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2 X 6BQ7 MARCONI TUBE. NEW OLD STOCK IN ORIGINAL BOX.
BRAND: MARCONI. 1960s PRODUCTION.
GREY PLATES, HALO GETTER, MATCHED PAIR.
TESTED IN AMPLITREX AT1000 TUBE TESTER:
106/98% EMISSION (EM) 106/102% TRANSCONDUCTANCE (GM) 0.8/0.8mA GAS
102/97% EMISSION (EM) 103/94% TRANSCONDUCTANCE (GM) 1.4/1.0mA GAS