ef86 / ef806 -- same thing?

Discussion in 'Amps/Cabs Tech Corner: Amplifier, Cab & Speakers' started by AshlandBump, Aug 17, 2006.

  1. AshlandBump

    AshlandBump Silver Supporting Member

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    I'm looking at a "Tung-Sol EF806 SG / 6267" to try in the Normal channel of my Valvetech Hayseed. Is an ef806 the same thing as an ef86? If not exactly the same, are they interchangeable? If there is a difference, what is it?

    Thanks.
     
  2. doctord02

    doctord02 Member

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  3. Blue Strat

    Blue Strat Member

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    They are interchangeable, well, assuming that they meet the published specifications (which new production tubes rarely do, just ask Myles Rose from Groove Tubes who sell ONLY new production tubes).

    In European tubes, when the number transposes from 86->806, or 83->803, the latter version is a compatible upgrade of the former version.
     
  4. Damon

    Damon Member

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    With rare exception, e.g. ECC88 and ECC808 are not compatible.

    Same idea with reversing part of the code, it usually works, but there are exceptions... e.g. E83CC is an upgraded ECC83, but E80F is not compatible with EF80.
     
  5. billyguitar

    billyguitar Member

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    Myles has stated on the Dr Z amp forum that he will be testing the new tubes as soon as he can and he'll report his findings on that forum. I don't know if he will here or not.
     
  6. AshlandBump

    AshlandBump Silver Supporting Member

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    Thanks for all of the responses. Hopefully Myles will share the info. here too.
     

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