Condition: NOS/NIB - Telefunken ECC803S (Spanngitter) is the best and most wanted ECC83/12AX7 ever made. Special frame grid construction, low noise, low microphonics, long life (>10.000 hours), Gold pins, internally balanced with dual support getter and diamond <> logo at bottom. This tube offered is still "Sealed" in original black/white Telefunken box. Very rare collectors item and for sure never used. Typical characteristics: Va=250V, Ia=1.2mA, Vg=-2V, Gm=1600.