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2 X 6922 TUBE. NEW OLD STOCK IN ORIGINAL BOX.
BRAND: AMPEREX. 1970s PRODUCTION.
GREY PLATES, HALO GETTER, GOLD PIN, MATCHED PAIR.
TESTED IN AMPLITREX AT1000 TUBE TESTER:
90/105% EMISSION (EM) 99/105% TRANSCONDUCTANCE (GM) 0.4/0.7mA GAS
93/101% EMISSION (EM) 102/107% TRANSCONDUCTANCE (GM) 0.2/0.4mA GAS