WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
Building, troubleshooting and testing of these amplifiers should only be
performed by someone who is thoroughly familiar with
the safety precautions around high voltages.
Doing some minor electrical work at a house the homeowner gave me a Heathkit UA-1 amplifier and a Elac XS200 record player. I also got some assorted papers with the stuff that had a manual for the record player and a receipt where the Heathkit was bought in 1958.