🚀 go-pugleaf

reynhout@wpi.wpi.edu (Hagbard Celine) writes:

>   From what I understand now, the AM signal dropped considerably, allowing a
>lower-power broadcast at the AM demodulation circuit's RESONANT frequency to
>be picked up.  This is done quite intentionally.  For some reason, 660Hz comes
>to mind, but this doesn't sound right, and I don't know enough about rf to
>say one way or another....but I'm sure someone (almost everyone?) out there
>does...

It has nothing to do with the AM demodulation circuit's resonant frequency 
(I assume you mean the IF).  Basically, the traffic report signal was strong
enough to make it through all the filters in the AM receiver (these filters
tend to be poor anyhow, compared to most other kinds of radios), and still be
strong enough to reach the detector with decent strength.  Since you're in 
a long tunnel, it doesn't have to fight off other stations.

-- 
Trip Martin  KA2LIV                           Trip_Martin@mts.rpi.edu 
night@pawl.rpi.edu                          night@uruguay.acm.rpi.edu
** Murphy's Law of Thermodynamics: Things get worse under pressure **