[time-nuts] HP-59309A Clock counts only seconds

Mark Sims holrum at hotmail.com
Mon Apr 3 21:38:44 EDT 2017

I have dozens of thingies with 4000 series CMOS in them.   Yes, chips can fail regardless of the logic family type.  I have not noticed anything particularly bad about 4000 series.  In fact, I have seldom needed to replace any.

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