**** See addendum video:
• Vintage VOM Rectifier ...
In this video, I explore the Heathkit M-1 "Handitester" VOM (multimeter), which was Heathkit's first multimeter from 1949. I cover the following aspects, according to the timeline numbers:
00:00 History
04:48 Overview
11:14 Internal views
16:24 Test leads
16:46 Demonstration
26:35 Closing the case
26:48 Beauty shot
27:11 Overview of the Heathkit M-1 manual
31:43 Schematic diagram (Heathkit version)
39:10 Schematic diagram (my clearer, redrawn version)
46:16 Circuit theory