[TowerTalk] Element straightness

[Tom Haavisto]

A number of years ago, a friend used a crane to install his TH6.  It got
hung up on one of the elements, and it put a 20 degree bend in the reflector
on one side.  At that point, it was too late to take to take it down and fix
it, so it went up as is.  The only difference he noticed was improved SWR.
Other than that, the antenna worked just fine.

You are right - the only difference between the 6DX and the 6DXX is the boom
to mast mounting mechanism - the 6XX being newer.  The 7DX has an extra
driven element - the idea was that "solid state rigs needed flatter SWR
across the band to avoid SWR rollback".



Tom - VE3CX



On Mon, Nov 9, 2009 at 9:54 PM, AD5VJ Bob <rtnmi at sbcglobal.net> wrote:

>  I just downloaded and compared the three Hygain TH series beams and there
> doesn't seem to be any difference in any of the SPECS
> between the 6DX, 6DXX and 7DX on gain, fb, wind load, turning radius, ect.
>
> The only difference seems to be in the boom to mast mounting mechanisms,
> interesting.
>
> Bob AD5VJ
>
> > I originally was searching for a different answer:
> >
> > I have a TH6DXX and have just assembled it and it is laying
> > on three fiberglass chairs out in the back yard. It is not
> > new, but used. I have noticed after preliminary construction
> > of all parts that the end most reflector mounting bracket is
> > bent such that the reflector ends bend in towards the front
> > of the beam. It is as though someone after assembling it
> > placed it on its end and rocked it back and forth or something.
> >
> > Do I need to buy a new bracket (diminished F/B?), it is not
> > apparent that any mechanical soundness has been lost in the
> > structure of the bracket, in other words is looks as strong
> > as the others, it is just bent forward whereby the ends of
> > the reflector comes angled forward about 4 inches at each end somehow.
>