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1. [TowerTalk] Calculating dead weight stress on mast when tower iscranked over (score: 1): Author: <k4zrj@bellsouth.net>; Date: Wed, 31 May 2006 16:24:25 -0400; To all the antenna & mast engineers out there, I have a 55' crankup / tiltover tower that uses a 24' aluminum mast 6061-T6511 2" OD .25" wall. My question is this: does anyone have a formula for calc; /archives//html/Towertalk/2006-05/msg00493.html (8,172 bytes)
2. [TowerTalk] Crankup tower gearbox lube question (score: 1): Author: <k4zrj@bellsouth.net>; Date: Mon, 7 Aug 2006 11:00:20 -0400; I have an old Tri-Ex HZE-354 motorized crankup tower with a 40:1 ratio gearbox turned by a 1 HP motor. When I bought the tower, the gearbox was empty - no oil or grease of any kind inside - I guess f; /archives//html/Towertalk/2006-08/msg00171.html (7,964 bytes)
3. Re: [TowerTalk] Crankup tower gearbox lube question (score: 1): Author: <k4zrj@bellsouth.net>; Date: Tue, 8 Aug 2006 10:15:24 -0400; Thanks for the replies - looks like SAE 90 lube oil is the right thing to use. Charles _______________________________________________ _______________________________________________ TowerTalk mailin; /archives//html/Towertalk/2006-08/msg00190.html (8,759 bytes)
4. Re: [TowerTalk] HyGain BN style balun question. (score: 1): Author: Charles Johnson <k4zrj@bellsouth.net>; Date: Tue, 22 Aug 2006 16:21:26 -0400; The BN-86 and BN-4000 baluns are simply a piece of coax with the center going to one attachment point and the shield to the other. It should show infinite resistance between the two attachment points; /archives//html/Towertalk/2006-08/msg00709.html (9,406 bytes)
5. Re: [TowerTalk] HyGain BN style balun question. (score: 1): Author: Charles Johnson <k4zrj@bellsouth.net>; Date: Tue, 22 Aug 2006 16:54:11 -0400; I should have added that the BN-4000B does use teflon coax RGU-303 ? (hard to read the markings - its about the same size as RG-58/U) and 45 ferrite beads. 73, Charles, K4ZRJ ________________________; /archives//html/Towertalk/2006-08/msg00714.html (8,807 bytes)

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