I never heard of the 83.

Another topic is that I've had a small bag of voltage regulator tubes that I've been carrying around for THIRTY years thinking it would be so cool to put them in line on a narrow chassis and mount them on the wall. They aren't all the same color, and adjusting the current can slightly change the color, but they are all a very subtle shade in the purplish or pinkish range. Some of those are octal and some are 7-pin glass... would that be septal?

I had a summer job in 1967, I think, disassembling equipment. The age of the equipment was: military equipment... used... taken out of service... sold as surplus... physics department at UCRiverside used it... repaired it... took it out of service... one or two years later they gave it to me to take apart and keep whatever I felt might be usable.

I saw fantastic construction because lives depended on everything operating right and being serviceable. Every installation I do is a poor imitation of what I saw that summer. And nixie tubes, Philbrick amplifiers, just all sorts of stuff.