[TowerTalk] Water pipe
Lane C. Zeitler
Tue, 11 Nov 1997 23:39:22 -0800
Thanks for the tip. This is what "reflectors" are all about. I never even
considered this as a potential problem but it makes very much sense.
Kilo MIke Three Gulf
Sunny San Diego
> From: Lee Buller <email@example.com>
> To: firstname.lastname@example.org
> Subject: Re: [TowerTalk] Water pipe
> Date: Monday, November 10, 1997 11:10 PM
> At 08:46 AM 11/11/97 +200, you wrote:
> >K5GO wrote:
> >> If I am stacking antennas such as my little Cushcraft 2 Element 40
> >> is about 10-12 Ft above a 4 Element 20, I'll telescope a Schedule 40
> >> 1.00" galvanized water pipe inside the 1.5" one and drill and pin them
> >> near the top with 1/2 inch bolt.
> >That's EXACTLY what I did with my 402BA (2 el Shorty Forty) above a
> >205BA (5 el 20 short boom) for several years, without a problem. I
> >moved the same tower to the new station, this time with a C3
> >tribander below the 40. Within six months, a storm had bent the mast
> >about 30 degrees, just where it leaves the thrust bearing. It was a
> >bitch to fix!
> >Bottom line: On my new tower I went for the real stuff.
> >Chris R. Burger
> The issue I have with this senario is drilling the mast. I have done
> in the past, but if I had my druthers, I would never...never...never pin
> mast if I could help it. I don't care how tight you drill the hole, or
> hard the bolts are...the wind moving the beam around will wallow out the
> holes and the whole thing will get loosy goosy. Once you get a degree of
> arc (slop) in the mast, you will take out your very expensive rotor.
> warning...cause it has happened to me.
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