stingray327
Member
Sounds like overload from other nearby out-of-band transmitters. You may need a band-pass filter for the air band only or a notch filter for the particular frequency that's causing the overload and desense. For example, I've got a pager transmitter nearby that kills my Pro-163 and HomePatrol1. With the notch-filter in line I don't have any more problems.
Scanners are such wide-band receivers that it's pretty easy for a nearby FM transmitter or pager site to completely swamp the front end and destroy your reception. A better antenna makes it worse - not better.
What does this filter looklike? I have same problem in car with mobile antenna and in house with outdoor base antenna.