00491.html (9,210 bytes)

253. [Towertalk] T2X Start cap at tower base? (score: 1)
Author: n4kg@juno.com (n4kg@juno.com)
Date: Thu, 15 Aug 2002 21:19:12 -0600
There is MORE benefit in paralleling two #18 wires (CW and CCW) than paralleling a #14 or #16 ground / solenoid wire with a #18. Tom N4KG On Wed, 14 Aug 2002 15:49:35 -0400 David Jordan <wa3gin@erols
/archives//html/Towertalk/2002-08/msg00492.html (12,709 bytes)

254. [Towertalk] Brackets for Sidemounting "fixed" antennas (score: 1)
Author: n4kg@juno.com (n4kg@juno.com)
Date: Thu, 15 Aug 2002 21:21:53 -0600
Since your tower face "points" to your desired target (EU), just take a 1/4 inch aluminum plate and drill holes for 4 U-bolts (1-1/4 inch or 1-1/2 inch with PVC shims for the legs). Tom N4KG ________
/archives//html/Towertalk/2002-08/msg00493.html (10,508 bytes)

255. [Towertalk] Fence fence go away- (score: 1)
Author: n4kg@juno.com (n4kg@juno.com)
Date: Fri, 16 Aug 2002 08:10:47 -0600
N4KG comments inserted below. The short answer is NO ! Think of a Yagi with insulated elements. ANY conductor longer than 1/2 WL out to several WL WILL act as a reflector. ANY conductor between 0.3 a
/archives//html/Towertalk/2002-08/msg00505.html (9,129 bytes)

256. [Towertalk] Sidemounting Concerns (score: 1)
Author: n4kg@juno.com (n4kg@juno.com)
Date: Fri, 16 Aug 2002 08:43:51 -0600
Here's some ANECDOTAL examples of a single leg side mounts: I had a 3L20 on a 24 ft boom mounted to ONE LEG of a R35 tower (leg diameter and thickness identical to R25) at 65 ft for several years wit
/archives//html/Towertalk/2002-08/msg00506.html (8,449 bytes)

257. [Towertalk] fence update (score: 1)
Author: n4kg@juno.com (n4kg@juno.com)
Date: Fri, 16 Aug 2002 09:05:47 -0600
Have you ever driven into a Parking Garage while listening to an AM BC station? It practically disappears, even Local Stations. The 'mesh' formed by the steel columns and rebar in the concrete is nea
/archives//html/Towertalk/2002-08/msg00507.html (8,736 bytes)

258. [Towertalk] It ain't the fence any more. (score: 1)
Author: n4kg@juno.com (n4kg@juno.com)
Date: Mon, 19 Aug 2002 00:50:44 -0600
Another possibility is that one of the feedlines between the Comtek Box and one of the elements may have some problem, such as an open shield or a contaminated shield (which has turned black), etc. T
/archives//html/Towertalk/2002-08/msg00543.html (11,962 bytes)

259. [Towertalk] It ain't the fence any more. (score: 1)
Author: n4kg@juno.com (n4kg@juno.com)
Date: Mon, 19 Aug 2002 00:50:44 -0600
Another possibility is that one of the feedlines between the Comtek Box and one of the elements may have some problem, such as an open shield or a contaminated shield (which has turned black), etc. T
/archives//html/Towertalk/2002-08/msg00544.html (11,971 bytes)

260. [Towertalk] 75 ohm hardline cable again (score: 1)
Author: n4kg@juno.com (n4kg@juno.com)
Date: Mon, 19 Aug 2002 09:17:44 -0600
Graphs of cable loss vs frequency for MANY types of cable, including RG58, RG59, RG8, RG213, CATV hardline and 50 ohm hardline can be found in the Transmission Line Chapter of any ARRL Antenna Book (
/archives//html/Towertalk/2002-08/msg00547.html (9,386 bytes)


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