I recently got a 453A off ebay because it was shown working with a bright CRT, and all the BNC connectors were still clean and shiny. It turned out to be amazing in real life, everything worked, (one slightly noisy intensity pot, slightly noisy vertical attenuators from not being switched in heaven knows how many years), the CRT is like new, and everything on it sparkles as if it has been sealed in a plastic bag for 40 years. needless to say, it had bad rear feet (I retrofitted our helimec feet in about 10 minutes), and some paint scuffs on the case, so I will re-paint later.
this 453A looks slightly different than normal, it is s/n B071809 (late), and has MOD 221T, does anyone have details on it? incredibly, the cal sticker said Tektronix, 1985, and the cal was still bang on. that is IMPRESSIVE, 33 years later, and still ticking like new. I am curious to learn more about this unit, as it is clearly a keeper, so any more info on MOD 221T is appreciated.
all the best,
walter (walter2 -at- sphere.bc.ca)
sphere research corp.
