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539c

  1. tutor_turtle

    Socket savers for Hickok 539C tester

    My Hickok 539C gets a lot of use. The 7-pin subminiature, 8-pin octal and 9-subminiature are so worn, I have to tilt the test tube until the line meter moves before I can be sure it connected. When I have dozens off tubes to test, this can become frustrating. The 7-pin has been replaced with a...
    • tutor_turtle
    • Thread
    • 539c hickok socket saver tube tester tube testing
    • Replies: 5
    • Forum: Tube Audio
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