I heard a guy running a barefoot DX-60 in the 40 meter window from Lake Havasu, AZ a few you years back with a solid, clear signal during the AM Rally. Shocked the Hell out of me. The only guys who couldn't hear him were in the northern Great Plains.
Even if he modified the thing, it wasn't pushing more than 20 watts of carrier. Timtron was on him in record time. Talk about a pile-up of drifty transmitters!