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2 X 5881 / 6L6WGB TUBE. NEW OLD STOCK.
BRAND: TUNG-SOL. 1960s PRODUCTION.
GREY PLATES, TRIPLE RECTANGULAR GETTER, COPPER RODS, MATCHED PAIR.
TESTED IN AMPLITREX AT1000 TUBE TESTER:
105% EMISSION (EM) 100% TRANSCONDUCTANCE (GM) 2.8mA/V GAS
93% EMISSION (EM) 96% TRANSCONDUCTANCE (GM) 3.0mA/V GAS
CH165U1