I Tried to Resurrect a 70-Year-Old Heathkit M-1 Handitester

27.9K views · 1.8K likes · Mar 22, 2026

I have a soft spot in my heart for old technology, so when I came across this Heathkit M1 analog multimeter at the Bar-Z Summer Bash swap meet last year, I just had to have it. We are going to try to get it tuned up and working, but it's 70 years old, and from the looks of it, it…