www.devilfinder.com How did Nikola Tesla make his car run?

The part about,,,, in the Korean War,sometimes people would stand in
front of Radar Towers to warm themselves up,basicaly microwaving
themselves.
That,I definetly believe.In World War Two in England,a Radar was aimed
too close to a wooden Aircraft Hanger.Them nails started popping and
getting red hot.
So,what is so special about 70L7 Vacuum Tubes as mentioned Nikola Tesla
used in his amazing Pierce Arrow car?
cuhulin