(!!!) (Best Value Single) 12AX7=ECC83 Telefunken Germany <> bottom smooth plates used/good 1966 (Gm=1600/1400) (1.0/0.8ma)

1 low noise tube) 12AX7=ECC83 Telefunken Germany <> bottom smooth plates used/good 1966 - some printing 1 section) Gm=1600 (1.0ma) 1 section) Gm=1400 (0.8ma) Low Noise and not microphonic Good Gm used range 1300-1500 Recommended for: Lamm Industries ML3 Signature mono amps, Nagra PL-L preamp VTL 7.5 preamp Conrad Johnson Premier 15 phono preamp Jadis Aesthetix Diva Audio M7 preamp EAR 834P Se Electronics Z5600a II Tube Condenser mic Veloce Audio Line Stage and Phono Amp MFA preamp Orange amps Pilot SP-210 preamp Jadis preamp George Wright phono THD Plexi-50 MXL V69 Mogami Edition Tubetech CL1B Audio Thrills phono AKG mic Bellari VP130 phono