(!!!!) (Best Siemens Single) ECC83=12AX7 Siemens Halske Germany branded SONOTONE NOS 1962 (Gm=1900/1700) (1.5/1.3ma)

1 low noise tube) ECC83=12AX7 Siemens Halske Germany branded SONOTONE NOS 1962 (162 series) printed in 1964

Gm=1900 (1.5ma)

Gm=1700 (1.3ma)

NOS mA range 1.0mA+

NOS Gm 1600+

Recommended for:

- Icon Audio power supply

- EAR 834P

- AESTHETIX IO PHONO

- microphones