Cut the wire tied together TX and RX cables on the back of the quantar and seperate them as far as possible.
On Fri, Aug 7, 2009 at 1:43 PM, tahrens301<[email protected]> wrote: > Hi Folks, > > Guess it's a good thing the antenna party didn't happen yet. > > Put the DB-224 up on a pole here attached to a portable building. > > Ran the 7/8" heliax from the antenna into my garage - about 100'. > > With a signal source from my monitor, the repeater would chop in > and out. Ugh-desense. > > I am using an old DBproducts 8 cavity notch-type duplexer. 4 on the > receive, & 4 on the transmit. The transmit side also has stubs. > (see old thread). > > First, I used my spectrum analyzer & sweep gen, and got what I > thought were pretty good notches in the right places (depending > if I was working on the xmit or rx side. According to the > analyzer, the notch was about 70dB below the high point. However, > I think that it was seeing the floor of the analyzer, not the real > notch. > > Then, I hooked up a signal generator on one side, and a receiver > on the other side, and tweaked a bit more for the least signal. > > All looked pretty good with definite notches, but it's obvious > there's desense. > > All cables are double shielded. > > The system is 147.10/70, running about 60 watts out of the > Quantar. Even running with battery-backup (20 watts), there's > still some desense. > > Could it be that these cans are just not enough, or am I doing > something wrong. > > Thanks! > > Tim > > > > > > ------------------------------------ > > > > Yahoo! Groups Links > > > >
