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Using a 6N6P in place of a 6DJ8?

Posted by zacster (A) on March 5, 2017 at 16:16:29

I understand that these tubes are not equivalent, and that the heater needs almost double the power, and even maybe the heater pins need to be swapped around. But will they operate at the same point? If I understand this correctly, the gain will be less, but there will be more drive, and also the resulting impedance will be lower, all of which I want. I'm driving 6B4G push-pull with the Curcio CCDA 6DJ8 driver, and I'm looking to go transformer coupled, but the circuit with the 6DJ8 has an impedance that is just too high. So if I plugged 6N6P in I expect I would get sound, and from what little I could find, "better" sound, but would I burn something else up in the process? I do have a 6.3v transformer that I could use for the filaments to take some of the load off the main power transformer if that helps.

The alternative is to build an entirely different amp of course, but that is longer term. I'm just looking for something quick to try, and would probably not use it that way except as an experiment.

I'm not looking to do any damage, just try something new. These tubes are cheap enough that if I don't like them it isn't a great loss.

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