Reviving this older thread.
Can others respond to their VHF-AIR performance? My 396XT is absolutely terrible! It's shocking that's it's so bad. I am using the latest firmware. I've also tried with AGC on and off.
Test scenario:
Hook up my R/S Discone antenna to Icom A6 transceiver. Punch in BFI ATIS at 127.75 mhz. It comes in loud and clear. (This airport is less than 10 miles from me and I'm located on top of a hill.)
I hook up my 396XT and it won't even break squelch setting of 3. If I go to squelch setting 0 then it's barely audible. It sounds almost as if I'm getting some kind of overload or interference in the XT.
UPDATE: After tinkering with various antennas and setups, I've discovered that I'm getting extremely bad overload on VHF-AIR (AM mode.) I *must* use the ATT when listening to a channel. Now, the interesting thing is that when scanning this conventional group, the scanner seems to be fine.
Is this normal for others? I don't remember having this problem on the 396T...