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References: [ +from:jim.thom@telus.net: 1315 ]

Total 1315 documents matching your query.

121. [TowerTalk] Gas Tube protection for remote antenna switches; (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Mon, 26 Jul 2010 05:46:46 -0700
Yesterday we had a severe thunderstorm episode, with significant cloud-to-ground lightning nearby. All my coax and control lines were disconnected, but when one particularly close strike occurred, an
/archives//html/Towertalk/2010-07/msg00564.html (9,851 bytes)

122. [TowerTalk] Gas Tube protection for remote antenna switch's (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Tue, 27 Jul 2010 06:32:53 -0700
Repeat after me -- LIGHTNING IS NOT A DC EVENT, IT IS AN RF EVENT. Write it 100 times on the blackboard! :) That choke only discharges DC. 73, Jim K9YC made that comment. floating.. and not grnded [l
/archives//html/Towertalk/2010-07/msg00605.html (9,288 bytes)

123. [TowerTalk] DX eng (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Tue, 27 Jul 2010 07:30:35 -0700
I don?t think it is a good idea to use saddles with teeth. Those will saw through the tubing on the long run. they won't bite into the mast anyway ! You have the same problem with the fubar mast clam
/archives//html/Towertalk/2010-07/msg00606.html (13,649 bytes)

124. [TowerTalk] Sources for 2 and 3 inch boom material (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Fri, 30 Jul 2010 01:26:19 -0700
Anyone know of any sources for aluminum boom material (2 and 3 inch) in the southeast US, specifically Florida? Bill KH7XS 2"-3"-4" diam.. and all of em came in 20'-30'-40' length's. Back then, I wan
/archives//html/Towertalk/2010-07/msg00691.html (15,959 bytes)

125. [TowerTalk] shack wiring (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Fri, 30 Jul 2010 02:04:39 -0700
Another suggestion. run 20A circuits (#12) for anything that may get a lot of electronic stuff plugged in, with a dedicated neutral for each circuit. For long runs, pull in #10. If you do the math, y
/archives//html/Towertalk/2010-07/msg00693.html (10,776 bytes)

126. [TowerTalk] surge protectors (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Fri, 30 Jul 2010 04:05:08 -0700
Hi Bill, Will be looking forward to your return. I purchased mine through Florida Power. They mount it behind the electric meter. It has two led's to monitor the line which you can see. If at any poi
/archives//html/Towertalk/2010-07/msg00695.html (14,482 bytes)

127. [TowerTalk] LMR-600 UHF-males (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Sat, 31 Jul 2010 07:07:18 -0700
Some observations: Another observation: One contributor questions what feed thrus are available for LMR 600 size cable. LMR 600 can be terminated with UHF, N's or DIN males and suitable female/female
/archives//html/Towertalk/2010-07/msg00729.html (8,880 bytes)

128. [TowerTalk] cutting galvanized tower legs (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Sun, 1 Aug 2010 00:00:56 -0700
pole. The 4"/5" cut off wheels will fit an angle grinder... but were not deep enough to cut the 1/2" bolts. [Previous owner had used 1/2" bolts to bolt 2" angle steel to the sides of 4" OD pipe... an
/archives//html/Towertalk/2010-08/msg00000.html (8,734 bytes)

129. [TowerTalk] Fwd: shack wiring (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Mon, 2 Aug 2010 04:16:50 -0700
In a 3-phase system, any harmonic whose number is divisible by three will ADD in the neutral rather than cancel. That's because the three phases are displaced by 120 degrees at the fundamental, and t
/archives//html/Towertalk/2010-08/msg00026.html (11,238 bytes)

130. [TowerTalk] Vertical antennas and lightning (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Mon, 2 Aug 2010 05:06:01 -0700
Unfortunately in this case the 'bleeding' when there is a charged cloud over head is putting charge ONTO the antenna from the ground to equalize it with the rest of the charge being attracted to the
/archives//html/Towertalk/2010-08/msg00027.html (12,517 bytes)

131. [TowerTalk] shack wiring (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Mon, 2 Aug 2010 07:24:05 -0700
Yes, you are right, a three phase system aggravates the problem but it is also present on on split phase feed. Worst case probably never happen, but my house in Brooklyn receives its power from a gig
/archives//html/Towertalk/2010-08/msg00033.html (8,671 bytes)

132. [TowerTalk] Fwd: shack wiring (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Mon, 2 Aug 2010 07:54:39 -0700
The neutral for premise distribution is created at the utility transformer secondary. Speaking of electrical distribution and use of neutrals, this evolution of plant step-down architecture has alway
/archives//html/Towertalk/2010-08/msg00036.html (12,900 bytes)

133. Re: [TowerTalk] Fwd: shack wiring (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Mon, 2 Aug 2010 16:51:29 -0700
town is all on poles. My drop wire is a mid span drop...between 2 x poles. Since that neutral goes to all 9 x homes.. and the neutral [ CT of xfmr sec] is also bonded to the MGN, via a short loop on
/archives//html/Towertalk/2010-08/msg00062.html (17,789 bytes)

134. [TowerTalk] RFS- 7/8" Cell flex- ultraflexible heliax..with Corrugated AL outer conductor. (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Tue, 3 Aug 2010 05:33:12 -0700
Anybody know what the typ price of this stuff is ?? RFS makes 'ultraflexible' 7/8" heliax... using corrugated copper center conductor.. and a corrugated copper outer conductor. Their latest version u
/archives//html/Towertalk/2010-08/msg00067.html (7,858 bytes)

135. [TowerTalk] Fwd: shack wiring (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Tue, 3 Aug 2010 23:25:14 -0700
What happens to the other 8 homes mains voltage if you fire up that YU148? 73 Peter the same thing. Their answer was... "go ahead and burn it right off the pole" . Here in NA, we are being sold a bil
/archives//html/Towertalk/2010-08/msg00081.html (12,581 bytes)

136. [TowerTalk] TL-922 grid chokes (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Thu, 5 Aug 2010 07:45:18 -0700
The grid chokes in my TL-922 were replaced with 10 ohm resistors by the previous owner. The amp works fine except on 10 M where the resistors go up in smoke within a few seconds. This bring up severa
/archives//html/Towertalk/2010-08/msg00134.html (7,908 bytes)

137. [TowerTalk] Fall Harness-My Choice (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Fri, 13 Aug 2010 16:34:07 -0700
Better to be safe, I have tried several different brands and use the Elk River Tower harness with a spreader between the waist D rings and have a lanyard to attach for fall protection. If you want t
/archives//html/Towertalk/2010-08/msg00254.html (9,247 bytes)

138. [TowerTalk] Fall Harness-My Choice (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Sat, 14 Aug 2010 00:32:38 -0700
I have an AN Wireless HD-70 freestanding tower with the foot pegs ... slippery enough to require caution when wet, but not treacherous. I climb with a full body harness with two relatively short safe
/archives//html/Towertalk/2010-08/msg00263.html (9,531 bytes)

139. [TowerTalk] Fall Harness-My Choice (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Sat, 14 Aug 2010 05:46:00 -0700
My hesitation in buying the safety cable was simply that I didn't want to trust my life to a spring gripping system I suspected I wouldn't be able to see (I've never seen one in person so I wasn't ce
/archives//html/Towertalk/2010-08/msg00268.html (13,607 bytes)

140. [TowerTalk] Protecting a Tower Relay Box (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Wed, 18 Aug 2010 09:14:25 -0700
I'll add my comments which agree with the others advising you NOT to mount the relay box 80ft up the tower. I had to climb my tower once at dusk during the CQWW CW contest to swap out a failed relay
/archives//html/Towertalk/2010-08/msg00429.html (8,800 bytes)


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