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Total 80 documents matching your query.

21. [TowerTalk] Towable towers available from the government (score: 1)
Author: "Doug Ronald" <doug@dougronald.com>
Date: Wed, 14 Aug 2013 10:41:17 -0700
One small hitch (pun noted), they need to be destroyed before you can haul them away. http://www.govliquidation.com/auction/view?id=6478940 <http://www.govliquidation.com/auction/view?id=6478940&tid=
/archives//html/Towertalk/2013-08/msg00353.html (7,319 bytes)

22. Re: [TowerTalk] Towable towers available from the government (score: 1)
Author: "Doug Ronald" <doug@dougronald.com>
Date: Thu, 15 Aug 2013 09:18:18 -0700
Here is clarification on the lot vs. item issue: Question: -- Event 9067 lot number 3900 says "Quantity in lot: 198000". When I bid, am I bidding on 198000 items each, or on the entire weight of 1980
/archives//html/Towertalk/2013-08/msg00388.html (11,158 bytes)

23. Re: [TowerTalk] hosting a commercial service on my tower (score: 1)
Author: "Doug Ronald" <doug@dougronald.com>
Date: Wed, 22 Jan 2014 12:27:54 -0800
Relative to the RFI issue, I have a comment. On my rural property, I had no access to any Internet connection other than the poor performance satellite services. I found a small (four persons from wh
/archives//html/Towertalk/2014-01/msg00338.html (12,947 bytes)

24. Re: [TowerTalk] AB-252, AB-253, AB-254, AB-255, AB-256, AB-257 aluminum military masts info wanted (score: 1)
Author: "Doug Ronald" <doug@dougronald.com>
Date: Mon, 7 Jul 2014 10:22:49 -0700
I have many AB-621G portable tower kits I purchased government surplus which I tried to sell a few years ago for scrap aluminum prices. Understandably, no one wanted to foot the shipping. They extend
/archives//html/Towertalk/2014-07/msg00062.html (9,302 bytes)

25. [TowerTalk] US Tower on trailer (score: 1)
Author: "Doug Ronald" <doug@dougronald.com>
Date: Tue, 8 Jul 2014 11:42:39 -0700
The government finally decided to sell a useful tower rather than scrap it. Check it out here: http://www.govliquidation.com/auction/view?auctionId=7852760 <http://www.govliquidation.com/auction/view
/archives//html/Towertalk/2014-07/msg00069.html (7,395 bytes)

26. [TowerTalk] Looking for tower worker(s) (score: 1)
Author: "Doug Ronald" <doug@dougronald.com>
Date: Thu, 14 Aug 2014 10:27:13 -0700
I'm in Northern California, north of San Francisco, and am looking for a worker or two who are not afraid of heights. My need is immediate, and I'm not after a volunteer - I'll pay! Thanks for any su
/archives//html/Towertalk/2014-08/msg00277.html (6,665 bytes)

27. [TowerTalk] microwave portable tower (score: 1)
Author: "Doug Ronald" <doug@dougronald.com>
Date: Thu, 28 Aug 2014 11:14:37 -0700
This might be handy for field day. http://www.govliquidation.com/auction/view?auctionId=8173204 <http://www.govliquidation.com/auction/view?auctionId=8173204&convertTo=USD> &convertTo=USD -Doug, AE6S
/archives//html/Towertalk/2014-08/msg00526.html (7,017 bytes)

28. Re: [TowerTalk] keeping the bands quiet: 12 KW PV array (score: 1)
Author: "Doug Ronald" <doug@dougronald.com>
Date: Mon, 27 Oct 2014 13:06:11 -0700
After completing my 6.6 kW solar plant, and being initially bitterly disappointed with the HF noise it generated, is to recommend only the use of equipment that has an FCC Part 15 B rating. Also, if
/archives//html/Towertalk/2014-10/msg00378.html (9,479 bytes)

29. Re: [TowerTalk] AB-621/G Military Mast (score: 1)
Author: "Doug Ronald" <doug@dougronald.com>
Date: Thu, 3 Sep 2015 17:42:05 -0700
I have 11 or 12 of these mast kits. The 8' piece is the elevator, and I can man handle it pretty easily. The heaviest of the three pieces is a case of the tubes, which I can maneuver around without e
/archives//html/Towertalk/2015-09/msg00039.html (10,260 bytes)

30. [TowerTalk] Expected VSWR of antenna near the ground (score: 1)
Author: "Doug Ronald" <doug@dougronald.com>
Date: Fri, 25 Sep 2015 18:16:17 -0700
I have assembled my 19 element LPDA with the front 12 elements about 3 feet off the ground and parallel to the ground. The back elements are laying on the ground, but electrically connected in the us
/archives//html/Towertalk/2015-09/msg00279.html (8,032 bytes)

31. Re: [TowerTalk] Expected VSWR of antenna near the ground (score: 1)
Author: "Doug Ronald" <doug@dougronald.com>
Date: Sat, 26 Sep 2015 10:21:31 -0700
If I were to get the nose to point up higher, maybe 45 degrees, wouldn't I expect the VSWR to straighten out in the higher frequencies? As I understand the LPDA, as the frequency increases, the short
/archives//html/Towertalk/2015-09/msg00286.html (12,126 bytes)

32. Re: [TowerTalk] Expected VSWR of antenna near the ground (score: 1)
Author: "Doug Ronald" <doug@dougronald.com>
Date: Mon, 28 Sep 2015 12:42:24 -0700
Well, okay, I'm convinced, thanks to everyone's advice, that I cannot expect a VSWR sweep to yield anything meaningful with the antenna on the ground. So I've done everything I can on the ground to e
/archives//html/Towertalk/2015-09/msg00294.html (12,346 bytes)

33. Re: [TowerTalk] Expected VSWR of antenna near the ground (score: 1)
Author: "Doug Ronald" <doug@dougronald.com>
Date: Mon, 28 Sep 2015 14:21:20 -0700
This is really helpful. When I did the plot with the antenna on the ground, all the dips below 5:1 VSWR were below 10 MHz. Then, after 10 MHz, the VSWR saturated at the graph limits of 5:1. The compl
/archives//html/Towertalk/2015-09/msg00297.html (10,559 bytes)

34. Re: [TowerTalk] Expected VSWR of antenna near the ground (score: 1)
Author: "Doug Ronald" <doug@dougronald.com>
Date: Mon, 28 Sep 2015 14:33:48 -0700
The boom is actually a structural truss, not involved with feeding the dipole elements. All the dipole elements are fed from a linearly tapered coaxial transmission line transformer, the details of w
/archives//html/Towertalk/2015-09/msg00298.html (15,590 bytes)

35. Re: [TowerTalk] Expected VSWR of antenna near the ground (score: 1)
Author: "Doug Ronald" <doug@dougronald.com>
Date: Mon, 28 Sep 2015 14:49:18 -0700
Bingo! Itīs probably a LP1005 http://antennas.usantennaproducts.com/item/log-periodic-antennas/-lp-1005aa25-kw-rotatable-hf-log-periodic-antenna/lp-1005aa 73 Peter Make sure the booms are electricall
/archives//html/Towertalk/2015-09/msg00300.html (15,228 bytes)

36. Re: [TowerTalk] Expected VSWR of antenna near the ground (score: 1)
Author: "Doug Ronald" <doug@dougronald.com>
Date: Mon, 28 Sep 2015 15:28:31 -0700
I e-mailed with VE6FI some time ago after searching to see who else may have one of these antenna systems. He mentioned that they had to add a friction break at the twin tower base to keep the antenn
/archives//html/Towertalk/2015-09/msg00303.html (18,058 bytes)

37. Re: [TowerTalk] Expected VSWR of antenna near the ground (score: 1)
Author: "Doug Ronald" <doug@dougronald.com>
Date: Mon, 28 Sep 2015 15:29:44 -0700
Its part of the military AS-3515/GRC system which comes with 2 side-by-side towers, with the mast going up from the ground between the towers. The rotor which sits in a saddle between the towers supp
/archives//html/Towertalk/2015-09/msg00304.html (17,002 bytes)

38. Re: [TowerTalk] Wind and the antenna (score: 1)
Author: "Doug Ronald" <doug@dougronald.com>
Date: Wed, 6 Jan 2016 12:54:03 -0800
When the shear pin on my LPDA breaks in high wind, and thus can freewheel, it likes the back end to the wind. Kind-of surprised me, but that's what it does... -Doug W6DSR Which is why you want the an
/archives//html/Towertalk/2016-01/msg00091.html (10,068 bytes)

39. Re: [TowerTalk] "Magic" length from tower to first insulator (score: 1)
Author: "Doug Ronald" <doug@dougronald.com>
Date: Wed, 16 Mar 2016 10:27:20 -0700
My commercial LPDA uses guy lengths of 8', 10', 10', 10', then 70' or so of remaining guy to the guy anchors measuring from the tower top. I think the first 8' was determined by the Big Grips' length
/archives//html/Towertalk/2016-03/msg00280.html (9,664 bytes)

40. Re: [TowerTalk] AES SK (score: 1)
Author: "Doug Ronald" <doug@dougronald.com>
Date: Thu, 7 Jul 2016 14:15:09 -0700
Here's another off-topic opinion piece - My equipment is homemade, some at the component level, some at the board level, and some at the module level. I have finished the receive side, and am working
/archives//html/Towertalk/2016-07/msg00158.html (8,925 bytes)


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