oh I know you weren’t lol.
Back in 1980’s before fully digital systems came in to play, we had aircraft computers using synchros.
These would from time to time get ‘stuck’ so on a number of occasions an aircraft rubber chock was used to ‘unstick’ the offending computer, the joys of analogue computers lol.
My father spent 22 years in comms in the RAF, he’d absolutely love this conversation 🙂
(My own experience of valves is limited to guitar amplifiers. They just sound so much warmer and primal than a solid state amp.)