GT6l6 Black plate - Failure rate?

Discussion in 'Amps/Cabs Tech Corner: Amplifier, Cab & Speakers' started by Mastervolume, Feb 10, 2008.


  1. Mastervolume

    Mastervolume Member

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    I just retubed a friends Blues Deville after he blew a fuse. The amp had original tubes in it an I figured that one of the 6l6s had just given up the ghost. I retubed it with some gt black plates and after about a month one shorted.

    I thought that the issue was amp and have gone through it and can't see anything obvious. I have dropped in a set of pulls and the amp is running fine......

    anything else I shoudl check,

    voltages are all good.
     
  2. Blue Strat

    Blue Strat Member

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    What bias setting did you use?

    These tubes have no higher of a failure rate than any other new production tube, but when you have one out of 2 fail, the rate seems like 50%.
     
  3. Mastervolume

    Mastervolume Member

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  4. Mastervolume

    Mastervolume Member

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    Absolutely!

    I just wanted to make sure I wasn't overlooking something....
     
  5. Blue Strat

    Blue Strat Member

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    Nope, just the luck of the draw I'm affraid.
     
  6. slider313

    slider313 Silver Supporting Member

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    Send them both back to Pittman.
     
  7. Blue Strat

    Blue Strat Member

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    Uh, I know. I was just taking the perspective of the user who gets stuck with one bad out of 2 tubes ;)
     
  8. Mastervolume

    Mastervolume Member

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    Got his address? :)
     
  9. Blue Strat

    Blue Strat Member

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    Seriously. Email them. They've got a website.
     
  10. slider313

    slider313 Silver Supporting Member

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    Groove Tubes/Gt Electronics
    12866 Foothill Blvd.
    Sylmar,CA 91342
    818-361-4500
    FAX 365-9884
     

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