machined pin sockets contain a cylindrical spring-sleeve.
(check with a magnifying glass)
they produce a good contact on all surfaces of the i.c. pin.
another good use for them is to repair those ceramic packages with side-brazed pins when you remove them from 20year old sockets and some pins fall off!
clean the pins on the i.c. including the remaining stubs, plug it in to a turned-pin socket and solder the stubs to the top of the socket-tubes.
now you have a 'module' that can be pluged into another machined-pin socket on the gameboard.
(and you dont have to buy another i.c. or bodge the pcb)
ANY MORE QUESTIONS?
L8r.
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