(!!!!) (Best Siemens Single) CV492=ECC83=12AX7 Siemens Halske NOS 1968 (1.2/1.5ma) (Gm=1800/1900) (phono, mic, preamp)

1 low noise tube) CV492=ECC83=12AX7 Siemens Halske Germany NOS 1968 (163 series) 

Gm=1800 (1.2ma)

Gm=1900 (1.5ma)

NOS mA 1mA+

NOS Gm range 1600+

- Icon Audio power supply
- EAR 834P
- AESTHETIX IO PHONO