RT60

It's pretty much illegal to listen to live ATC in the UK - although Channel 9 is a bit of a 'grey area' mind you, most United flights that have it at all shut it off once handed over to UK airspace controllers. So you can listen basically till your Atlantic crossing is complete. But you're right, it has been disappearing recently anyway.

Love your "tone." What kind of guitars, amps, effects etc are you guys using nowadays? Has it changed a lot over a decade?