- Burnaby, BC, Canada
- May 26th
A Heathkit model TT-1 mutual transconductance tube tester from the mid 1960's, from a repairman's estate. I have done a basic inspection on the unit and it functions as intended, but should probably be refurbished with some modern capacitors and other parts to ensure reliable operation. It was brought up to operating voltage very slowly on a variac, and I have tested a 6V6, a 6B4G, and a 6BQ5 with expected good results.