1 X 12AX7 / ECC83 TUBE. USED.

BRAND: GENERAL ELECTRIC. 1960s PRODUCTION.

17MM GREY PLATES, HALO GETTER.

TESTED IN FUNKE W20 TUBE TESTER:

MINIMUM GOOD EMISSION = 60% = 0.7mA

0.8/0.8mA EMISSION (EM)

CH167U1