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1 X 6F6G TUBE. NEW OLD STOCK IN ORIGINAL BOX.
BRAND: TUNG-SOL. 1950s PRODUCTION.
BLACK PLATES, FLAT GETTER, COPPER RODS.
TESTED IN AMPLITREX AT1000 TUBE TESTER:
106% EMISSION (EM) 114% TRANSCONDUCTANCE (GM) 2.4mA/V GAS
CH166U1