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1 X 12AU7 TUBE. NEW OLD STOCK.
BRAND: HALTRON. 1960s TUNGSRAM PRODUCTION.
GREY PLATES, HALO GETTER, COPPER RODS.
AS YOU CAN SEE IN THE 5TH PICTURE, THE MICA IS BROKEN, BUT STILL IN PLACE AND DOES NOT MOVE WHEN SHAKED.
TESTED IN AMPLITREX AT1000 TUBE TESTER:
118/123% EMISSION (EM) 118/118% TRANSCONDUCTANCE (GM) 0.2/0.4mA/V GAS
CH165U1