I picked up a Systron Donner model 7004 about 10 years ago, dating from about 1970. I was going to scrap it for the nixies before I realized it was still as accurate as my best modern DVM and had one more digit. But it wasn't NASA - I think the calibration sticker (now lost) said Goodyear. It had the optional battery pack. Inside the case were two 6V lead acid batteries driving a board that delivered 12V AC to a separate winding on the main transformer. I have the manual, but it doesn't say what the nixies are - just "Tube, readout, V0132". The next item is "Socket, readout tube, X0179" so I know they aren't wire ended.
(poor photo - low light) On Wednesday, July 17, 2019 at 10:52:56 PM UTC-7, TLaing wrote: > > 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 > > Sent from my iPhone > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/e065f66a-451e-4c52-8308-6ce998a806b1%40googlegroups.com.
