[Top] [All Lists]

[TowerTalk] Re: Ham IV rotor installation

To: <>
Subject: [TowerTalk] Re: Ham IV rotor installation
From: (Bill Hider (N3RR))
Date: Mon, 17 Sep 2001 13:01:56 -0400
> 2. Does anyone ever actually "shim" the mast since HyGain said the
> rotor is designed for a 2 1/16 mast and the 1/32 in. shims each side
> are necessary to center the 2 inch mast. No one I've talked to ever
> said
> they "shimmed" any rotor. If so what do you use for shim stock?

I shim mine!  There's a formula in the HyGain manual that tells you how much
shim-stock to use depending on your mast diameter and thickness.  I used
some aluminum
I had laying around the shack and used a micrometer to measure its

> 3.  Do you allow the weight of the mast and antennas (Mosley Classic
> 33 WARC with 40m kit & Hygain 2m/440 vertical) to rest directly on the
> rotor or do you lift it slightly and tighten the thrust bearing so the
> rotor is just responsible for turning the antenna and mast, not
> holding the downward weight of the mast and antenna?  m.

I allow the antenna/mast weight to rest directly on the rotor.

> Any help appreciated, since I'm not sure all the damage to the rotor
> was caused by lightning, Norn said some internal parts were "chewed
> up."

Typically, the manual operation of the rotor brake and wind forces "chew-up"
a rotor over time.

Bill, N3RR

List Sponsored by AN Wireless:  AN Wireless handles Rohn tower systems,
Trylon Titan towers, coax, hardline and more. Also check out our self
supporting towers up to 100 feet for under $1500!!

FAQ on WWW:     
Administrative requests:

<Prev in Thread] Current Thread [Next in Thread>