Up for sale, an identical pair of good, used Telefunken 12AX7 ECC83 tubes, probably from 1960. Description: 17mm gray ribbed (ladder) plates. White printing looks good.
Printed codes are the same: "ud". Diamond on bottom. Tested fairly strong on Bill Eccher-calibrated Hickok 539C tube tester at: #1: 1375 / 1100.
#2: 1375 / 1200. (minimum 875). Tested in circuit as well, superb sound. Buyer will receive 2 matching tubes, as shown. In white boxes. Will be well-packed in box and shipped within the US free of charge.
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