Ei 12AX7 variant

Discussion in 'Amps/Cabs Tech Corner: Amplifier, Cab & Speakers' started by rockon1, Jun 17, 2006.

  1. rockon1

    rockon1 Member

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    Just picked up 2 Edicron labeled Ei 12AX7's. First Ei's Ive seen with double supported halo and copper support rods.[​IMG]
     
  2. Blue Strat

    Blue Strat Member

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    Must be older ones. Are they microphonic yet?
     
  3. rockon1

    rockon1 Member

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    Actually they both are very low microphonically speaking. Gentle tapping while in the V-1 in my JSX is barely audible. Ei's are always a crap shoot as far as microphonics go for me. Ive got two GE branded Ei's that wont work in the V-!(too microphonic), 2 "Westinghouse" Ei's that are very quiet, 3 New Gold Elites that are worthless (very microphonic) and now these which are great.
     
  4. Blue Strat

    Blue Strat Member

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    Typically, even the ones that start out ok don't last very long. That's why I don't bother with them any more.
     
  5. Timbre Wolf

    Timbre Wolf GoldMember Supporter Gold Supporting Member

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    Mike, you talking about the older ones? You mean their microphonics issues were as bad in the '70s and '80s as they are today?

    I find that hard to believe, but if its true, I guess it explains how they continue going on with current-production practices: its an entrenched tradition.

    - T
     
  6. goneracin

    goneracin Member

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    I have some old ei's that are philips labled that sound killer, and arent micro. I have a couple of new ones also, but they are few and far between. Damn shame, as a good EI sounds killer, but thye usually are either microphonic, have a terrible AC hum, or are very unbalanced side to side.
     
  7. Blue Strat

    Blue Strat Member

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    No, I was talking about EIs in general. Maybe the modern ones are worse, I haven't seen enough old ones to gather any stats.
     
  8. rockon1

    rockon1 Member

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    OK so much as for the Ei micro chatter...has anybody seen an Ei like these?
     

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