overload

Ive seen multiple older (closed) posts about this particular scanner suffering from a front end overload/de-sense issue, and apparently ive been "had" on this one...Purchased cheap enough but it does in fact have the BCT15X deafness above the 10/11 meter bands. Nothing- not weather, fire...

Is there some way to help identify intermodulation and overload products from nearby cell towers, etc, without moving to a different location? I get a lot of garbage in the 440 - 470 Mhz range and it's hard to know the source. On a consistent signal I can check on another radio/scanner/antenna...

If I have my BCD436HP scanner on my person and I TX with my HT, will I overload the receiver? Most our HT's are 5W max with a ~6" rubber duck. What about if I'm using the scanner with a vehicle mounted unit? I think our work trucks have a 35w or 40w transceiver, UHF band with a roof-mounted...