[BC] Pre 1960 radios...

[r.j.carpenter]

My National Criterion (NC-1000) "binaural" AM/FM tuner has a "10 kc" 
notch filter in the AM section. There is a single slug-tuned coil. While 
I have the circuit diagram, I can't find it right now.


I thought the FCC had a rule prohibiting stations closer than 30 kHz 
separation in the same area.  It must have something to do with field 
strength, since we have 1580 and 1600 on opposite sides of DC.

bob carpenter