Originally Posted by LouisB
... I know not strictly 500 Kcs but never the less an amazing feat in an advanced technical age. Just thought I'd mention it...
Glad you did because I can't explain it either.
I still continue to participate in amateur radio morse competitions and to have the ability to extract one solitary signal from ten or more simultaneous transmissions on the same frequency or close by never ceases to amaze me.
Mind over matter?