[Towertalk] using AB-577 75' extension kit

[Dick Green]

Thanks for the reply Ron. So far, it's the only one from someone who has
actually used the extension kit. I've seen some serious deflection even at
50 feet with a rotor and beam at the top when the wind is blowing more than
about 10 MPH. I don't have a lot of confidence in those spring clips.

Thanks for the heads up on the hinge pins. I noticed the other day that the
asbestos (?) pad on one side of the brake had slipped sideways out of the
groove. I put it back in, but probably that needs to be watched as well.

73, Dick WC1M

> -----Original Message-----
> From: Ron D. Rossi [mailto:rrossi@btv.ibm.com]
> Sent: Monday, October 07, 2002 2:27 PM
> To: dick.green@valley.net
> Cc: Tower
> Subject: Re: [Towertalk] using AB-577 75' extension kit
>
>
>
> Dick,
>
> I have not seen a reply to your post yet.
>
> You really want a person per guy to go up to 70'. I have done it
> with just one
> other person and it can really get hairy. Now mind you I have put
> these things
> up quite a few times and am not put off by some serious
> deflection in the mast
> (a good five feet or more). Without the extension kit it is no issue
> whatsoever to do by yourself. The extension kit puts you over the
> edge with
> any reasonable antenna.
>
> By the way the wear out mechanism I have seen predominately are
> the hinge pins
> in the brake locking lever. Watch for that.
>
> --
> 73 es God Bless de KK1L...ron rossi(kk1l@arrl.net) <><
> Support Programmer for TRLog http://www.qth.com/tr
> QTH: Jericho, Vermont
> My page: http://www.qsl.net/kk1l
>
> >>>"Dick Green" said:
> > While we're on the subject of the AB-577, I'd like to hear from
> anyone who
> > has installed the MK-806/GRC extension kit. I've borrowed one
> and am just
> > about ready to start raising the tower (second set of anchors and longer
> > cables installed.) I've been able to raise the stock AB-577 to
> 50 feet by
> > myself with no problems, as long as the wind isn't blowing. Has
> anyone been
> > able to do that with the 75' version? The manual suggests that
> the guys be
> > manned, particularly when the wind is blowing, but doesn't differentiate
> > between the 50' and 75' version on that subject. The Ontario Surplus web
> > site says the 50' version can be put up solo, but says the guys
> have to be
> > manned when the wind is blowing or when raising to 75'.
> >
> > So, any comments from those who have installed the extension kit?
> >
> > 73, Dick WC1M
> >
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