(!!!!!) (Best Siemens Pair 1972) E83CC=12AX7 Siemens Halske Germany NOS triple mica 1972 printed in 1976 (1.0/1.3ma and 1.1/1.3ma) (best in phono stages and high end preamps)

1 low noise matched pair) E83CC=12AX7 Siemens Halske Germany NOS triple mica made in 1972 and printed in 1976 (1-3% matched) 1 tube) Gm=1600/1700 (1.1/1.3ma) 1 tube) Gm=1700/1800 (1.0/1.3ma)   Recommended for - PHONO STAGES (specifically) 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 [[end tab]]