"DougSlug" wrote in message . net...
Actually, I think the technical bulletin was implying that the transmitters
may sometimes be off frequency. Since I don't often monitor the air band, I
don't know if this is a common problem.


"Ron Ott" wrote in message
om...
I have the same interest in the Collins filters because they have
steeper and, presumably, deeper skirts.

Re the air bands, I thought the AR8600MkII had the correct step
programming for that band. If you're "on frequency", there should be
no problem with the filters. The wider filters would be better if
you're "off frequency" because your radio is scanning with the wrong
step intervals.

I have a plain 8600 with all the optional filters and I would not
recommend the Collins AM filter. Due to its "deeper skirt" AM
reception is a bit tinny and more harsh than the stock AM filter, I
find that listening to Milair and VHF aero can become a bit of an
effort after an hour or so. This is even the case with exteranl
speakers, although when it is connected to a Icom SP-20 it does become
bearable.