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John:
I bought a mahogany TV123 from the Phila distributor sometime around 57 or 58, at a bargain price. I performed the usual fixes and installed the mod kit. It worked well, but generated loads of in-cabinet heat. I mounted a 7" Kooltronic 117 VAC fan in the cabinet bottom and positioned it so the airstream flowed past the 5U4s and chassis vents. It did the job. It kept the 5U4s and horizontal output tubes cool enough to remove bare handed after hours of playing.
It was not too bad in a carpeted room, but when I moved it onto a bare wood floor, it was distracting. I removed the fan when I sold it to a Philco engineering manager. He sold it to another Philco engineer and I lost track after that. I often wonder if it survives.
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