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Technical Tips from Mark W. Persons
Integrated Circuit Adapter

Many integrated circuits are no longer available in traditional 8-pin, 14-pin, and 16-pin DIP (Dual Inline Package).  For replacement purposes, you many need to purchase SOIC (Small-Outline Integrated Circuit)  circuits with the same internal characteristics, but much smaller in size.  They are designed for surface mounting instead of through-hole or insertion into a socket. 

A 14-pin DIP integrated circuit is 0.75" long.  An SOIC equivalent is 0.35" long.  A DIP adapter is on the left for an SOIC on the right.

Here is an SOIC on an adapter socket.  Soldering the SOIC to the adapter takes a small soldering iron and a steady hand.  There are extra unused solder pads on this adapter, as you can see.
Once completed, the SOIC with adapter is plugged into a regular 14-pin IC socket.  If the soldering is correct, the circuit should work just fine.  In this case, it is an LM1877 audio IC in a Marti R-10 Receiver.

The things you have to do to keep old equipment running nowadays! 

The stories go on and on.  Stop in again sometime.  I'll leave the soldering iron on for you. 
Mark W. Persons   ham W0MH      

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