If not, does anyone have a
cheap duplexer they would like to part with that will do the 600Khz
split. Nothing all that big needed, I'm only going to stuff 40 - 50W
in to the duplexer.


One way to get away with using a cheap duplexer for 600KHz splits, is to
use two antennas. Run half the duplexer for the TX line to one antenna,
and run the other half of the duplexer for the Rx line to the second
antenna. Between what isolation you can get with the duplexer cans, and
the isolation you get running two antennas with 20 or 30 feet vertical
seperation, you should get good performance.


Ed