I purchased a Babcock MT-5A on ebay and I'm trying to locate a schematic. I found a manual/schematic for a Babcock MT-5B on BAMA but there's more than minor differences between the two transmitters.
This is a mobile (AM only/no CW) phone transmitter from 1953 that's about half the size of a shoebox (weighs 9 pounds). It uses a 6146 in the RF final that is plate and screen modulated by a pair of 6AQ5's.