[Heathkit] Fwd: SN7476N needed - JK Flip Flop

Ron W4BIN Youvan ka4inm at gmail.com
Thu Jan 16 14:33:06 EST 2020


    Bruce WK3A4712  Hudler WK3A via wrote:

> Ron I can use another one - Im working on (3) Heath ID1390 digital thermometers and this IC is very fragile. The pins are sooo thin and small they break off if you try to remove them after being in the socket for 45 years. The last one lost 3 pins removing it very slowly. Thanks

   When that happened to me in the past I soldered little wires onto 
whatever was left.
The pins were made of solder plated brass from some manufactures, 
other's were made
from tin plated steel.  Eventually the steel pins rust away, possibly 
the unit's original
problem.  (A problem with Chinese parts!)
-- 
   Ron  W4BIN - Understanding is much better than
                                     knowing how.


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