Upside down Nixie tube clock (1972, USA)
This interesting early 1970's Nixie tube clock was built using mostly HP parts, which leads me to suspect it was built by an HP engineer, but it's of course possible someone just scrapped one of their frequency counters later on to build it.
As promised, here is the link for an explanation of the setting circuit mod: https://www.youtube.com/watch?v=JIGueMDpCe8
Видео Upside down Nixie tube clock (1972, USA) канала 50sTransistorRadios
As promised, here is the link for an explanation of the setting circuit mod: https://www.youtube.com/watch?v=JIGueMDpCe8
Видео Upside down Nixie tube clock (1972, USA) канала 50sTransistorRadios
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