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Kent's Radio Projects Page

Heathkit TT-1 Tube Tester
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.

Links to:

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