[TowerTalk] Rotor on AB577

[Jerry K3BZ]

The top cap on my AB577 tapers down to 2.75" OD, and with 1/2" wall
thickness the ID is 1.75".  A short piece of pipe will fit in the 1.75"
center hole.  Drill a hole thru the pipe to accept a 3.5" bolt so it extends
out , such that when you insert the pipe in the hole the bolt fits neatly
into the slot in the top cap. That holds the pipe "mast" and keeps it from
turning so you can mount your rotator on the pipe. Of course the bottom
clamp on some rotors (such as the AlfaSpid) will expand to fit 2.75" so you
can mount it directly onto the top cap, with the antenna mounted to a short
piece of pipe on the top.

Just some ideas.... 73,  Jerry K3BZ

----- Original Message -----
From: "Dana Roode" <dana.roode at gmail.com>
To: <towertalk at contesting.com>
Sent: Monday, May 30, 2005 8:34 PM
Subject: [TowerTalk] Rotor on AB577


> Hi all,
>
> I have a AB577 mast and I need to put a rotor on it - if someone out
> there has done this and would like to share your approach with me,
> please drop me a line.  I built an adaptor I am not completely
> satisfied with out of the top piece I got for the 577.  Does anyone
> know if other top pieces for the mast are available somewhere?  For
> example, a mast adaptor to take the 5" diameter mast down to 2"?
>
>   Dana
>   k6nr at arrl.net
> _______________________________________________
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