One of my treasures is a George A. Philbrick operational amplifier, or "op amp" ...

analog31 on April 19, 2015 | parent | context | favorite | on: 1958’s One-Of-kind Analog Computer at Vintage Comp...

One of my treasures is a George A. Philbrick operational amplifier, or "op amp" that fits into an 8 pin octal socket and contains two 12AX7 vacuum tubes. It was doubtlessly intended as a component for analog computers.