1 low noise pair) 12AX7A RCA gray ribbed plates NOS 1967-1973

1 tube) Gm=1500/1500 (0.9/0.9ma) 1973

1 tube) Gm=1550/1550 (0.9/1.1ma) 1967

Good Gm = 1400-1600

Good mA = 0.9-1.0mA+

recommended for:

- Matchless

- Vincent CD-S6 CD Player

- Dumble Overdrive Special clone amp

- Fender Twin Reverb 1964, 1966, 1990

- compressors

- Two-Rock Custom Reverb Signature V1
- UESUGI TAE-4 phono 2008

- Fender Princeton Reverb
- Fender Super 6 Reverb 1970's
- Fender Champ 1972
- VOX AC15
- Fender '64 Vibroverb
- SUPRO model # 1616T
- Conrad Johnson MV60SE
- Shanling CD-S100SE HDCD player
- Universal 175
- Teletronix LA-2A Compressor/Limiter
- Behringer T1954 Ultrafex
- Conrad Johnson MV60 2002
- McIntosh C8 phono