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Total 232 documents matching your query.

141. Re: [TowerTalk] Taller tower, shorter mast or vice versa? (score: 1)
Author: "Tower (K8RI)" <tower@rogerhalstead.com>
Date: Wed, 21 Jul 2004 19:59:13 -0400
I have a mast extending 30 feet above the top of a 45G which is at 100 feet. I use two thrust bearings to eliminate any side loads on the rotor which is a PST-61. To work on the antennas http://www.r
/archives//html/Towertalk/2004-07/msg00585.html (10,012 bytes)

142. Re: [TowerTalk] Taller tower, shorter mast or vice versa? (score: 1)
Author: "Tower (K8RI)" <tower@rogerhalstead.com>
Date: Wed, 21 Jul 2004 21:50:46 -0400
the Doesn't even take that. Tape measure to the base of the tower and a protracter, or transit. You know the base and two angles so you can easily compute the height. Or you can skip the computing a
/archives//html/Towertalk/2004-07/msg00591.html (10,078 bytes)

143. Re: [TowerTalk] Towerheight (score: 1)
Author: "Tower (K8RI)" <tower@rogerhalstead.com>
Date: Thu, 22 Jul 2004 00:23:25 -0400
Here, as in Midland Michigan (Homer Township) The tower is the supporting structure and the mast is not figured as part of that. Zoning requires any tower over 80 feet be properly engineered. They a
/archives//html/Towertalk/2004-07/msg00600.html (9,840 bytes)

144. Re: [TowerTalk] Power lines, hawks,and fire ignition (slightly off-topic) (score: 1)
Author: "Tower (K8RI)" <tower@rogerhalstead.com>
Date: Thu, 22 Jul 2004 00:41:02 -0400
OTOH twice the height isn't practical here. The tower is far enough from the line that no part of it or any antenna even if turned vertical could come within about 30 feet of the line. Roger Halstead
/archives//html/Towertalk/2004-07/msg00601.html (10,424 bytes)

145. Re: [TowerTalk] Re: Thrust bearing (score: 1)
Author: "Tower (K8RI)" <tower@rogerhalstead.com>
Date: Thu, 22 Jul 2004 17:38:18 -0400
Likewise, I use two thrust bearings and unlike others here, I use the thrust bearings to support all the weight of the antenna system which is substantial. Probably on the order of 600#, give or take
/archives//html/Towertalk/2004-07/msg00658.html (9,417 bytes)

146. Re: [TowerTalk] Re: Thrust bearing (score: 1)
Author: "Tower (K8RI)" <tower@rogerhalstead.com>
Date: Fri, 23 Jul 2004 12:19:36 -0400
If I understand correctly Jerry, you are just supporting the mast with the top of the thrust bearing, leaving the mast free to slide up and down in the bearing. It is serving as a guide to take the s
/archives//html/Towertalk/2004-07/msg00678.html (15,830 bytes)

147. Re: [TowerTalk] Lightning protection questions. (score: 1)
Author: "Tower (K8RI)" <tower@rogerhalstead.com>
Date: Sun, 25 Jul 2004 01:16:31 -0400
The only silversolder I've ever seen was about as close to brazing as you could get without actually brazing. I did a lot of it over the years, attaching pure silver coils to water blocks. The coils
/archives//html/Towertalk/2004-07/msg00718.html (14,985 bytes)

148. Re: [TowerTalk] Lightning protection questions. (score: 1)
Author: "Tower (K8RI)" <tower@rogerhalstead.com>
Date: Tue, 27 Jul 2004 17:53:00 -0400
With practice you can fill holes with the stuff. It's just more difficult if you haven't spent time working with it. Smaller tip and OxyAcetylene. Evn the high silver content is as good as or better
/archives//html/Towertalk/2004-07/msg00782.html (9,652 bytes)

149. Re: [TowerTalk] spider balls (score: 1)
Author: "Tower (K8RI)" <tower@rogerhalstead.com>
Date: Tue, 27 Jul 2004 23:24:52 -0400
I have some tower work and will be up on top in a few weeks. As the tower here has been getting hit about 3 times a year on average it might make a good test even if one example is still antidotal. R
/archives//html/Towertalk/2004-07/msg00792.html (8,648 bytes)

150. Re: [TowerTalk] Homebrew freestanding mast (score: 1)
Author: "Tower (K8RI)" <tower@rogerhalstead.com>
Date: Wed, 28 Jul 2004 20:04:29 -0400
Are your talking about the one WD8RXP in Ithaca Michigan built? That one is in QST, from January 1987. Page 15. It's also the cover. The title of the article was "Mid-Michigan Skyhook". It's not a ma
/archives//html/Towertalk/2004-07/msg00866.html (12,307 bytes)

151. Re: [TowerTalk] Homebrew freestanding mast (score: 1)
Author: "Tower (K8RI)" <tower@rogerhalstead.com>
Date: Thu, 29 Jul 2004 00:21:56 -0400
I'd like to see a crank up design rather than a fold over. Friend of mine, (K8KNY) had one of these fold overs about 20 years ago at Forrest Hill Michigan. Almost identiacal excep he used concrete in
/archives//html/Towertalk/2004-07/msg00884.html (12,141 bytes)

152. Re: [TowerTalk] Lightning Energy (score: 1)
Author: "Tower (K8RI)" <tower@rogerhalstead.com>
Date: Fri, 30 Jul 2004 16:16:46 -0400
Another thought, or data point: People think of lightning striking under the storm, but I've seen lightning bolts come out of a cloud horizontally. One was a straight line 7 or 8 miles long that then
/archives//html/Towertalk/2004-07/msg00995.html (10,112 bytes)

153. Re: [TowerTalk] Lightning Protection Corp & Bucs Stadium? (score: 1)
Author: "Tower (K8RI)" <tower@rogerhalstead.com>
Date: Sun, 1 Aug 2004 01:38:03 -0400
Kinda makes me think of the outfit that used to sell magnets that fit around your water pipes to remove the ions. Roger Halstead (K8RI, EN73 & ARRL Life Member) N833R, World's Oldest Debonair (S# CD-
/archives//html/Towertalk/2004-08/msg00001.html (8,653 bytes)

154. [TowerTalk] Rohn Torque Bar confusion (score: 1)
Author: "Tower (K8RI)" <tower@rogerhalstead.com>
Date: Tue, 3 Aug 2004 12:30:21 -0400
I've noted a bit of confustion on the effectiveness of torque bars. First, torque bars do work when rigidly installed. Second they work without resorting to 6 point guys (2 per arm) Third, they are m
/archives//html/Towertalk/2004-08/msg00053.html (9,555 bytes)

155. Re: [TowerTalk] Rohn Torque Bar confusion (score: 1)
Author: "Tower (K8RI)" <tower@rogerhalstead.com>
Date: Tue, 3 Aug 2004 15:30:54 -0400
I thought that was what I said, but in plain language. <:-)) Rephrased, the work far better with two guy lines than they do with one, but even with one there is more resistance to rotation than witho
/archives//html/Towertalk/2004-08/msg00056.html (14,984 bytes)

156. Re: [TowerTalk] Rohn Torque Bar confusion (score: 1)
Author: "Tower (K8RI)" <tower@rogerhalstead.com>
Date: Wed, 4 Aug 2004 13:29:34 -0400
One more thing to think about and that is the type of guys used. Although EHS is very strong, it is heavy and that leads to a deep catenary. EHS may not stretch measurably unless badly over stressed
/archives//html/Towertalk/2004-08/msg00099.html (16,511 bytes)

157. Re: [TowerTalk] Rohn Torque Bar confusion (score: 1)
Author: "Tower (K8RI)" <tower@rogerhalstead.com>
Date: Wed, 4 Aug 2004 18:45:10 -0400
<snip - gotta look up the info for this part. I lent my new 1986? catalog I can say, without a doubt, the one ton is a small fraction of what a 25 G is rated to support. If you are willing to settle
/archives//html/Towertalk/2004-08/msg00111.html (11,214 bytes)

158. Re: [TowerTalk] Lightning protection (score: 1)
Author: "Tower (K8RI)" <tower@rogerhalstead.com>
Date: Wed, 4 Aug 2004 18:49:37 -0400
When I had our service changed to undergrund the linemen told me they have more problems with underground service feeds than the overhead due to lightning. Roger Halstead (K8RI, EN73 & ARRL Life Memb
/archives//html/Towertalk/2004-08/msg00112.html (11,136 bytes)

159. Re: [TowerTalk] FS: 60 ft. Rohn 45G Tower... "plus"... (score: 1)
Author: "Tower (K8RI)" <tower@rogerhalstead.com>
Date: Sat, 7 Aug 2004 11:46:00 -0400
Roger Halstead (K8RI, EN73 & ARRL Life Member) N833R, World's Oldest Debonair (S# CD-2) www.rogerhalstead.com Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and
/archives//html/Towertalk/2004-08/msg00145.html (8,619 bytes)

160. Re: [TowerTalk] UNR-Rohn Galvanized Guy Wire 6/20 (score: 1)
Author: "Tower (K8RI)" <tower@rogerhalstead.com>
Date: Sat, 7 Aug 2004 11:56:29 -0400
The 6/20 means the cable consists of 6 individual strands of #20 wire. However you need to know the what kind of steel to know the strength. Radio Shack sells a cable similar to that and it is very s
/archives//html/Towertalk/2004-08/msg00146.html (9,159 bytes)


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