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tube tester help

  1. Brow2070

    Weston Tube Tester Model 777 parts & issues

    Picked up a Weston multimeter 772 & 777 tube tester combo. I repaired the power cord for it and now I'm looking to find the short indicator bulb (My fault it broke!). After repairing the cord I had it up and running but then it stopped working so I took it out of its case and I must of put...
    • Brow2070
    • Thread
    • tube tester tube tester help weston
    • Replies: 7
    • Forum: Tube Audio
  2. vaathi

    How to test Ei KT90 tubes

    Hello friends... I came upon a pile of used KT90 and used Svetlana 6550C ( I don't know how to figure out if it is winged or not. 16 of KT90s dont have any marking and other 16 have Ei VTL in blue lettering. Guy who sold me said the amp he was using used these some 20 + years back and he...
    • vaathi
    • Thread
    • 6550 conar kt88 kt90 tube tester help
    • Replies: 4
    • Forum: Tube Audio
  3. C

    Easy hickok tube tester ? need help fast

    Im testing a kt66 tube the mu on the roll chart says 6300 . If the tube I test tests at 6300 is that a min reading or a strong new tube reading for mutual conductance. Thank you
    • chaztaylor
    • Thread
    • hickok mutual conductance average tube tester help
    • Replies: 7
    • Forum: Tube Audio
  4. C

    Need help with understandin average mutal conductance

    I recently bought out 3 radio store full of vacuum tubes. I have roughly 100000 vacuum tubes to test on a hicok tube tester that I just bought. I understand the roll chart up until it say average mutual conductance. Is that the min the tube should test to be good. Does that number for example...
    • chaztaylor
    • Thread
    • hicok tester mutual conductance average need help tube tester help vacuum tube
    • Replies: 35
    • Forum: Tube Audio
  5. C

    Need help with understandin average mutal conductance

    I recently bought out 3 radio store full of vacuum tubes. I have roughly 100000 vacuum tubes to test on a hicok tube tester that I just bought. I understand the roll chart up until it say average mutual conductance. Is that the min the tube should test to be good. Does that number for example...
    • chaztaylor
    • Thread
    • hicok tester mutual conductance average need help tube tester help vacuum tube
    • Replies: 1
    • Forum: Tube Audio
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