At 3/15/2006 04:07, you wrote:
>On my 145.27 Hay's Mill repeater, I run 250 watts into the duplexer.
>My 2 meter remote base antenna is about 40 feet down the tower. It is
>mounted directly under the repeater antenna for best isolation.
>I use a large Sinclair Notch Cavity tuned to 145.27 placed in the remote
>base feeder. I can successfully link to pairs about 200 kHz from 145.27.
>All of the 146 and 147 band is just fine....
>
>If your link radio has a built in diplexer (duplexer), I suggest running
>another to separate the VHF from the UHF and only placing the cavity in
>the VHF line. If you are using a dual band antenna, use another
>diplexer to combine the signals back together.
>
>Kevin
Along the same lines, if you separate VHF & UHF on the remote base radio
you can use separate antennas, which lets you place the UHF much higher on
the tower. In fact, if you're still using a GP9 for your repeater antenna
you can split that off & use the UHF side for your remote base. Kind of
doing that in reverse here (2 meter remote base TX combined with 440
repeater output TX).
Bob NO6B
>n9lv wrote:
> > What I need to know is if there is any type of isolator or other
> > device that I can put on my dual band radio that will keep my two
> > meter transmitter out of the 2 meter side of my radio. I know this is
> > a long shot, but if it can work, it would be excellent.
> >
> > What I am running is 120 watts out of the duplexer on 145.410 Mhz.
> >
> > Any suggestions. The antenna's are on seperate towers but only about
> > 40 feet apart base to base, the remote base antenna is at 90 feet and
> > the repeater antenna is at 130 feet.
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