> Have chance to install a DB 224 at 450' and another one
> anywhere below it. Using LDF6 on both runs. RF solid state
> 110 watts out. Wanting to know the pros or cons of running
> both antenna close together for more height with duplexer or
> spacing antennas for isolation without duplexer?
All other things being equal, I'd take split antennas over duplexing any
day. But I'd never connect a transmitter (or a receiver for that matter)
directly to an antenna without proper filtering. So if you're asking if
it's "OK" to just connect the transmitter and receiver to separate antennas
and let 'er rip, my answer would be no, don't do that.
Assuming you already have a suitable duplexer, split it in half (remove the
antenna tee), and use it as two separate filters to connect to the two
separate antennas. Space the antennas some nominal amount (greater spacing
= more isolation, but also more disparity between Tx and Rx coverage), and
you'll do quite well and have far fewer issues and sources of aggrevation in
the long run as compared to duplexing on a common antenna.
--- Jeff WN3A
