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References: [ +from:Walter.Carrington@umassmed.edu: 14 ]

Total 14 documents matching your query.

1. [TowerTalk] Temporary mast/tower --Rohn pushup mast? (score: 1)
Author: "Carrington, Walter" <Walter.Carrington@umassmed.edu>
Date: Thu, 20 Nov 2003 10:35:04 -0500
Will a 30' Rohn pushup mast handle a 2 meter beam and small rotator? Beam is a CC17B2, 31 feet long, 15 lb., 3.9 square feet wind area. What if I reduce it's height: 25' ?? The location is very windy
/archives//html/Towertalk/2003-11/msg00497.html (7,544 bytes)

2. [TowerTalk] RE: Antenna Separation (score: 1)
Author: "Carrington, Walter" <Walter.Carrington@umassmed.edu>
Date: Tue, 15 Jun 2004 21:10:24 -0400
One way to approach this is to look at what successful VHF contest rovers do. They place the antennas very close to each other sometimes inches. www.qsl.net/n9rla <http://www.qsl.net/n9rla> has pict
/archives//html/Towertalk/2004-06/msg00362.html (7,721 bytes)

3. [TowerTalk] Mounting rotor on 25ag2 top section? (score: 1)
Author: "Carrington, Walter" <Walter.Carrington@umassmed.edu>
Date: Fri, 3 Dec 2004 17:16:00 -0500
I have a Rohn 25ag2 top section (used); this is the tapered top section that has a single vertical tube at the top. It appears that the way the rotor and mast were mounted was rotor on a plate inside
/archives//html/Towertalk/2004-12/msg00052.html (8,457 bytes)

4. [TowerTalk] 2" Boom Clamp (score: 1)
Author: "Carrington, Walter" <Walter.Carrington@umassmed.edu>
Date: Thu, 13 Oct 2005 17:33:10 -0400
Jake, K9WN, was looking for a boom splice. I think this is it (mast clamp). http://www.penninger.com/prod01.htm W9IIX has something similar: MC-1 mast coupler: http://w9iix.com/ii00012.htm (not recom
/archives//html/Towertalk/2005-10/msg00500.html (7,365 bytes)

5. [TowerTalk] Advances in Antennas [was Building Antennas] (score: 1)
Author: "Carrington, Walter" <Walter.Carrington@umassmed.edu>
Date: Sun, 15 Jan 2006 21:13:14 -0500
From the perspective of one who has come back into the VHF game after almost 40 years off the air: Many VHF yagis of old turned out to have much less gain than people thought. Computer modeling has m
/archives//html/Towertalk/2006-01/msg00298.html (8,659 bytes)

6. Re: [TowerTalk] screw anchors (score: 1)
Author: "Carrington, Walter" <Walter.Carrington@umassmed.edu>
Date: Mon, 16 Jan 2006 11:36:08 -0500
In winter in MA (wind chill -30 last night), my screw anchors will hold any tower up till the steel fails. When the ground thaws in the spring it becomes much less secure. The screw anchor failure I
/archives//html/Towertalk/2006-01/msg00328.html (7,368 bytes)

7. [TowerTalk] Advances in Antennas [was Building Antennas] (score: 1)
Author: "Carrington, Walter" <Walter.Carrington@umassmed.edu>
Date: Mon, 16 Jan 2006 13:00:16 -0500
What has been said so far doesn't give much help to Bob, AD5VJ, in actually designing his antenna. First, if anything I say is contradicted by GM3SEK, L. Cebik, or many others, listen to them! :) Sec
/archives//html/Towertalk/2006-01/msg00333.html (8,714 bytes)

8. Re: [TowerTalk] Screw Anchors (soil conditions) (score: 1)
Author: "Carrington, Walter" <Walter.Carrington@umassmed.edu>
Date: Tue, 17 Jan 2006 21:39:45 -0500
The effectiveness of screw anchors depends on soil conditions, which I know little about. But there are people who do. I've seen maps of soil conditions of my hometown; ask at your town hall, county
/archives//html/Towertalk/2006-01/msg00368.html (7,136 bytes)

9. [TowerTalk] what winch to use for a 40 ft tower (score: 1)
Author: "Carrington, Walter" <Walter.Carrington@umassmed.edu>
Date: Wed, 25 Jan 2006 21:02:39 -0500
Harbor Freight: * Load capacity: 2000 lbs. * Cable:3/16'' x25 ft. * Gearbox: worm gear * Shipping weight: 11.6 lbs. ITEM 5798-1VGA $29.99 I have one for the same application but haven't put anything
/archives//html/Towertalk/2006-01/msg00526.html (7,726 bytes)

10. [TowerTalk] Tower Restrictions (score: 1)
Author: "Carrington, Walter" <Walter.Carrington@umassmed.edu>
Date: Mon, 20 Aug 2007 20:50:03 -0400
Hi Jose, It looks to me like you can go at least to 65'. If it is reasonable to go higher than that on your lot, you may be able to get a variance. "Seems the city has a 35 foot limit on towers and a
/archives//html/Towertalk/2007-08/msg00557.html (9,692 bytes)

11. [TowerTalk] Vertical in the swamp (score: 1)
Author: "Carrington, Walter" <Walter.Carrington@umassmed.edu>
Date: Tue, 13 May 2008 11:18:40 -0400
Is swamp water conductive? Fresh water swamps have a lot of stuff suspended or dissolved in the water. The conductivity might be much higher than pure water. A quick google: Great Salt Lake = 158,000
/archives//html/Towertalk/2008-05/msg00248.html (8,760 bytes)

12. [TowerTalk] BIG 6m antenna (score: 1)
Author: "Carrington, Walter" <Walter.Carrington@umassmed.edu>
Date: Fri, 30 May 2008 08:58:14 -0400
There are interesting plans for low noise VHF yagis by YU7EF at http://www.yu7ef.com/ In particular there is a 15.5 meter long 10 element 6m yagi: http://www.yu7ef.com/ef0610.htm (electrical dimensio
/archives//html/Towertalk/2008-05/msg00564.html (7,565 bytes)

13. Re: [TowerTalk] Shortening an M2 6M5-X (score: 1)
Author: "Carrington, Walter" <Walter.Carrington@umassmed.edu>
Date: Thu, 5 Jun 2008 22:02:11 -0400
I've just done something similar with my M2 6m7jhv 7 element 6 meter beam. For a temporary setup I'm using just 4 of the 7 elements. The SWR was terrible and I had given up until I remembered that my
/archives//html/Towertalk/2008-06/msg00115.html (7,291 bytes)

14. [TowerTalk] Pins for Yaesu rotor box connector. (score: 1)
Author: "Carrington, Walter" <Walter.Carrington@umassmed.edu>
Date: Fri, 13 Jun 2008 00:20:19 -0400
Trying to put the cable for my Yaesu G800SA rotor together, I find that I have lost 2 of the pins for the plug that goes into the rotor control box. Does anybody know if these pins are some standard
/archives//html/Towertalk/2008-06/msg00274.html (6,976 bytes)

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