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141. [TowerTalk] Lightning..slowed down 300X (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Fri, 20 Aug 2010 00:51:37 -0700
http://www.wimp.com/lightningslowed/ This is pretty unique perspective http://www.wimp.com/lightningtruck/ This is pretty rare too. later... Jim VE7RF _______________________________________________
/archives//html/Towertalk/2010-08/msg00443.html (6,638 bytes)

142. [TowerTalk] ASTM F1554 Anchor Bolts (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Wed, 25 Aug 2010 19:10:23 -0700
I checked with Portland Bolt before i sent the email , they have the material and are quite knowledgeable , however , they weren't too interested in such a small order of only 3 pieces since they had
/archives//html/Towertalk/2010-08/msg00511.html (9,239 bytes)

143. [TowerTalk] XM240 to Moxon (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Wed, 25 Aug 2010 19:35:11 -0700
Hi Jerry, Here are two mechanical designs for the 40 meter W6NL Moxon. Standard and heavy duty. The performance of the W6NL Moxon is very good. Good gain, good F/B and low VSWR across the entire band
/archives//html/Towertalk/2010-08/msg00512.html (9,285 bytes)

144. [TowerTalk] XM240 to Moxon (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Thu, 26 Aug 2010 05:48:35 -0700
Hi Jerry, Here are two mechanical designs for the 40 meter W6NL Moxon. Standard and heavy duty. A pair of two element W6NL Moxon's weighs about 100 lbs and the pair of four element Yagi's weigh a lit
/archives//html/Towertalk/2010-08/msg00514.html (7,733 bytes)

145. [TowerTalk] Baluns...again (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Fri, 27 Aug 2010 02:21:15 -0700
I just recently received a pair of AS line isolator's. I had Jay + Bob modify one of the W1JR baluns.. and put 7-16 Dins on both sides of the large NON-conductive nema box. Inside, it consist of 4 x
/archives//html/Towertalk/2010-08/msg00538.html (10,096 bytes)

146. [TowerTalk] HDX-555 relay settings (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Mon, 30 Aug 2010 17:42:29 -0700
I'm patting myself on the back now for finding TowerTalk and getting so many quick replies and good answers to my question. I thank you all. I must apologize to U.S. Towers. After posting my query an
/archives//html/Towertalk/2010-08/msg00657.html (8,404 bytes)

147. [TowerTalk] 6M coax balun (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Tue, 31 Aug 2010 19:33:23 -0700
Part looks good, but the "air core" 5 turns on the paint can is unlikely to be very effective. 73 Roger (K8RI) will give you 2083 ohms on 6m. If you use RG-393 coax, you can then stuff 5 kw CCS all d
/archives//html/Towertalk/2010-08/msg00697.html (10,136 bytes)

148. [TowerTalk] Testing a vacuum variable Cap for an Inv-L (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Thu, 2 Sep 2010 02:25:37 -0700
A question to ask is whether you really need a vacuum variable at all. Unless the antenna is close to a half wave and fed from the end, the voltage at the feedpoint is pretty low, even running very h
/archives//html/Towertalk/2010-09/msg00056.html (10,847 bytes)

149. [TowerTalk] Concrete testing (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Thu, 2 Sep 2010 06:22:13 -0700
Thank you for the suggestions. I called Advanced Testing in my area and got some information. First, I checked the trustworthiness of the concrete company. That checked out. The technical person I sp
/archives//html/Towertalk/2010-09/msg00061.html (12,541 bytes)

150. [TowerTalk] Testing a vacuum variable Cap for an Inv-L (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Fri, 3 Sep 2010 04:39:02 -0700
That's an old wives' tale. There is VERY little dielectric loss in decent coax at 2 MHz. Heck -- I used 10 ft of Commscope 3227 to resonate a transformer at the high Z feed point of an 80M half wave
/archives//html/Towertalk/2010-09/msg00102.html (12,824 bytes)

151. [TowerTalk] Antenna Rotor Speed (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Fri, 3 Sep 2010 04:46:38 -0700
I found 40 seconds for one rotation real nice for contesting after I built my own rotator. I turned a christmas tree of 5 element yagis 20-10m + 3L FS on 40m without problems, but the stress on the d
/archives//html/Towertalk/2010-09/msg00103.html (8,963 bytes)

152. [TowerTalk] Concrete testing (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Fri, 3 Sep 2010 05:42:04 -0700
concrete for a base? I can see all this if you have an gigantic hundreds of feet high superstation, but the average guy doesn't need to have his concrete analyzed. rebar/cage they say. You guy correc
/archives//html/Towertalk/2010-09/msg00107.html (12,276 bytes)

153. [TowerTalk] Rotor Cable size (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Thu, 9 Sep 2010 05:45:59 -0700
I had some C-band positioner cable that had all the wires I needed for direction indication and a pair of #10 or #12 (R&B) wires to drive the motor along with two RG-6's all molded into the one cable
/archives//html/Towertalk/2010-09/msg00200.html (8,633 bytes)

154. [TowerTalk] Antenna Swittch - Grounded or Open Unused (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Thu, 9 Sep 2010 06:01:24 -0700
Date: Wed, 8 Sep 2010 21:18:24 -0500 (CDT) From: ac9s@mchsi.com Subject: [TowerTalk] Antenna Swittch - Grounded or Open Unused Contacts To: towertalk@contesting.com Message-ID: <174031409.13196512839
/archives//html/Towertalk/2010-09/msg00201.html (9,024 bytes)

155. [TowerTalk] Lightning Protection Question (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Tue, 14 Sep 2010 05:25:41 -0700
Gene, I didn't misread or overlook it at all. The function of an arrestor is to protect sensitive (and expensive) electronics from a strike. ALL IT DOES IS SHORT THE COAX. That remote switch is neith
/archives//html/Towertalk/2010-09/msg00305.html (11,355 bytes)

156. [TowerTalk] Cracked flange on bearing on Drum of HDX-689 (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Wed, 15 Sep 2010 06:01:52 -0700
OK.. I just discovered I have 2 x cracks on the flange portion of the bearing, that's on the end of the drum... the end that has the big chain drive on it. There is a bearing on each end of the drum.
/archives//html/Towertalk/2010-09/msg00331.html (7,579 bytes)

157. [TowerTalk] Skyhawk/truss clamp (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Wed, 15 Sep 2010 07:16:32 -0700
type clamp.....and also a mating SS lag bolt and nylock..for the assy that goes around the boom. DX eng has them in only 2 boom sizes..2" and also 3" . I used the exact same boom truss assy years ago
/archives//html/Towertalk/2010-09/msg00332.html (10,807 bytes)

158. [TowerTalk] free climbing a 1700`tower (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Thu, 16 Sep 2010 06:58:58 -0700
http://www.ebaumsworld.com/video/watch/81100181/ Somebody sent me this link..so it`s still around..freaks me right out. At least they got to use the elevator for the 1st 1600 feet. That last little b
/archives//html/Towertalk/2010-09/msg00377.html (6,955 bytes)

159. [TowerTalk] Newbee concrete rebar questions (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Fri, 17 Sep 2010 05:52:42 -0700
Personally, I think it is highly unlikely that significant corrosion would travel down the path of a thin wire. It certainly isn't a moisture issue, since moisture readily penetrates concrete anyway.
/archives//html/Towertalk/2010-09/msg00442.html (12,051 bytes)

160. [TowerTalk] Free climbing a 1700' tower (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Sun, 19 Sep 2010 05:08:25 -0700
I always free climb, then snap the belt when I get where I'm going. Been doing it for 20 years or more. There's just one rule -- hold on tight. But I'm 54 now, and suspect that in a few years I might
/archives//html/Towertalk/2010-09/msg00483.html (10,856 bytes)


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