Ruby 12AU7HG High Grade

Ruby 12AU7HG High Grade
$ 21.95
The Ruby 12AU7 HG high grade a select low noise 12AU7 made by the Shuguang factory in China. Excellent current production 12AU7/ECC82, it's got less gain than a current 12AX7 with a gain factor of 19 versus 100 for a 12AX7.

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