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
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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