Mathew
The harness was changed because it was both bad and needed changing to
accomodate the retuning. Generally the higher freq harness is not long enough
to allow the dipoles to be moved to where they should be. Some people have used
the harness and dipole placement as they were originally but with a slightly
higher VSWR. This does not give you the best pattern either.
73's de Tom Manning, AAF4UG
Mathew Quaife wrote:
> > Mathew
> > I am not familiar with that particular model antenna. I currently
> > use a DB224 antenna that I modified about 10 years ago for use at
> > 145.49Mhz. I figured how much to lengthen the loops by using ratio and
> > proportion, I then cut the loops and added the necessary aluminum rod.
> > I had the added rod and all aluminum connections heliarced. The antenna
> > has a very low VSWR and has given many years good service. This is not
> > bad for a recycled commercial antenna that cost nothing but a $200
>
> Was the harness changed to accomodate the antenna retunning, or to replace a
> bad one.?
>
> Mathew
>
> > phasing harness and a good deal of work.
> > 73's de Tom Manning, AF4UG
> > <[EMAIL PROTECTED]>
> >
> >
> > w9mwq wrote:
> >
> > > I have DB-304 antenna that at 156.100 gives a 1.2 VSWR at 50 ohms,
> > > looks real good. I want to use this antenna at 146.925, shows a
> > > VSWR at 1.5:1 at 74 ohms. What could be done to get this to a 50
> > > ohm impedance? All help would be greatly appreciated.
> > >
> > > Mathew
> > >
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > >
> > >
> >
> >
> >
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
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>
> Yahoo! Groups Links
>
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>
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