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6DJ8 / 6922 / 7308

  • 6DJ8 / ECC88 is the "standard grade" of this family.  They normally have steel pins.
  • 6922 / E88CC is a "premium grade" version of the 6DJ8.  Most have gold plated pins, but many Sylvania manufactured 6922's have steel pins (a few Sylvania's are gold pin). 

  • 7308 / E188CC is generally the highest quality tube in the 6DJ8/ECC88 family.  Most have gold pins.  Sylvania's are steel pin.  They are designed with low microphonics and low noise.  Sections are usually pretty closely matched.