12AX7 ECC83 Siemens for Sonotone (lot of 4)

Description

I acquired these tubes used and with out original boxes.  The diamond plate mark is on the bottom as is vintage tradition. They are telefunken 12ax7s with ribbed plates.  They are pulls from a fisher amplifier that have a good amount of life left in them. All were tested in my Hickok 752A (CALIBRATED)
TEST SPECS AS FOLLOWS:
Tube A: 350/350- 200 min
Tube B: 350/375 - 200 min
Tube C: 350/400 - 200 min
Tube D: 375/400 - 200 min
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