This page is dedicated to the memory of Lloyd Generoux,
uncle and passionate tinker.
The TT-1 is Heathkit's flagship tube tester, featuring:
transconductance measurement for amplifier tubes
grid leakage and interelectrode short detection
diode and rectifier evaluation
thyratron and voltage reference testing
support for about 2,400 tubes (TT-1A)
While the TT-1 can test tubes with up to 9 pins, the TT-1A upgrade (not shown here)
was introduced with the advent of Compactrons to accomodate up to 12 pins. Schematics,
operating manuals and calibration instructions are available elsewhere on the Web.