Muncie Indiana
_____ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Joe Sent: Thursday, November 22, 2007 9:32 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Receiver overload Are you sure that 104.9 (WINN?) is the only FM station near your repeater? Looking at the data, it looks like 100.3 WYGB is possibly on the same tower. This is assuming that your repeater is in Columbus, IN. 73, Joe, K1ike David Epley wrote: > > I have a repeater receiver overload problem I am trying to cure. The > repeater is a 900mhz 927.7125/902.7125. There is an FM broadcast > station 100 yards away 104.9mhz. The repeater works fine at another > site. My transmitter is a Motorola Purc 5000 running 75 watts the > receiver is a converted maxtrac 800mhz radio. Duplexers are Telwave > BpBr 4 cavity. I have 10 to 12 db degradation when plugged into 3 > different antennas on the tower. When I use a 900mhz dish antenna > pointed away from broadcast tower I only have 3 db degradation. I have > tried 3 different maxtrac receivers, added 2 more BpBr cavities in the > receiver side and used 3 pole filters in the receivers with no > improvement. Today I looked at the signal level getting to the > receiver at 104.9. To my surprise I was getting -8 dbm at the > receiver. I believe this level is overloading the front end of my > repeater. I was wondering if a stub cut for the broadcast frequency > would work. Any thoughts would be greatly appreciated. > > > > > > David Epley, N9CZV > > Winchester, Indiana > >
