(!!!!) (Best Siemens Single) ECC83=12AX7 Siemens Halske Germany branded SONOTONE NOS 1960 (Gm=1900/2200) (1.3/1.7ma)

1 low noise tube) ECC83=12AX7 Siemens Halske Germany branded SONOTONE NOS 1960 (162 series) yellow printing

Gm=1900 (1.3ma)

Gm=2200 (1.7ma)

NOS mA range 1.0mA+

NOS Gm 1600+

Recommended for:

- Icon Audio power supply

- EAR 834P

- AESTHETIX IO PHONO

- microphones