The RCA connectors are for audio. The larger connectors are for the video. I will have to go pull the SAMS later. I may use my variac to power it up.
This unit sat in a antique/drug store. It was not for sale. The owner decided to get out of the business and sold out to my antique dealer friend. He was none too happy to call me up and make a couple bucks. He knows that I will buy it if he finds them. I am an easy target!
He knows vacuum tubes are money in the bank.
Tim I will PM you on the connectors.
Jpdylon, I do not know where it was used. I was thinking maybe a class room.
polaraman