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hickok

  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
  2. pixelriffic

    Hickok TV-7/U Low readings

    Just bought this tester from Ebay. It was sold as serviced and calibrated. I was tested a number of known good 6CA7s, and it consistently showed about 5 ticks below the value in the guide. Worth noting that these tubes have been checked by two other testers. Small signal tubes, 12AX7s for...
  3. David_NC

    6GH8A Reading Backwards on Tester?

    I recently received a pair of NOS GE 6GH8As to use with adapters in place of 7199's in my ST-70. I have a Hickok 533a, so I thought it'd be a good idea to test them before putting them in my amp. The first one tests fine, though I had to use 6U8 settings (I cannot find the settings for 6GH8As...
  4. R

    Testing on Hickok 800 - 12AX7 vs ECC83 BIAS setting

    I couldn't find any discussion of this, so I'd appreciate your take: Hickok 800 roll chart says 12AX7 wants a BIAS setting of 12, but the Hickok 800/800A euro tubes supplement says ECC83 wants BIAS at 7. No other settings differ. Should be no difference beyond the name, right? As a 12AX7...
    • ring
    • Thread
    • 12ax7 ecc83 hickok
    • Replies: 16
    • Forum: Tube Audio
  5. David_NC

    New Goodies - Harman-Kardon A230 and A300 + Hickok 533A

    Like many, I'm always looking for a new project to add to my others! Over the weekend, I found a local guy liquidating his 'collection' due to downsizing his living space. I picked up a couple integrated amps - HK A230 and A300 (A30K, actually). Both are very good to excellent cosmetically...
    • David_NC
    • Thread
    • 533a a230 a300 a30k harman-kardon hickok hk
    • Replies: 16
    • Forum: Tube Audio
  6. J

    Hickok 6000 Tube Tester Repair and Restoration

    Today begins an awesome restoration project, one of the greatest consumer grade tube testers available the Hickok 6000 series. This one came with everything, though in considerable disrepair. Opening the box displays the condition of the unit. It is evident that there will be some wood work...
    • JRUBIN
    • Thread
    • 83 tube hickok hickok 6000 hickok 6000a repair restoration tube tester type 83
    • Replies: 5
    • Forum: Tube Audio
  7. thorpej

    Hickok 600A settings for Russian 6Н1П (6N1P)?

    I have a bunch of 6Н1Пs that I'm going to be using for OTL headphone amps. I'd like to do a quick grading of them, and was planning to use the settings for 6BQ7A on my Hickok 600A, but would entertain any other settings advice.
  8. thorpej

    1625 settings for Hickok 600A

    This post is purely for posterity, in the hopes that the Great Index In The Sky will produce a meaningful result for the query "1625 settings Hickok 600A" in future generations. 1625: Fil. = 12.6, Selectors = JR-4036-0, Bias = 25, English = 85, Press = P4, Mutual Conductance = 3800, Cap = P...
  9. Salbreth1

    Tube checker recommendation... Again

    So I'm looking for a checker that will do a variety of tubes as well as output matching. I'm fairly new to the tube world but from what iv read Hickok is one of the go to brands. I have a $600 budget and am looking at a calibrated 752A and an 800. Both are transconductance models. The first...
    • Salbreth1
    • Thread
    • hickok output tubes tube checker tube matching
    • Replies: 18
    • Forum: Tube Audio
  10. 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
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