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2 X ECC83 TUBE. NEW OLD STOCK IN ORIGINAL BOX.
BRAND: BEL. 1960s PRODUCTION.
GREY PLATES, HALO GETTER, MATCHED PAIR.
TESTED IN AMPLITREX AT1000 TUBE TESTER:
133/116% EMISSION (EM) 112/112% TRANSCONDUCTANCE (GM) 0.1/0.0mA GAS
133/116% EMISSION (EM) 118/112% TRANSCONDUCTANCE (GM) 0.1/0.1mA GAS