[BC] am receiver for monitoring at a 20 KW site.

Mike McCarthy towers at mre.com
Sun Jun 3 22:50:39 CDT 2012


We're fighting the same thing.  Co-located AM at the studio and we need
monitor another AM a few miles away as well as when it goes to night
power...2mV. The channel spacing has the local station 1/2 octave above
the desired station.

This despite the studios being contained in an AM Farraday cage.  The LC
filter you mention didn't work in the manner first attempted.

The problem lay in the overall receiver, including leakage through the
chassis.

So...we're also interested.

MM

> You don't mention the frequency spacing, but if it's enough, a simple LC
> series 'wave trap' tuned to the undesired frequency in shunt with the
> antenna connection might do the trick.  I used this trick with a Burk EAS
> receiver at a 1310kHz AM site to monitor an 830 kHz signal 50 miles away,
> and it did the trick.
>
> Steve Brown
> Radio Rangers
> Minneapolis



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