I'm starting to see a dramatic increase in the rate of failure on old chips like that, both at home and in my lab at work where I have drawers full of old TTL and CMOS -- in anti static packaging. I think that the hermetic seal of the IC packages are breaking down over the decades.
Typically the legs show high rates of tarnish on the failure prone chips, but I see that on good chips as well. I suspect the failure rate will go up. It doesn't bode well for a lot of old equipment and computers that employ these parts. Terry On Jul 22, 8:08 pm, Mimewar <[email protected]> wrote: > I'm up to three tubes, (coding takes longer than wiring) funny thing > is, the first 74141 (Fairchild I assume by the capitol "F") wouldn't > display "5" or "6", so I swapped it for another, this time the "4" > stays on all the time. I tried a third, and that one works. I have > caps added across all ICs, and the third try worked. Is this common? > Are the Russian 74141s better than the US? > > Thanks > > Shane -- 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.
