2 X 6679 / 12AT7 / ECC81 TUBE. NEW OLD STOCK IN ORIGINAL BOX.

BRAND: GENERAL ELECTRIC. 1950s PRODUCTION.

BLACK PLATES, RECTANGUARL TILTED GETTER, COPPER RODS, MATCHED PAIR.

TESTED IN AMPLITREX AT1000 TUBE TESTER:

94/100% EMISSION (EM) 98/101% TRANSCONDUCTANCE (GM) 0.6/1.0mA/V GAS

82/104% EMISSION (EM) 97/98% TRANSCONDUCTANCE (GM) 0.6/0.7mA/V GAS

CH165U1