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Mullard XF-3's

Discussion in 'Amps/Cabs Tech Corner: Amplifier, Cab & Speakers' started by samwheat, Feb 27, 2006.

  1. samwheat

    samwheat Member

    Messages:
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    Aug 14, 2005
    Location:
    Scranton, PA
    I bought a pair of marshall labelled rft el34's for 25 bucks and one showed a short on my tester ..... ebay

    So I email the guy about it hoping to get my money back or at least the cost of one tube ..... I have a SE EL34 amp anyway

    So he sends me 2 XF-3's ..... they test 7250 and 6750 mmhos

    Too wide of a spread?

    Many thanks to him!
     
  2. redjet55

    redjet55 Member

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    Jan 12, 2004
    if you’re single ended why would it matter?
     
  3. samwheat

    samwheat Member

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    Aug 14, 2005
    Location:
    Scranton, PA
    the RFT is for the SE amp

    the mullards are for my plexi clone
     
  4. Blue Strat

    Blue Strat Member

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    Location:
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    The "match" isn't great, but what's even more important is the current match. See how far apart they are when you bias them in the amp.
     
  5. donnyjaguar

    donnyjaguar Member

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    Canada
    I'd never buy tubes from eBay. You're virtually guaranteed to get the the runts of the litter. Another thing I'd never buy is NOS can caps. These are notorious for developing internal resistance when not used. They'll measure fine on a capacitance meter, but pump 450Volts into them and watch them heat up and explode, spewing brown goo all over your vintage electronics.

    DJ
     

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