On Mon, 29 May 2006 23:15:07 -0500, Ed Bailen wrote:

There is a local repeater system here that was put together by an
impoverished college student many years ago. He didn't have much
money for duplexers, but he did have the gift of persuasion. He was
able to talk his way on to 4 towers scattered about town. He has
transmitters and receivers for 6m, 2m, 1.25m, and 75cm spread over the
four towers, all cross-linked. No tower has a transmitter and a
receiver on the same band. Each tower is 15 to 20 miles from the next
tower.

Ed

On 21 May 2006 14:17:19 -0700, "an old friend"
wrote:

haing gotten many of the peices of a 222 band repater and wanting to
put it on the air how much sepertion is required to avoid a paying the
price of a duplexer at 22 band


This does add the complexity of requiring multiple receivers, links,
sites and a voter to get even coverage, but if the equipment is
available, it works, or can work very well and you do not have the
ticklish process of setting up a series of band pass/band stop cans
which is usually three on transmit and three on receive.

I have forgotten the specific distance required for
separation/isolation, but it's considerable and I believe it's close
to a mile, maybe more. I'm sure some one on here can come up with the
specifics.

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com

any assiatnce welcome