Posted by pjw1967 on February 21, 2018 
I rode those cars in the '70's. I think they had electric heating and a/c. If I'm correct, how did those F's supply juice for those services?
Posted by Kurt Thompson on February 22, 2018 
At the rear of the F7 you'll see an exhaust muffler. The unit was probably equipped with a separate HEP power plant at the rear to provide electric for A/C and lights in the coaches.
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