(!!!!) (Best Westinghouse Single) 6SN7GTB Westinghouse USA black plates NOS 1963 (8.2/8.0ma)

1 Low Noise Tube) 6SN7GTB Westinghouse USA black plates NOS "O" getter halo 1963)

8.2ma Gm=2800

8.0ma Gm=2700 

Good Ma range 7-10ma

Good Gm range 2300-2600

- Conrad-Johnson CAV-50 intergrated amp
- Atma-Sphere MA-1 Mk II.2 Amplifier
- Antique Sound Lab AQ1006 Mono Block amps
- CARY preamps and amps
- Rogue Metis 2004
- Wright Sound