Hi Keith, Do you have the equipment to check each location for desense and effective sensitivity?
It would be very hard to make a notch cavity from Hard-line with enough Q to allow a decent 100KHz split. Even placing a band-pass cavities will help only so much... A DCI Filter would not be the right type of filter with enough of the protection you're hoping to receive. One last thing... what type of 10 meter antenna are you using and what type of match does it provide? The key is probably first listening to the receiver and UHF Link operation without the remote transmitter side on the air. First find out where the gremlins really visit your party so you don't chase your tail and waste time... cheers, s. > "kb1we6r" <[EMAIL PROTECTED]> wrote: > I need ideas to cure desense on a 10 meter repeater. > Details; > 1. 100KHz split, (29.66 out 29.56 in) > 2. Maxtracs on both ends, UHF link > 3. Several miles of separation > 4. Sometimes it works OK with no desense, but usually when the tx > comes up, a buzzing type of noise wipes out most signals, even ones > that were full quieting before. > 5. The buzzing sounds like powerline noise. > 6. There is some kind of wireless node nearby. > > What other types of noise generators could be exagerated by the > additon of the 10m transmitter? > > Is it possible to make a notch filter out of big hardline at 100KHz > with acceptable insertion loss? > > Would a window filter (DCI type) help with that type of noise? > ...Keith WE6R >
