I'm using 60 ft of R25 tilted over using the W3GM
method. Gerry had four 100ft, a 60ft, and two 50ft
towers and they all used this method. Gerry did not
climb! W3MM, N2TK, and myself use this method (maybe
others). You CANNOT use a stock Rohn hinged baseplate!
You need to reinforce the stock model or build your
own heavy duty hinged base. There is a picture of the
gin pole section of my installation at:
http://www.dl1iao.com/album/k3nd99/k3nd99.htm
I use a 2500 LB winch with a two pulley arrangement to
give me an additional 2 X 1 mechanical advantage. BTW,
the tower is 4-way guyed so it can be tilted over by
just removing the safety cable and loosening the
"side" guys. W3GM used this method for over 30 years
with great success. We had them up and down all the
time.
I can take some digi pix of my installation and Email
to anyone that's interested.
73, Stew K3ND
(operator at W3GM 1970-1995)
> >
> Bob, you can do it but it isn't straight forward.
> The late, great Gerry
> Mathis W3GM used a "falling derrick" method to tilt
> over 100' of 25G with
> large arrays attached. I have a very bad slide that
> shows the derrick tower
> that normally rested on a winch bracket I could
> forward it to you, but it
> doesn't show very much detail. I've quoted a
> Towertalk message below for
> your reference. If you search "W3GM" in the
> towertalk archives, you'll find
> other messages concerning the use of this technique.
> I personally used it
> at his QTH on several occasions and can attest to
> the fact that it works
> well, and sure beats climbing a 100 footer in a
> March snow storm to fix a
> stuck rotor! I'd suggest you contact someone from
> the Frankford Radio Club
> as I understand there might be other members who
> currently employ this
> method, and may have plans.
>
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