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tv-7

  1. Walter R

    TV-7 Question

    Can anyone explain to me how the two filament selector switches are wired on a TV-7 tube tester? I want to test some Chinese 6N3 tubes which have the filament on pins 1 and 9, which is unusual for a US tube. The other selector switches are clear, but I’m not sure how to get the filament...
  2. Walter R

    TV-7 Data

    Does anyone have TV-7 tube tester settings for a Chinese 6Z4 or a Russian 6C4P, which is very similar? TIA. Walt I think I answered my own question. The 6z4 and 6c4p are supposed to be electronically equivalent to the 6X4 rectifier except they have a different pin out for the 2 plates and the...
  3. DRHamp

    Question Re: TV-7 tube tester & 6L6GC tubes

    Thought some knowledgable TV-7 person might have some insight: I have a Dan Nelson calibrated TV-7/U and I use 6L6GC output tubes in my Raven amp. My question relates to the TV-7 documentation vs. 6L6GC data sheet values for gm. The data sheet states that gm in pentode mode is 5200. TV-7...
  4. vaathi

    Need to find Tube calibrator

    Hi all. I went to pickup a SCA35 and the guy mentioned he will sell the tube tester if I am interested. It happened to be a TV-10A tester. I promptly emailed Dan Nelson for calibration and I got a reply that he calibrates only TV-7. I read somewhere TV-10A/U is similar to TV-7. Serial number of...
    • vaathi
    • Thread
    • tube tester tv-10a/u tv-7
    • Replies: 7
    • Forum: Tube Audio
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