JGBOYLES wrote:

I think I remember the number from the dlate 1960s but can't recall what
their main use was

The 40673 as I recall was a dual gate FET. Used in mixers and other stuff
dual gates were used. They were in a small metal package (TO-??) with 4 leads.
I think I remember their orginal application was CB xcvrs.
73 Gary N4AST

A lot of early solid state garage door openers used it, as well.
--
9 days!


Michael A. Terrell
Central Florida