Super Nice 1966 Silvertone Model 1484.......The Amp that Launched a Thousand Careers

From a channel Lumen includes in full: Uncle Doug, a retired electronics instructor, restores vintage tube amplifiers and test equipment in long lessons that explain each circuit, fault and measurement.

A 55-minute video from Uncle Doug's catalogue; the title names its topic.

Video by Uncle Doug, played through YouTube's embedded player.