I live less than 15 miles from Wapakoneta Ohio the hometown of Neal Armstrong. Big celebrations are going on for the 50th anniversary of the APOLLO 11 moon landing. That got me to thinking about the NASA surplus Nixie Meters I purchased off EBay some years ago. I posted some pictures on the TCA group reflector just a little while ago for those that are interested. I have at least 5 of these units both Fairchild and Systron Donner. All model 7050 Volt Ohm meters. They use a neon lamp for the leading one digit and 3 Nixie tubes. I think NL 841 series. I think Systron Donner was a second source manufacturer. One of them has a date of 8-24-67 written on the power transformer which puts these meters in the APOLLO era at NASA. Tim Laing
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