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2 X 1626 / VT137 TUBE. NEW OLD STOCK IN ORIGINAL ARMY BOX.
BRAND: RCA. 1950s PRODUCTION.
BLACK PLATES, RECTANGULAR GETTER, MATCHED PAIR.
TESTED IN AMPLITREX AT1000 TUBE TESTER:
134% EMISSION (EM) 100% TRANSCONDUCTANCE (GM) 1.3mA/V GAS
131% EMISSION (EM) 95% TRANSCONDUCTANCE (GM) 1.8mA/V GAS