Thanks Tom, will see how it works out.
Mathew
----- Original Message -----
From: "Tom Manning" <[EMAIL PROTECTED]>
To: <Repeater-Builder@yahoogroups.com>
Sent: Wednesday, May 12, 2004 2:05 PM
Subject: Re: [Repeater-Builder] DB-304 Antenna Help
> 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
> > >
> > >
> > >
> > >
> > >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/Repeater-Builder/
<*> To unsubscribe from this group, send an email to:
[EMAIL PROTECTED]
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
