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Total 284 documents matching your query.

1. [TowerTalk] repost/reply--digest (score: 1)
Author: Jim Jarvis <jimjarvis@optonline.net>
Date: Mon, 04 Dec 2006 21:55:07 -0500
How about you take 2 minutes, and trim it down to the bare minimum, and don't repost ANY of the digest! Failure to do so makes it unreadably long for the rest of us. And you KNOW we want to hear what
/archives//html/Towertalk/2006-12/msg00108.html (7,252 bytes)

2. [TowerTalk] sloping top hat (score: 1)
Author: Jim Jarvis <jimjarvis@optonline.net>
Date: Tue, 05 Dec 2006 21:25:04 -0500
WNEW AM, in NYC, had sloping top hats on its towers, made from the upper 10m or so of the top guyset. Worked fine for years, even in the nighttime directional array. My guess is, if the guys were at
/archives//html/Towertalk/2006-12/msg00138.html (6,616 bytes)

3. [TowerTalk] MOV surge protection (score: 1)
Author: Jim Jarvis <jimjarvis@optonline.net>
Date: Fri, 08 Dec 2006 17:46:33 -0500
It would seem to be a reasonable product differentiation strategy for Square D or someone to produce a distribution panel with replaceable surge protectors built in. I'm about to replace the 150A ser
/archives//html/Towertalk/2006-12/msg00234.html (7,251 bytes)

4. [TowerTalk] re; roof counterpoise (score: 1)
Author: Jim Jarvis <jimjarvis@optonline.net>
Date: Sat, 09 Dec 2006 12:34:11 -0500
Jason, I would think you would do ok with the mesh, although personally I would go with a few resonant radials, instead. The difficult part about having the counterpoise under the roof deck is gettin
/archives//html/Towertalk/2006-12/msg00236.html (7,262 bytes)

5. [TowerTalk] 160m inv. ell length (score: 1)
Author: Jim Jarvis <jimjarvis@optonline.net>
Date: Sun, 10 Dec 2006 12:09:06 -0500
On the topic of tuning an antenna by folding back the wire on itself, rather than cutting: Quoth KG0KP... Seems to me - This "folded back" discussion needs to specify BARE wire wrapped. If you are no
/archives//html/Towertalk/2006-12/msg00319.html (9,084 bytes)

6. Re: [TowerTalk] TowerTalk Digest, Vol 48, Issue 38 (score: 1)
Author: Jim Jarvis <jimjarvis@optonline.net>
Date: Sun, 10 Dec 2006 12:35:12 -0500
This thread came up a year or three ago. Evidently, the strobe lights on tall towers were causing dissorientation in migrating birds, and they were colliding with the towers. I think a fairly persuas
/archives//html/Towertalk/2006-12/msg00320.html (10,446 bytes)

7. [TowerTalk] Potential New FCC Tower Construction Threat (score: 1)
Author: Jim Jarvis <jimjarvis@optonline.net>
Date: Sun, 10 Dec 2006 13:37:36 -0500
Eric, TT: As I said in my earlier post on this topic, it was covered 2-3 years ago. The only definitive study which was produced indicated the impact of strobe lights on migrating bird flocks. Had yo
/archives//html/Towertalk/2006-12/msg00321.html (10,043 bytes)

8. [TowerTalk] Tall towers & ERP (score: 1)
Author: Jim Jarvis <jimjarvis@optonline.net>
Date: Mon, 11 Dec 2006 01:59:16 -0500
This thread seems to be setting in early, this year. Usually it's much closer to Dayton time. heh. quoth KK8ZZ: The mechanisms involved in migration by various species remain poorly understood, wheth
/archives//html/Towertalk/2006-12/msg00322.html (7,834 bytes)

9. Re: [TowerTalk] coax seal (score: 1)
Author: Jim Jarvis <jimjarvis@optonline.net>
Date: Wed, 13 Dec 2006 21:03:12 -0500
This stuff is insidious. There is no evidence that it results in a superior wx seal to two layers of scotch 33 by themselves. At least, none that I've seen, and no empirical evidence in its favor. In
/archives//html/Towertalk/2006-12/msg00466.html (7,311 bytes)

10. [TowerTalk] CW Guying (score: 1)
Author: Jim Jarvis <jimjarvis@optonline.net>
Date: Sat, 16 Dec 2006 12:57:02 -0500
Folks, I know the CW issue is traumatic for some. I see it as a non-issue. Either way, it doesn't belong here. Let's either put some guy wires on the topic, or take it off the towertalk reflector, ok
/archives//html/Towertalk/2006-12/msg00617.html (6,914 bytes)

11. Re: [TowerTalk] K9AY loops-- phased (score: 1)
Author: Jim Jarvis <jimjarvis@optonline.net>
Date: Tue, 19 Dec 2006 08:02:40 -0500
Joe, SP9P's report on the sp3key quad-phased K9AY loops is interesting, and prompts questions. 1) Has anyone modelled this? What is the resulting pattern, in any one direction? 2) I would assume that
/archives//html/Towertalk/2006-12/msg00703.html (7,734 bytes)

12. [TowerTalk] banging crankup towers (score: 1)
Author: Jim Jarvis <jimjarvis@optonline.net>
Date: Mon, 01 Jan 2007 12:45:47 -0500
Rick, TT: Although I don't have experience with this particular tower, I HAVE had a couple of tubular crankups, and a 45G foldover, all of which were house bracketed. Where there is structural motion
/archives//html/Towertalk/2007-01/msg00012.html (7,665 bytes)

13. [TowerTalk] grounding coax shields (score: 1)
Author: Jim Jarvis <jimjarvis@optonline.net>
Date: Thu, 04 Jan 2007 12:40:16 -0500
Actually, Jerry, the real reason for it is to isolate the antennas from each other...more than to protect the coax from lightning discharge. In a direct strike, you can pretty much kiss anything on t
/archives//html/Towertalk/2007-01/msg00151.html (7,616 bytes)

14. [TowerTalk] stacking steppIRs (score: 1)
Author: Jim Jarvis <jimjarvis@optonline.net>
Date: Sat, 10 Mar 2007 11:54:30 -0500
This is a tad late, but I've been away. To summarize what I saw so far on this topic... The original comment from 3830: The stacks on 20/15/10 were awesome. Stations often told us we were the loudest
/archives//html/Towertalk/2007-03/msg00149.html (8,242 bytes)

15. [TowerTalk] current imbalance on 450 ohm line (score: 1)
Author: Jim Jarvis <jimjarvis@optonline.net>
Date: Fri, 16 Mar 2007 04:17:25 -0400
I sent a direct response to Garry on this, but apparently mangled the address, and it eventually bounced. Let me try again, this time taking into account the other comments: Since the real complaint
/archives//html/Towertalk/2007-03/msg00267.html (8,770 bytes)

16. [TowerTalk] rohn 25 & stacking (score: 1)
Author: Jim Jarvis <jimjarvis@optonline.net>
Date: Tue, 20 Mar 2007 16:25:34 -0400
Quoth Stew: FWIW, one of the the locals (K3WW) has a stack of Skyhawks at 30/60/90 and they work really well. 73, Stew K3ND "One of the Locals" hardly does Chas, K3WW, justice. The man has done 50+ c
/archives//html/Towertalk/2007-03/msg00397.html (7,375 bytes)

17. [TowerTalk] very large antenna farm puzzler (score: 1)
Author: Jim Jarvis <jimjarvis@optonline.net>
Date: Sun, 01 Apr 2007 16:05:18 -0400
LPL posed the challenge....a much more interesting question than the usual pre-dayton, pre-spring silly-season discussion of wenches and radials. :) I could be wrong, but the site looks like it might
/archives//html/Towertalk/2007-04/msg00012.html (7,507 bytes)

18. [TowerTalk] low TOA on 160 verticals (score: 1)
Author: Jim Jarvis <jimjarvis@optonline.net>
Date: Tue, 03 Apr 2007 16:49:38 -0400
At the W2GD 160m contest site, the former WCC coastal marine site, in West Creek, NJ... we had an inverted Ell as the 'mult' station antenna. It was modelled by a very bright guy...and we changed to
/archives//html/Towertalk/2007-04/msg00080.html (7,586 bytes)

19. [TowerTalk] To radial, or not to radial, that is the question... (score: 1)
Author: Jim Jarvis <jimjarvis@optonline.net>
Date: Tue, 03 Apr 2007 16:59:21 -0400
Whether 'tis nobler to suffer the slings and arrows of outrageous radial debate, or by opposing, to end it. ... sorry, the devil made me do it. An empirical report: 7 MHz 1/4 wave GP, feedpoint @ 50'
/archives//html/Towertalk/2007-04/msg00081.html (7,804 bytes)

20. [TowerTalk] bracketed 45G (score: 1)
Author: Jim Jarvis <jimjarvis@optonline.net>
Date: Wed, 04 Apr 2007 09:09:50 -0400
Bob, The Rohn catalog/handbook detail for a bracketed antenna doesn't tell the whole story. At my old place in VT, I had 50' of 45G house bracketed, with a T8 log periodic and an R7000 vertical on to
/archives//html/Towertalk/2007-04/msg00100.html (7,746 bytes)

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