(!!!) (BEST VALUE PAIR) 12AU7A RCA Bell and Howell and RCA clear top used/good 1960's (8.4/9.0ma and 8.0/8.6ma)
(!!) (BEST VALUE SINGLE) 12AU7A RCA clear top used/good 1960's (8.0/9.4ma)
(!!) (Good Value Single) 12AU7 Amperex "Hewlett Packard" Holland "o" getter halo used/good 1968 (8.2/8.4ma)
(!!) (Good Value Single) 12AU7 Amperex Holland "o" getter halo used/like new 1965 no printing 1965 (10.6/10.6ma) 1% section balance
(!!) (Recommended Single) 12AU7A RCA top getter NOS 1970 era (10.2/11ma)
(!!) (Recommended Single) 5814A=12AU7 Hyperlec Brive France (Holland clone) NOS 1970's rebranded National (11.8/12.2ma)
(!!) (slightly microphonic) 12AU7A Raytheon black ribbed plates "D" getter halo black coated glass 1951 (8.8/9.6ma)
5963 RCA black ribbed plates" and D getter halo NOS 1957 (sold out - read review)
(!!!) (Best Value Single 1958) 12AU7=ECC82 Brimar made for Arkay England ribbed plates 1958 (8.2/10.8ma)
(!) 6189=12AU7A GE NOS 1975 (9.6/10ma) 1-2% section balance
(!!) 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 Toshiba Japan rebranded Raytheon gray ribbed plates NOS 1970's (10/11ma) (same Gm)
(!!) 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)
(!!!) (Smooth Single) ECC82=12AU7 Ediswan Valve by Brimar England NOS ribbed plates large "O" getter halo 1962 (11.4/11.8ma)
(!!!) (Best Value Single) ECC82=12AU7 Philips Miniwatt Holland ribbed plates used/like new 1963 (9.4/9.8ma)
