The only fly in the ointment is moving the RX. We don’t know WHERE this noise is coming from... so if he moves, he may move CLOSER to rather than further away from the source...
I think a 904 notch on the RX may be a workable solution. Thanks, Ron. Mark - N9WYS -----Original Message----- From: [email protected] On Behalf Of Ron Wright Mark, At say 140 MHz 1.4 MHz is a long way, but at 900 it is 1/6th the distance. RF works in percentages. So the wide TX is really very close to your receive. The TX being 100 kHz wide might mean it is digital and this can be very wide with lots of signal MHz, but down 80 db, from its center freq. However, still this low level being so close could cause you problems. If a problem of overload then a cavity on your receiver would help and might solve your problem. It would give you protection from the stron 904 tx power. Also a cavity with a notch at the 904 TX freq might help doing the same. However, if this is from the 904 wideband noise then this means its wide band noise is on your receiver frequency. The solution is a notch cavity on the 904 TX itself which you might not have the previdledge of doing. They might not let you touch their equipment. In this case the solution would be distance and seperation you from him. Also moving the rcv freq as far as you can might solve this problem. Too bad you could not turn off the 904 tx for short period of time to see if this is the problem, but since very close in freq I would suspect it. However, they may be perfectly legal, just physics of radio. I've known of users at a site go around and just start unplugging others systems to see if they caused a problem. Some of these people are not longer allowed on the site. 73, ron, n9ee/r
