12AU7A = ECC82 = 7030. RCA USA 12AU7A. 12AU7A FACTORY SPECIFICATION is 10,5mA/10,5mA for 100% mA. REAL 1950s RCA LONG -PLATE 12AU7A. Since The Einstein Preamplifier uses only one 1 x 12AU7, it’s important to have a mirror-matched triode tube, low-noise balanced & matched like this 12AU7A.
12AX7B ECC83 / ShuGuang / Vacuum Tube / Valve Amplifier/Single One/ Original Box
1pcs ShuGuang ECC83 Vacuum Valve Tube 12AX7B Amplifier HIFI New Upgrade Version. ShuGuang factory 2024 year new upgrade version with separator plates inside. Type : ECC83 12AX7.