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Help me decipher these testing figures on NOS tubes?

Discussion in 'Pro Audio Equipment' started by gilbert, Jul 13, 2005.

  1. gilbert

    gilbert Guest


    Just wondering what the figures for tests on tubes represent, and what are good figures?

    Below I have two examples of testing figures for matched pair tubes. Which are the better performing tubes, and why?

    1. Tested : 13.5/11.8-12.4/11.2 7LC delta 0C1

    13.1/11.4-12.5/11.4 7LG delta OC1

    2. Tested : 9.8/9.8-9.5/9.5 7xx delta9A2

    9.2/8.8-9.8/9.3 7xx deltaF2


    Shaun Thomson

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