Robert Swinney wrote:

Some of the analog fire control systems used large potentiometers ahead of op-amps wound in trig
fashion to strip off the functions of angles. The pots were housed in large PCB-filled drawers
called "coffins".


I still have a couple of the vacuum tube opamps they used.


--
Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.