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1 X 6201 / 12AT7WA / E81CC TUBE. USED.
BRAND: GENERAL ELECTRIC. 1950s PRODUCTION.
BLACK PLATES, D-GETTER, 3 MICA, COPPER RODS.
TESTED IN AMPLITREX AT1000 TUBE TESTER:
80/70% EMISSION (EM) 98/90% TRANSCONDUCTANCE (GM) 0.2/0.2mA/V GAS
CH166U1