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2 X 717A RAYTHEON TUBE. BLACK PLATES. NOS MATCHED PAIR. NEW OLD STOCK IN ORIGINAL BOX.
TESTED IN AMPLITREX AT1000 TUBE TESTER
102% EMISSION (EM) 105% TRANSCONDUCTANCE (GM) 0.2 mA/V GAS
108% EMISSION (EM) 117% TRANSCONDUCTANCE (GM) 0.2mA/V GAS
CB402.D