That's pretty cool for an old piece of junk. Love those hand-taped/drawn traces and the MC7441 Nixie tube drivers. Kind of surprised it's a fiberglass board instead of phenolic given the age of the parts. Must have been spec'ed for fiberglass due to its application. Was probably pretty expensive in its time.
It's a Heathkit IM-1212 voltmeter kit. It was probably outrageously expensive because it was sold by a school (in this case, Bell & Howell.)
It's a Heathkit IM-1212 voltmeter kit. It was probably outrageously expensive because it was sold by a school (in this case, Bell & Howell.)
A voltmeter with only 2 digits of display? That must have been a precision piece of test gear!
I'm assuming it was designed to teach you basic concepts like conversion and output, but still remain reasonably cheap.
It would have been better to use one of Intersil's chips, but that wouldn't teach you much.
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