On Mon, Dec 14, 2015 at 6:32 PM, dwight <dkelvey at hotmail.com> wrote:
Do remember when ordering 2114's that these are
all NOS units
and just about as likely to be bad as the ones in your unit.
Too true. NOS doesn't mean it's working.
I don't know of any surplus place that has the
ability to test them.
Or the interestg.
Most any of the places that I've dealt with will
replace bad ones
but if dealing by mail order, it may not be worth the hassle.
Order a few extras.
That reminds me, I need to make a quickie little microcontroller-based
2114 tester. I have tubes of the chips (NOS from 1982 - we used them
in the COMBOARD 1) and no confidence of which ones work and which ones
do not. I'm sure 98% or more work. Which 98% is the question.
It's not hard to make one with a <$10 microcontroller. It's just a
question of sitting down and building it.
-ethan