JJ 6L6 - #17 - HOT - Peavey 5150

• Sofus C., 03/19/2021
  I love JJ powertubes. Their tone is noticeable warmer.
  But I can honestly say that their lifespan is to short. I have had at least 4 sets of 6L6 JJ tubes, that begin to rattle and sometimes produce microphonics. Its my oppinion that they could be made a bit more sturdy. None of these tubes have been on "the road", so one can rule out handling issues.
  I have Tungsol powertubes for years in other amps.
  And yes, My amps are measured for correct Bias, and would only give this feedback if I feel its researched well enough.
  JJ tubemakers. Please consider making your tubes more sturdy JJ tubes, that begin to rattle and sometimes produce microphonics. Its my oppinion that they could be made a bit more sturdy. None of these tubes have been on "the road", so one can rule out handling issues.
  I have Tungsol powertubes for years in other amps.
  And yes, My amps are measured for correct Bias, and would only give this feedback if I feel its researched well enough.
  JJ tubemakers. Please consider making your tubes more sturdy
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• Yann C., 01/25/2018
  Quad of JJ-6L6GC bought to replace a old (10 years old) but valorous quad of Ruby 6L6GC-STR in a Peavey 6505 plus head. Excellent replacement, bias test voltage and bias plate current in specs and 99% comparable to the values obtained with the Ruby set (so, no bias adjustement using trim pot). Sound rules too, similar to Ruby but slightly more punchy and brilliant. Conclusion : I recommend this quad of 6L6GC for any 5150/6505 owner. test voltage and bias plate current in specs and 99% comparable to the values obtained with the Ruby set (so, no bias adjustement using trim pot). Sound rules too, similar to Ruby but slightly more punchy and brilliant. Conclusion : I recommend this quad of 6L6GC for any 5150/6505 owner.
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