On 27-Feb-16 17:42, Paul Koning wrote: > Height Analysis was the category assigned to the N class part > numbers way back. The vocabulary was different > then. DEC modules included Pulse Amplifiers and Pulse delay lines. The > KA10 was built with asynchronous logic > (no clock). It's more likely that the name came from that - but I don't > know. It's actually quite odd that the NH14 > ended up there, as A* was used for DA/AD converters. It's possible that > someone slipped NH as a play on the > state past the chief engineer's office. Or it's possible that you're > on the right track and the application area > was one of the national labs. > I would guess a simpler explanation: the application area is nuclear physics, > so N may simply be "nuclear". > > paul > What the OML says (and what I originally posted) is:
Note that A is reserved for ADCs, which this device clearly is. It was actually quite involved to get a part number assigned. There was a passion for semantic part numbers, for consistency, and for accurate characterization. This one is an interesting anomaly. Aside from a series of packaged PDP11-based SCADA systems, very few N-series part numbers were actually issued, and they seem random. VAXcamera is one. "National Labs" = DOE facilities: Oak Ridge, Livermore, Sandia, Los Alamos.
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