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2 X 6F6G MARCONI TUBE. USED.
BRAND: MARCONI
TRIPLE SQUARE GETTER, COPPER RODS, PAIR.
SOME TUBES HAVE "CLINC BASE", SOME MATERIAL IS LOOSE INSIDE THE BASE, ALTHOUGH THE BASE IS SECURELY GLUED, IT MAKES NOISE WHEN YOU SHAKE THE TUBE. THIS DOES NOT AFFECT ITS FUNCTIONALITY.
TESTED IN AMPLITREX AT1000 TUBE TESTER:
79% EMISSION (EM) 93% TRANSCONDUCTANCE (GM) 0.4mA GAS
90% EMISSION (EM) 100% TRANSCONDUCTANCE (GM) 0.4mA GAS