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Total 35 documents matching your query.

1. [TowerTalk] For Sale: New Tower, Similar to Heavy Duty AB-105 (score: 1)
Author: "Frank Donovan" <donovanf@erols.com>
Date: Sat, 10 Jul 2004 23:48:17 -0400
This is an exceptionally rare find, perhaps never to be found ever again since it was last manufactured nearly 40 years ago. This new (old stock) Granger heavy duty 24 inch face-width tower is still
/archives//html/Towertalk/2004-07/msg00372.html (8,189 bytes)

2. Re: [TowerTalk] AB-105 Diagonal (score: 1)
Author: "Frank Donovan" <donovanf@erols.com>
Date: Thu, 5 Aug 2004 19:49:02 -0400
Hank, There were three versions of the AB-105 tower, the most recent production was AB-105C. Diagonals for AB-105C were constructed from 1 1/2" by 3/32" steel strip, stamped into a 90 degree angle, e
/archives//html/Towertalk/2004-08/msg00129.html (10,196 bytes)

3. Re: [TowerTalk] AB-105 Diagonal (score: 1)
Author: "Frank Donovan" <donovanf@erols.com>
Date: Thu, 5 Aug 2004 21:20:12 -0400
The entire AB-105C/FRC Technical Manual is available online in PDF form at: https://www.logsa.army.mil/etms/data/A/028953.pdf 73! Frank W3LPL donovanf@erols.com the any ______________________________
/archives//html/Towertalk/2004-08/msg00131.html (11,891 bytes)

4. Re: [TowerTalk] cable clamps/wraplock etc (score: 1)
Author: "Frank Donovan" <donovanf@erols.com>
Date: Thu, 12 Aug 2004 19:47:59 -0400
Of course, stranded wire can't work! Whoever quoted me wasn't listening carefully, has a fading memory or both... The proper message is: Many professional antenna installers use #14 THHN solid copper
/archives//html/Towertalk/2004-08/msg00236.html (9,541 bytes)

5. Re: [TowerTalk] Stacking (score: 1)
Author: "Frank Donovan" <donovanf@erols.com>
Date: Sat, 4 Dec 2004 09:05:46 -0500
Hi Mike, I'd expect the interaction between the 3 element 20M monobander and the log to be severe unless you can space the antennas at least 30 feet vertically. Both antennas would be severely degrad
/archives//html/Towertalk/2004-12/msg00064.html (10,240 bytes)

6. [TowerTalk] T-match vs Gamma-Match Trade-off (score: 1)
Author: "Frank Donovan" <donovanf@erols.com>
Date: Sun, 5 Dec 2004 07:07:34 -0500
I've used gamma-matched Yagis for many years. I still have three gamma-matched 20 meter Yagis and my remaining 18 Yagis are T-match fed. All have been trouble-free for over 10 years. Over a fifteen y
/archives//html/Towertalk/2004-12/msg00078.html (14,155 bytes)

7. Re: [TowerTalk] WTB: Rohn 25G hardware (score: 1)
Author: "donovanf@erols.com" <donovanf@erols.com>
Date: Mon, 27 Dec 2004 11:43:53 -0500
Jim, You should be aware that Guy-Grips and Big-Grips are not the same product! The manufacturer recommends Big-Grips for towers. 73! Frank W3LPL For safety and long life [the towers and yours] you w
/archives//html/Towertalk/2004-12/msg00518.html (9,103 bytes)

8. [TowerTalk] Usage of Big-Grips on Tower Guys (score: 1)
Author: "Frank Donovan" <donovanf@erols.com>
Date: Mon, 3 Jan 2005 21:31:50 -0500
Regarding the misguided recommendation posted last week that Guy-Grips be used on tower guy wires, the Preformed Line Products web site specifically recommends use of Big-Grip preforms on guy wires u
/archives//html/Towertalk/2005-01/msg00058.html (8,178 bytes)

9. Re: [TowerTalk] KLM Antenna Request (score: 1)
Author: "Frank Donovan" <donovanf@erols.com>
Date: Tue, 4 Jan 2005 20:44:12 -0500
Keith, This is your friend's lucky day! A few days ago a friend deposited on my doorstep a large box of components from his old KLM monobanders and tribanders. Right on top is the exact part he's loo
/archives//html/Towertalk/2005-01/msg00074.html (8,751 bytes)

10. Re: [TowerTalk] Galvanizing ChromeMoly? (score: 1)
Author: "Frank Donovan" <donovanf@erols.com>
Date: Tue, 4 Jan 2005 20:53:26 -0500
Doc, For comparitive purposes, Dillsburg Aeroplane Works in Dillsburg, PA sells 2" od x 0.188" wall 4130 Cr-Mo tubing for $9.00 per foot. This is raw Cr-Mo steel, not galvanized. If you do not galvan
/archives//html/Towertalk/2005-01/msg00076.html (9,667 bytes)

11. Re: [TowerTalk] Any 65g tower out there for sale? (score: 1)
Author: "Frank Donovan" <donovanf@erols.com>
Date: Fri, 14 Jan 2005 17:46:33 -0500
Jack, I do not have any Rohn 65 for sale; however, I do have for sale a large quantity of new, heavy duty, 24 inch face-width tower manufactured by Granger Associates (Model 789-4). The strength of M
/archives//html/Towertalk/2005-01/msg00506.html (8,777 bytes)

12. Re: [TowerTalk] Station Ground (score: 1)
Author: "Frank Donovan" <donovanf@erols.com>
Date: Fri, 14 Jan 2005 18:22:52 -0500
Station ground bus bars are an obsolete grounding practice, modern design practices provide far superior AC power safety and lightning protection. Grounding serves several purposes, including: - elec
/archives//html/Towertalk/2005-01/msg00512.html (9,036 bytes)

13. Re: [TowerTalk] Station Ground (score: 1)
Author: "Frank Donovan" <donovanf@erols.com>
Date: Fri, 14 Jan 2005 17:40:50 -0500
Station ground bus bars are an obsolete grounding practice, modern grounding design practices provide far superior AC power safety and lightning protection. Grounding serves several purposes, includi
/archives//html/Towertalk/2005-01/msg00530.html (12,390 bytes)

14. Re: [TowerTalk] Station Ground (score: 1)
Author: "Frank Donovan" <donovanf@erols.com>
Date: Fri, 14 Jan 2005 20:48:13 -0500
You should focus your efforts on designing and constructing a low impedance grounding window at the location where your cables enter your home. All cables entering your home should be bonded to the g
/archives//html/Towertalk/2005-01/msg00531.html (12,590 bytes)

15. [TowerTalk] Ice on towers (was Wires from a Freestanding Tower) (score: 1)
Author: "Frank Donovan" <donovanf@erols.com>
Date: Sat, 15 Jan 2005 11:20:02 -0500
I was very sorry to hear about the severe damage to N9RVs antennas in the recent ice storms that recently affected many parts of the U.S. I know Pat worked very hard to build his excellent station, a
/archives//html/Towertalk/2005-01/msg00562.html (9,882 bytes)

16. Re: [TowerTalk] unguyed heights for Rohn 65 etc.? (score: 1)
Author: "Frank Donovan" <donovanf@erols.com>
Date: Sat, 15 Jan 2005 12:38:25 -0500
Hi Rich, Don't forget that you must use a massive concrete base for a self-supporting tower. With the amount of land you have, it would be far cheaper and easier to use guys! 73! Frank W3LPL donovanf
/archives//html/Towertalk/2005-01/msg00564.html (11,608 bytes)

17. Re: [TowerTalk] Station Ground (score: 1)
Author: "Frank Donovan" <donovanf@erols.com>
Date: Sat, 15 Jan 2005 16:05:29 -0500
Several posts in this thread made reference to the use of braided bonding straps in grounding systems. One post even provided photographs that showed his use of braid in his station. Braid should nev
/archives//html/Towertalk/2005-01/msg00575.html (10,282 bytes)

18. Re: [TowerTalk] There's 'ground', and then there's 'ground' (score: 1)
Author: "Frank Donovan" <donovanf@erols.com>
Date: Sun, 16 Jan 2005 10:50:44 -0500
Hi Jim, Here's another one to add to your list: Discard all forms of "braided" cable. Braid is something a girl does to her hair. It is not a good RF ground and it's a terrible conductor for lightnin
/archives//html/Towertalk/2005-01/msg00600.html (11,157 bytes)

19. Re: [TowerTalk] There's 'ground', and then there's 'ground' (score: 1)
Author: "Frank Donovan" <donovanf@erols.com>
Date: Sun, 16 Jan 2005 11:34:46 -0500
Here's a clarification, pointed out by an attentive towertalkian: My previous e-mail was not intended to refer to cables that use a braided shield under a jacket. A tight jacket compresses the braid
/archives//html/Towertalk/2005-01/msg00601.html (8,486 bytes)

20. Re: [TowerTalk] Station Ground -- additional ground rods (score: 1)
Author: "Frank Donovan" <donovanf@erols.com>
Date: Sun, 16 Jan 2005 16:08:43 -0500
Alan, There's a very important reason for bonding multiple ground systems (for example, your AC entrance panel ground and your ham station single point ground) with low RF impedance conductors. You n
/archives//html/Towertalk/2005-01/msg00623.html (9,814 bytes)


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