1974 Brain Box saves the day.

BillGrissom said
...The TO-220 transistor would likely work if they properly heat-sinked it. That is what the big screw-hole is for, and you see them bolted to a thick heat-sink in every commercial product. ...
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Proper heat sink on a TO-220 board (Rev-n-Nator). you could mod the Chicom stuff if you wanted to get the TO-220 a place to send its heat.
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