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In Reply to: RE: which is it? (or below zero VD day ramblings) posted by sober1 on February 14, 2015 at 10:27:30
If you are asking if the 5881 is equivalent to a 6l6 that is correct. In spite of the differences in appearances the tubes are interchangeable. The 5881 is a heavy duty or mil-spec version of the 6l6. I am listening to a pair of Tung sol 5881s in my SE amp and the sound is very good. cheers, Dak
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I guess just rambling out loud about how dissimilar the physical appearances are amongst the "equivalents". And if I'm learning this tube stuff correctly, equivalent is not necessarily identical as the equivalents can have different physical constuction, different pin outs as well as different operating points?
so to my understanding, a 5881/6L6 they are the same only different.
"the only thing necessary for evil to succeed is for good men to do nothing"
The 5881 and 6l6 are interchangeable. They have the exact pin out and operating conditions. The only difference is the 5881 has a higher power output and can handle higher voltages. The term equivalent is more open ended in that the term relates more to the operating conditions. Such as the 6sn7 and 6cg7 are equivalent but obviously they are in totally different packages.
Right now in my RH universal amp I have used 6l6, 5881, and EL37. If I switch the tube rectifier to a 5Y3 for lower voltage I can use the 6v6 tube. If my power supply was more capable (output more voltage) I would be able to use 6550 tubes. It takes tube rolling to a whole new level! cheers, Dak
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