I am clearing out my workshops... a bit... One of the items I have is a hand-made "something" from an IBM lab (judging by the "IBM" sticker on the inside). It has 3 BT style small uniselectors, and a whole bunch of tag-strip wired mostly Ge (with a few Si) semiconductors. 4 small nixies are the display
HT is generated by back-to-back xfrms - the HT side by a very small 50mA 12VAC/240VAC one. There are a stack of 12 small thin black boxes, about 1 x 2 x 0.25 inches which contain what looks like a OC77X-based monostable or bistable (not traced them out yet). Assuming these are actually /2 blocks, I suspect that they generate a 12-hour clock in association with the uniselectors - the left-most digit only has the "1" connected. The only markings I can see on the "logic" are "YL 6012" though that seems remarkably like a date code rather than a p/n... So, what do I do? Restoring this will just never happen with me - its a LOT of work. I have 3 *new* uniselectors of the right type just in case (T30338A 250ohm - 3 banks of 12 contacts each made by AEG, a standard "GPO type 4") - these are rarer than hen's teeth... Shall I strip it for parts, or let it rot even more... Its too big a unit to warrant staying in my workshop... -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to neonixi...@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
