would it be easier to use the truss as a loaded dipole - you can mechanicaly
isolate it easily????
K4OJ
----- Original Message -----
From: "Paul Young" <k1xm@underwater.org>
To: <towertalk@contesting.com>
Sent: Tuesday, May 21, 2002 12:51 PM
Subject: [Towertalk] 40 meter boom, 80 meter dipole?
> I have a three element 40 meter beam. I'm thinking about
> matching the boom as an 80 meter short dipole.
>
> The boom length is 48'. The driven element is insulated but
> the parasitic elements are connected to the boom. They are
> full size and provide plenty of end loading. It has a T-bar
> truss which is not insulated but I don't think I would want
> to use it to feed the antenna.
>
> The problem, of course, is feeding it. Tilting the antenna
> is difficult, but I figure I can tip it once and install
> some sort of omega rod. Then I can tune it from the mast.
> The bandwidth may be narrow enough that I'll need to put up
> a relay to switch it to phone.
>
> Has anyone tried this? What sort of omega rod will I need?
> Any caveats?
>
> Paul, K1XM
> _______________________________________________
> Towertalk mailing list
> Towertalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
|