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Whoa! It has a 7 pin connector for the cable. OK, two pins will be used for the filament and should go to the power transformer.( Plug it in and you should get 6VAC.
Three pins go to the RGB selector switch. That leaves 2 pins left. Most likely Kathode and G1. So you have a 50/50 chance of connecting it right.
Do you have a 7 pin test CRT? I remember the early computer monitors (CGA) having a 7 pin base. You will need a socket to make a cable.
Its probably an OEM tester- used in the manufacturing environment and was only designed to test 1 type of CRT. Good luck.
It might be something like a B&K 400 tester which was very popular at the time.
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Last edited by kf4rca; 10-28-2024 at 11:34 AM.
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