Hi all, I'm in the process of building up a little four-digit NL-5440A clock, and I had the good fortune to find a small bag of SK-185 sockets that mate with this particular tube. If you're familiar with the NL-5440A, you'll know that the pin spacing on the bottom of the tube envelope is quite tight, making the design of a faux-socket PCB (using Mouser pins, the sort that you see commonly with IN-18s and the like) very difficult.
However, it turns out that the SK-185 sockets that fit NL-5440As are also rather oddball. Here's a link to some detailed photographs and datasheet diagrams of the devils: http://www.tube-tester.com/sites/nixie/data/soc/SK-182-burr-cha/SK-185-burr-ch.htm I've tried several times to generate a sane EAGLE footprint that fits this socket, and have met with only failure. The socket has 16 pins, which would at first blush correspond to a 17-pin ring of evenly- spaced contacts, with one missing. That, however, is not not the case -- each 90-degree quadrant has four contacts, and they appear to be spaced unevenly around the circle. Before I go out and buy a set of calipers to measure this socket, has anyone managed to generate a working PCB footprint for it? Sean -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
