Restoring an HP 521A Frequency Counter: Part 1

Picked video by video from Usagi Electric (mixed channel): title plainly names a teaching subject. Channel transcript sample: Two of three transcripts show genuine hands-on technical teaching (circuit design and testing), while one is a vlog-style project/event update with museum promotion.

A 22-minute video from Usagi Electric: “Restoring an HP 521A Frequency Counter: Part 1”.

Video by Usagi Electric, played through YouTube's embedded player.