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References: [ +from:frohro@wwc.edu: 38 ]

Total 38 documents matching your query.

21. Re: [TowerTalk] The best UV resistant 8 conductor rotor cable? (score: 1)
Author: Rob Frohne <frohro@wwc.edu>
Date: Thu, 22 Apr 2004 06:11:16 -0700
Thanks Phil, I suppose you are right that 15 years isn't bad, but I know it should be possible to do better, because the 9913 I installed with it, is still in good shape. Rob On Apr 22, 2004, at 3:18
/archives//html/Towertalk/2004-05/msg00072.html (9,793 bytes)

22. [TowerTalk] Brainstorming: A homebrew Steppir like beam.... (score: 1)
Author: Rob Frohne <frohro@wwc.edu>
Date: Thu, 22 Apr 2004 12:38:17 -0700
Hi All, As Bill (W5WVO) recently put it, "The vast majority of you seem to think the SteppIR yagi is the greatest thing since the discovery of the ionosphere! " At this time, I haven't been able to f
/archives//html/Towertalk/2004-05/msg00083.html (10,579 bytes)

23. Re: [TowerTalk] steppIR (score: 1)
Author: Rob Frohne <frohro@wwc.edu>
Date: Thu, 6 May 2004 07:48:34 -0700
Hi Jim, I'd like to disagree. :) On May 5, 2004, at 2:09 PM, Jim Jarvis wrote: Folks, In brainstorming how to 'make a steppIR cheaper'....you're misleading yourselves. Maybe, maybe not. You don't kno
/archives//html/Towertalk/2004-05/msg00113.html (11,175 bytes)

24. Re: [TowerTalk] SteppIR Redux (score: 1)
Author: Rob Frohne <frohro@wwc.edu>
Date: Fri, 7 May 2004 07:57:01 -0700
On May 6, 2004, at 4:38 PM, Joe Subich, K4IK wrote: Figure out how to make the elements of retractable tubing, so when not in use, they collapse down to 3 feet (each side) or whatever. This would red
/archives//html/Towertalk/2004-05/msg00135.html (9,859 bytes)

25. Re: [TowerTalk] Class 2 and Class 7 Poles (score: 1)
Author: Rob Frohne <frohro@wwc.edu>
Date: Mon, 17 May 2004 21:42:07 -0700
Hi All, Interesting topic. A few years ago, I tried to obtain a 120' phone pole new, and all the guys I talked to said it had been years since they had seen one even close to that size. One of my men
/archives//html/Towertalk/2004-05/msg00360.html (10,946 bytes)

26. Re: [TowerTalk] Homebrew freestanding mast (score: 1)
Author: Rob Frohne <frohro@wwc.edu>
Date: Wed, 28 Jul 2004 13:14:35 -0700
My email program didn't like the spaces in your URL. Here is a fixed one if anyone else has the same problems I did. http://www.iol.ie/~bravo/Well%20Casing%20Tower.htm Looks interesting. Is that what
/archives//html/Towertalk/2004-07/msg00846.html (10,908 bytes)

27. Re: [TowerTalk] Ham IV rotor (score: 1)
Author: Rob Frohne <frohro@wwc.edu>
Date: Mon, 30 Aug 2004 10:02:40 -0700
On Aug 30, 2004, at 9:46 AM, Tower (K8RI) wrote: Going to less likely The cable could have been pinched if the tower has been raised and lowered or it could have been pulled loosening one of the conn
/archives//html/Towertalk/2004-08/msg00669.html (11,321 bytes)

28. [TowerTalk] Wanted: Info on Tri-Ex THD series towers. (score: 1)
Author: Rob Frohne <frohro@wwc.edu>
Date: Sun, 6 Mar 2005 12:28:33 -0800
Hi, I have a THD-7122 (seven sections 122 feet extended) crank up tower and would like to know the recommended procedure for cranking it up and down. Does anyone have any information on that? Thanks,
/archives//html/Towertalk/2005-03/msg00149.html (6,946 bytes)

29. Re: [TowerTalk] Playing with my new VIA Analyst (long) (score: 1)
Author: Rob Frohne <frohro@wwc.edu>
Date: Fri, 11 Nov 2005 11:36:19 -0800
Hi Bob, I haven't been back to read the posts that directed you that you need 1/2 wavelength of coax to measure the correct VSWR, but it isn't true if you have any loss in your coax. The signal is at
/archives//html/Towertalk/2005-11/msg00352.html (12,721 bytes)

30. [TowerTalk] Any Antenna Experimenters Near Walla Walla, WA? (score: 1)
Author: Rob Frohne <frohro@wwc.edu>
Date: Wed, 11 Oct 2006 21:56:59 -0700
Hi, I'm wondering if there are any antenna experimenters near here who might be interested in going together to purchase a decent sized order of fiberglass poles from MaxGain Systems. The poles are c
/archives//html/Towertalk/2006-10/msg00352.html (7,649 bytes)

31. [TowerTalk] Prop Pitch Doesn't Turn (score: 1)
Author: Rob Frohne <frohro@wwc.edu>
Date: Mon, 12 Mar 2007 16:37:27 -0700
Hi, A few years ago I purchased a couple of what I believe are small prop pitch rotors. Now that I have a need for them, I am trying to figure out how to test them. One of them I was able to use some
/archives//html/Towertalk/2007-03/msg00184.html (7,400 bytes)

32. [TowerTalk] Inexpensive thrust bearing? (score: 1)
Author: Rob Frohne <frohro@wwc.edu>
Date: Wed, 21 Mar 2007 10:06:59 -0700
Hi Everyone, Does anyone have a source for an inexpensive thrust bearing? I have a plate on the top of my tower with a hole through it, and was thinking of putting a thrust bearing on, but the ones I
/archives//html/Towertalk/2007-03/msg00425.html (7,750 bytes)

33. Re: [TowerTalk] Inexpensive thrust bearing? (score: 1)
Author: Rob Frohne <frohro@wwc.edu>
Date: Wed, 21 Mar 2007 13:22:33 -0700
Thanks everyone for the ideas on thrust bearings. They have been very helpful. 73, Rob, KL7NA -- Rob Frohne, Ph.D., P.E. E.F. Cross School of Engineering Walla Walla College 100 SW 4th Street College
/archives//html/Towertalk/2007-03/msg00433.html (14,380 bytes)

34. [TowerTalk] How much weight can a prop pitch support without athrust bearing? (score: 1)
Author: Rob Frohne <frohro@wwc.edu>
Date: Wed, 21 Mar 2007 13:24:40 -0700
Hi Everyone, I have been advised by one person that if I use a prop pitch rotor, I need to make sure I use a thrust bearing, as the prop pitch wasn't made to support much if any weight. Can anyone gi
/archives//html/Towertalk/2007-03/msg00434.html (7,888 bytes)

35. Re: [TowerTalk] Inexpensive thrust bearing? (score: 1)
Author: Rob Frohne <frohro@wwc.edu>
Date: Wed, 21 Mar 2007 16:25:23 -0700
Thanks Jim, Gale, et. al., I will have the prop pitch mounted down in the tower about ten feet. The mast will thread through a bearing about ten feet above it that will hold side to side force. I was
/archives//html/Towertalk/2007-03/msg00439.html (18,571 bytes)

36. [TowerTalk] Variable phasing networks? (score: 1)
Author: Rob Frohne <frohro@wwc.edu>
Date: Wed, 21 Mar 2007 21:08:40 -0700
Hi All, You guys are giving me such good advice today, that I can't resist another question. I'm considering trying to phase a four element quad at 40 feet on one tower with a four element 20 meter m
/archives//html/Towertalk/2007-03/msg00446.html (7,052 bytes)

37. [TowerTalk] How do I get this prop pitch motor apart? (score: 1)
Author: Rob Frohne <frohro@wwc.edu>
Date: Wed, 28 Mar 2007 20:00:13 -0700
Hi Everyone, You have been so helpful with this prop pitch. I have determined that the motor doesn't turn, though the brake engages. I suspect the problem that everyone has posted about previously wh
/archives//html/Towertalk/2007-03/msg00592.html (8,263 bytes)

38. [TowerTalk] Photos of a Crank Up Positive Pull Down mechanism? (score: 1)
Author: Rob Frohne <frohro@wwc.edu>
Date: Thu, 05 Apr 2007 07:45:18 -0700
Hi, I have two Tri-EX THD series towers and have had trouble with them jamming when partially erected. I am thinking of putting a cable from the top section to a pulley on the bottom section so that
/archives//html/Towertalk/2007-04/msg00120.html (7,349 bytes)


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