Description

All tubes have been tested on a Maxi-Preamp 2 machine under the respective settings for each type. The transconductance (gm), in uA/V or umho units, and gain (u) of each triode is written on each box as well as a brief description. Pairs are matched such that transconductance and gain are within 5% and brand/construction is the same. Singles are sold under one listing for each model/construction type. The image is representative of the construction, but tubes sold under this listing may have different markings or appearances than the image, though the functionality is identical. Type: 12AU7/ECC82 Brand: Mullard Description: Blackburn, grey ridged plates, halo gm1: 1390 gm2: 1350 u1: 15.7 u2: 15.8