I just measures, and the top cap mast adapter on the AB-577 is 2.35" OD.
> -----Original Message-----
> From: Jerry K3BZ [mailto:k3bz@arrl.net]
> Sent: Monday, May 30, 2005 8:49 PM
> To: Dana Roode; towertalk@contesting.com
> Subject: Re: [TowerTalk] Rotor on AB577
>
>
> 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@gmail.com>
> To: <towertalk@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@arrl.net _______________________________________________
> >
> > See: http://www.mscomputer.com for "Self Supporting Towers",
> > "Wireless
> Weather Stations", and lot's more. Call Toll Free,
> 1-800-333-9041 with any questions and ask for Sherman, W2FLA.
> >
> > _______________________________________________
> > TowerTalk mailing list
> > TowerTalk@contesting.com
> > http://lists.contesting.com/mailman/listinfo/towertalk
> >
>
>
>
>
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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