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2 X 30 MARCONI TUBE. NEW OLD STOCK.
BRAND: MARCONI. 1940s PRODUCTION.
CHROME PLATES, DUAL SQUARE GETTER, MATCHED PAIR.
TESTED IN AMPLITREX AT1000 TUBE TESTER:
225% EMISSION (EM) 100% TRANSCONDUCTANCE (GM) 0.7mA GAS
232% EMISSION (EM) 100% TRANSCONDUCTANCE (GM) 0.7mA GAS