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« on: December 25, 2015, 0325 UTC »
Does this station simulcast an FM station? Plus and minus 19khz looks like feeding a mono FM tuner without the 75µs deemphasis directly into the audio input of the AM transmitter. Decades ago I modified an FM converter for the AM radio in a used car I had by removing the deemphasis. The converter put out an AM signal on 1400 kHz and also the stereo pilot 19khz above and below that. I also was able to slope demodulate SCA subcarriers 42 and 67 kHz away from 1400 kHz. Driving along in Chicagoland listening to muzak in the car was weird. Stereo DSB difference subcarriers 38khz away sounded like crap.