At 8/20/2008 06:52, you wrote: >Be very careful when you put that pass cavity on the transmit side. When I >was in Virginia I had a repeater on 147.06 and late at night I would get >interference to it. Noticed the same to other repeaters in the area. >Narrowed it down to a repeater that a cavity was placed on the transmitter >side to help clear up some desense. Looking at the spectrum analyzer you >can see when the transmitter would become active it would have a spur >running from it assign frequency up the band to the public service >area. This happpened when the transmitter was idle for a while. Removing >the cavity cleared the problem. > >Again be careful. > > >David
If a TX goes spurious when a pass cavity is added, it's RFPA is defective & is in need of repair. Leaving the pass cavity off is very poor practice. Bob NO6B
