This is a Hickok 752A that I restored electronically and calibrated. This is a very nice tester and is very clean. The 752A has the ability to test a multi
Category: Tube Testers
Restored and Calibrated Tube Testers.
Hickok 539C with Digital MetersHickok 539C with Digital Meters
This 539C was not working because all three meters were bad. The meters were replaced with digital meter replacements and the tube tester was calibrated. Analog meters in tube testers
