UK Vintage Radio Repair and Restoration Discussion Forum

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- - Telecomms IC (https://www.vintage-radio.net/forum/showthread.php?t=179253)

wave solder

22nd Apr 2021 5:24 pm

Telecomms IC

I have six glass masks here which would have been used for IC manufacture, they are Marked STC LTD 1982

The six masks are labelled:-

51A STL-134A ISOL
91A STL-134A METAL 2
61A STL-134A METAL 1
811A STL-134A POLY.
121A STL-134A PASS.
41A STL-134A OHMIC

It would be interesting to know what the device was what was manufactured using them.

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