Definitely learned something here, good write up.
The whole radio interference thing reminds me of a time I was at my dad's small engine shop. I think it was a blower he was running, and he walked outside with it to adjust the carb. He has a radio where I was sitting that is tuned into the airport's (Right across the steet) frequency. I noticed I was hearing the blower from a odd direction, only to find out I was hearing the motor running through the radio. (I'm not really sure if that is relevant, just thought it was cool).