Bob Ricci wrote: > Let's wrap this with a bow. > > I have tested this interference on 7 radios. 6 of them here and all 7 > hear the interference. Simply stated the interfering station is over > 100 miles away and is breaking squelch 10 Khz away on a Bendix-King > 5102X with a rubber ducky. Yep. 100 miles away on a rubber ducky 10 > Khz off frequency. Someone is wide, loud, and powerful. The receiver > is a Yaesu VX4100 with 85dB adjacent channel selectivity at 20 Khz. > That should be about 80 @ 15. If I have to switch to like GM300's > what guarantee do I have that the problem will be any better if the > other party is running excessive power and wide deviation? > > I have a complaint in with the coordinator and have not received any > acknowledgement that the issue has been received. I also emailed the > trustee and have not received a reply. > > I like to keep this cool and cooperative. > > Back to the question, though. Will something like a Angle Linear get > in close enough to knock down interference that close? >
No. The issue is at the IF level. Improving adjacent channel rejection is done in the low IF just before the detector. I had no problem listening to a distant repeater on 146.82 with a 146.805 about 1 mile away-in the path to the distant repeater, with a Motrac base-after the repeater was properly adjusted to not exceed +/- 5KHz deviation total. It had been throwing peaks close to +/-20 KHz.
