[sdiy] CA3140

[gino wong]

I recently asked for help getting some ca3140 and i get a lot of help
including names of places where they are available.  A couple of you
were afraid thet it may be no longer availble , which is what i
thought.  I ordered some from Mouser and asked them about
availability. I was sent and was told that all you can find new are
SOIC versions with the same pinout.  (.50 soic to dip turnarounds from
Futurelec work well)  So effectively the Dip version of of the ca3140
is gone just like so many of those other rca semis from the
electronotes era.

NOS chips  can still be gotten from smaller suppliers some with house
numbers (at least the 3086s I recently got)