Help identifying a tube - is this a 6V6?

Discussion in 'Amps/Cabs Tech Corner: Amplifier, Cab & Speakers' started by kwaehner, Sep 15, 2019.

  1. kwaehner

    kwaehner Supporting Member

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    Hey all -
    I was organizing a few tubes I have stashed, and came across one that's not well labelled. It looks like a 6V6 type, but the pin pattern is different from some of the other 6V6s I have. As you'll see from the pic, it's a standard octal type, with pins 1 and 6 removed. There's some partial printing on the tube, looks like ...6GT

    So I'm thinking it's an 6V6GT, but would love a second (or third) opinion
    Thanks!
    [​IMG]
    [​IMG]
     
  2. Vanyu

    Vanyu Member

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    One big clue that jumps out to me is the "U.S.S.R" stamp. This tells me its likely a later production tube (80's?), and by this time I believe they had stopped producing the other (weaker) 6_6 varieties, so it's more likely than not a 6V6GT

    The pinout of the tube also supports this as pin 1 and pin 6 are missing from the base, something fairly typical of the 6_6 family. Even if it is no 6V6GT, it is at the very least a power tube that most likely has the same pinout as a 6V6. If you can find a tube tester, you could stick it in and set the tester to 6V6 and you should be able to tell if it will at least work in a typical power section.

    Personally, if it were me, I'd put it in a small cathode biased amp and see what it does, because I really do think that this is a 6V6GT.

    FWIW, the Soviet tubes weren't that great. IME, they're reliable enough, but have often had rather crappy construction
     
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  3. kwaehner

    kwaehner Supporting Member

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    Thanks Vanyu! Appreciate your input.
     
  4. oneblackened

    oneblackened Member

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    Yup, 6V6. Looks like a USSR build, so it's technically a 6P6S.
     
  5. kwaehner

    kwaehner Supporting Member

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    Thanks, oneblackened! I have an RCA blackplate 6V6 with only one pin removed, so the second pin being missing threw me off. Sounds like it's definitely a 6V6 type.
     
  6. Papanate

    Papanate Gold Supporting Member

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    It doesn't look like a Soviet Tube - The 6P6S's I saw from the USSR in the 80s didn't have USSR printed on them.
     
  7. Timbre Wolf

    Timbre Wolf GoldMember Supporter Gold Supporting Member

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    You don't need print to identify a Russian tube. The tube in question certainly appears Russian to me. The OP can confirm by looking for the "flying saucer" getter visible in this photo:
    [​IMG]
     
  8. Papanate

    Papanate Gold Supporting Member

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    I didn't say there weren't Russian tubes dude - I said that in the 1980s I don't remember any tubes with USSR printed on it.
     
  9. Timbre Wolf

    Timbre Wolf GoldMember Supporter Gold Supporting Member

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    :huh
     
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  10. kwaehner

    kwaehner Supporting Member

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    Looks like a match to me, thanks for the help!
    [​IMG]
     
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  11. Humble Texan Fan

    Humble Texan Fan Member

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    Said it didn't look like one, not that it wasn't one, didn't he?
     
  12. Timbre Wolf

    Timbre Wolf GoldMember Supporter Gold Supporting Member

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    Glean information if it’s useful. Otherwise... moving on. Life is too short to argue (over what? I’m not sure).
     
  13. kwaehner

    kwaehner Supporting Member

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    Well I thank everyone for the help. Seems to be a Russian-made 6V6 type.
     
  14. mc5nrg

    mc5nrg Member

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    One reason USSR was not printed on Soviet Union tubes that ended up in the USA through intermediate countries could be the US embargo after the Soviet Afganistan invasion/quagmire.
     
  15. Timbre Wolf

    Timbre Wolf GoldMember Supporter Gold Supporting Member

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    Yes - this is why they often ended up with "Made in England" printed upon them.
    [​IMG]
     
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  16. HotBluePlates

    HotBluePlates Member

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    I wound up with a pair sold by Ruby, and labeled "Brimar." They even faked other codes screened on the tube, but they were Russian 6P3S tubes.

    I also once bought a pair of "RCA 6L6GC" when I didn't know better. They were in faked RCA boxes, with RCA's logo stenciled on. Said "Made in Germany." They were a set of 6P6S tubes.

    Aside from the "Cold War" issue, these tubes were probably $0.50 each at the time, imported, faked labels/boxes supplied, and sold for $20-30/pair.
     
    Last edited: Sep 18, 2019
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