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Sovtek 12AX7WB dual triode.
W-ruggish valve -> made to withstand more vibration and is good for amp combo
This valve is very similar to the WC version. It has the same gain. The big difference is that has a “darker” tone than the other two. This therefore makes it an ideal valve to tame a very bright sounding amp. and the WB has the same gain as the WC