I have a 440 repeater transmitting 442.850 and receiving on 447.850. We are hearing interference on the repeater from 453.550 which we confirmed on a scanner. This 453.550 frequency is not at the same site as the repeater (it isn't extremely strong), however there are many other transmitters on the same hill. We figured that maybe the 453.550 frequency is mixing with the transmitter frequency of 442.850 to give 10.7MHz, which is the first IF of the receiver. The receiver is a Hamtronics R304. The duplexers are Wacom WP-678-R2.
Originally, I was thinking of buying a bandpass filter such as one from DCI, but it seems that this would not attenuate the 453MHz frequency very much. Could the transmitter signal be getting into the receiver and mixing there? What could be causing this problem and how would I correct it? 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/