2 ideas: ground loop - 1 - check rcv antenna cables (all the way to the antenna) with a CLAMP-ON ampmeter.
2 - Get hold of a spectrum analyzer & scope the receiver feedline. Jim - KB6OKH --- In [email protected], "Gary" <[EMAIL PROTECTED]> wrote: > > I have an interesting thing happening on our two meter repeater. We > have what appears to be a blanking white noise that is present on the > input. The repeater is a split site system with a 440 link from the > two meter receiver site over to the transmitter site about 2000ft > away. There are no duplexers in the system to cause problems. > > The link on 440 is clean of any noise, so we are quite confident the > link is not a problem. > > On two meters, when a signal is anything less than full quiteing, we > get a white noise that will almost mask the audio. We have tried > different receivers such as the GE MVS and now a GE Master II. We > have removed the preamplifier with minimal results. The receivers > have excellent sensitivity and the tuning process of the receivers is > correct. We have also tried putting pass cavities ahead of the > receiver with no appreciable change. The antenna is a DB-224 mounted > on a broadcast tower just below the bays of an FM broadcast > commercial transmitter. We have turned OFF the fm broadcast > transmitter at times to check if perhaps this was the problem but no > change was noted. > > ANY IDEAS from anyone??? > > THANKS! > Gary - W5GNB > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
