Why not extend the boom ends enough to mount an element housing on each end
with element tubes
extending out from the ends. Then you could retract the normal yagi elements
and extend the boom end
elements to turn the boom into a 30/40M dipole. Going back to the normal yagi,
retract the 30/40M
extensions. Separate feeds of course. Wouldn't extend the turning radius very
much. It's really just
a modified SteppIR dipole with one extra motor housing. Should be able to use
one controller.
73, Jerry K3BZ
----- Original Message -----
From: "Joe Subich, K4IK" <k4ik@subich.com>
To: "'Kelly Johnson'" <n6kj.kelly@gmail.com>; <towertalk@contesting.com>
Sent: Wednesday, March 16, 2005 7:47 PM
Subject: Re: [TowerTalk] SteppIR gain
>
> Kelley writes:
>
>> It would be nice if a 3L SteppIR could be built WITH 40m, but
>> still with a relatively small turning radius because for most
>> suburban dwellers the turning radius is as important as the
>> aesthetics.
>
> I would not rule it out ... but understand the magnitude of the
> task you propose. A single feedline antenna that works from
> 6.9 - 30 plus 50 - 54 MHz in a relatively small form factor
> (not significantly bigger than a three element 20 meter yagi)
> with high efficiency.
>
> 73,
>
> ... Joe, K4IK
>
>
> _______________________________________________
>
> 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
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> 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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