(!!!) (BEST VALUE PAIR) PCC88=7DJ8 RFT East Germany branded Tesla NOS 1980 era (11.8/12ma and 11.2/12.4ma)
(!!!) (BEST VALUE PAIR) PCC88=7DJ8 RFT East Germany branded Tesla NOS 1980 era (13.0/14.5ma and 13.2/13.4ma)
(!!!) (Best Value Single) ECC85=6AQ8 Philips Holland NOS 1975 (10/17ma)
(!!!) (BEST VALUE SINGLE) PCC88=7DJ8 RFT East Germany branded Tesla NOS 1980 era (15.2/15.0ma)
(!!!) (Recommended Pair) ECC85=6AQ8 RCA Heerlen Holland NOS 1968 (21/16.5ma and 18.5/15.5ma) (close Gm)
(!!!) (Recommended Single) 6KG6A RCA JAPAN NOS original boxes 1970's (142ma)
(!!!) (Recommended Single) 6KG6A Westinghouse JAPAN NOS 1973 (116ma)
(!!!) (Recommended Single) ECC85=6AQ8 Philips Holland NOS 1970's (11.6/14.2ma)
(!!!) (Recommended Single) ECC85=6AQ8 Philips Holland NOS 1970's (13.5/14.4ma)
(!!!) (Recommended Single) PCC88=7DJ8 Siemens Germany NOS 1972 (11.5/12.2ma)
(!!!) (Recommended Single) PCC88=7DJ8 Telefunken Germany <> bottom NOS 1968 (11.5ma/16.2ma) (Similar to 6DJ8 Telefunken)
(!!) (Best Siemens Single) ECC85=6AQ8 RCA made by Siemens Germany NOS 1969 (16.0/15.2ma)
(!!) (Good Value Pair) ECC85=6AQ8 RCA Japan by Hitachi 1970's (10/15ma and 10.4/14.4ma)
(!!) (Recommended Single) ECC85 Siemens Germany NOS rebranded RCA 1966 (10.3/11.8ma)
(!!) ECC85=6AQ8 RCA Canada NOS 1970's (12.6/11.0ma)
(!) (Recommended Single) PCC88=7DJ8 Tesla NOS 1968 (12.5/15.5ma)
(!) (Recommended Single) PCC88=7DJ8 Tesla NOS 1968 (13.2/14.0ma)