[kw71]

You got it. When these birds were thought up, that was state of the art. Two years ago a dude I'm elmering told me he heard brazilians when he was tuning around with his sdr toy, so maybe they are still doing it today.

The uplink freqs are not any that are licensed for any amateur use, these flights are operating between 250-350 MHz.

Edit: look what I found http://mt-milcom.blogspot.com/p/alphabravocharlie-frequency-...

[b1r6]

Ahhh very interesting! It's so funny to think I could hit military comms just by tuning up a bit on my modded rig... Not that I will, because that's dumb. Makes sense given the age of the stuff!