(!!) (Recommended Single) 12AU7A RCA clear top NOS 1973 (11.6ma/12.6ma) (High Gm)
(!!) (Recommended Single) 5814A=12AU7 Hyperlec Brive France (Holland clone) NOS 1970's rebranded National (10.0/11.6ma)
(!!) (Recommended Single) 5814A=12AU7 Hyperlec Brive France (Holland clone) NOS 1970's rebranded National (11.8/12.2ma)
(!!) (SINGLE) 12AU7 RCA long plates D getter NOS 1950's (9.2/9.8ma)
(!!) (Single) 5814WA GE NOS 1962-1963 (9/10.2ma)
(!!) (Single) 5963=12AU7 GE NOS 1981 (9.4/11.4ma)
(!!) (SINGLE) 5963=12AU7 RCA NOS 1965 (10.8/13.2ma)
(!!) (slightly microphonic) 12AU7A Raytheon black ribbed plates "D" getter halo black coated glass 1951 (8.8/9.6ma)
(!!) 12AU7A CBS black plates NOS 1960 era (9.5/11.8ma)
(!!) 12AU7A RCA CANADA NOS "D" getter halo 1950's tip is chipped (10.0/10.4ma)
(!!) 12AU7A RCA clear top used/good 1960's (7.4/8.6ma)
(!!) 12AU7A RCA clear top used/good 1964 (8.2/8.6ma)
(!!) 12AU7A Sylvania Silvertone NOS 1960's (10.6/11.4ma)
(!!) 12AU7A Toshiba Japan rebranded Raytheon gray ribbed plates NOS 1970's (10/11ma) (same Gm)
(!!) 12AU7WA=6189 Sylvania NOS 1960's (8.8/9.0ma)
(!!) 5814A RCA black plates used/good 1964 (7.2/8.4ma)
(!!) 5963=12AU7 RCA NOS 1963 (9.2/9.6ma)
(!!) JRC-12AU7 RCA NOS long gray plates mid-1950's "D" getter (9/11.6ma)
(!) (Best Value Single) ECC82=12AU7 Zaerix East Germany NOS 1970's (12.8/12.0ma) (same Gm)
(!) (Single) 5963=12AU7 GE NOS 1960's (11.6/11.8ma)
