GE 6DJ8 ECC88 RED LABEL TUBE NOS NIB CURVE TRACER SINGLE O GTR SWEET

CURVE TRACER MATCHED! I have a B&K 747 tube tester. This is a mutual conductance tester. I also use a Tektronix curve tracer for testing triodes. I give a number of evaluations for tubes. The lines show how the tube conducts throughout that range.

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