[TowerTalk] slipping every so slightly off-topic

[Tom Rauch]

> The reason that an unmodified PRO demonstrates distortion
and
> an apparent reduction of close-in IMD is NOT lack of
primary
> selectivity.  The roofing filter bandwidth is +/- 7.5KHz
from
> center frequency.  All signals within the roofing filter
are
> AM demodulated to create the noise blanker drive signal.
This
> is amplified in a chain which is powered from the 8V rail.

You're talking about a totally different problem. You are
talking about the low pitched PRO rumble and I am talking
about IM3.

IM3 is the mixing of two signals that produces a third
"phantom" signal.

73 Tom