At 3/23/2007 20:00, you wrote: >Sam, > >Just to give you a ballpark estimate, I used CommShop for Windows to >generate a solution for a 50 watt transmitter that is separated by 600 kHz >from a receiver with 0.25 uV sensitivity in the 2m Amateur band. CommShop >reported that a minimum of 90.14 dB of isolation is required, which can be >met with a vertical antenna separation of 240 feet- assuming that the >antennas are identical and are exactly in line with each other vertically.
I once operated a 600 kHz split 2 meter repeater with 1 pass cavity on the TX (17 dB down @ 600 kHz) & only 60 ft. of vertical separation on the antennas; absolutely no desense. Radio was a G.E. MVP with 100 watt external PA.
