these are db 4140 notch cans. the origional connecting cables are 4" from connector to connector, which gives 6" from center of tee to center of tee. they are from a VHF 155/154 mhz range.
--- In Repeater-Builder@yahoogroups.com, "kd4wov" <kd4...@...> wrote: > > Hello All, > I am building a duplexer for use on 150.125 tx and 150.625 rx. this ia for > a mars machine. Yes i know this is a tough squeeze but this is what got > allocated to us for now. > i currently have 9 notch cans and 4 pass cans available. the machine > originally had 4 pass cans and a split of over 4 Mhz. When i measured the > system it has about 30db rejection with 4 pass cans. I think it would be best > to set the pass cans aside and go with notch cans, i could be wrong. > > I have come to the point where we are getting things ready to build. As far > as i can tell playing with the cans using oddball length cables (i know it > will not be accurate, but it was a test) i need at least 3 notches on each > side to make it work at an acceptable level. > > my 2 questions is : > > 1) what should be my cable lengths between cans. > > 2) what should my cable length between the cans and the antenna tee? >
