(!!!!) (Good Value Single 1970) PCC88=7DJ8 Amperex Holland "A" frame NOS 1970 (11.4/12ma)
(!!!!) (Pair - warm and smooth) 12AU7A GE NOS 1979 (7.2/7.8ma and 7.8/7.4ma) (Rogue)
(!!!!) (Pair) 12AU7A GE NOS 1970's (7.0/7.6ma and 6.8/7.6ma) (Rogue)
(!!!!) (Recommended GE Pair) 6BQ5 GE NOS 1969-1970 (64ma and 65ma) (recommended for FIXED-BIAS amp only due to high current)
(!!!!) (Recommended GE Pair) 6FQ7 Zenith by GE NOS 1977 1-3% matched (7.0/7.6m and 6.8/7.5ma)
(!!!!) (Recommended Pair) 6922 Sylvania NOS 1960's (11.6/13.4ma and 12.6/13.6ma)
(!!!!) (Recommended Pair) 6922 Sylvania NOS 1960's (12.0/12.8ma and 11.0/12.4ma)
(!!!!) (Recommended Pair) 6922 Sylvania NOS 1960's-1970 era (10/12.2ma and 10.5/12ma)
(!!!!) (Recommended Pair) 6BQ5 RCA NOS 1960's (50.5ma and 48.2ma)
(!!!!) (Recommended Pair) 6CA4 RFT East Germany (Funkwerk) NOS 1970's (48-49/40 and 48-49/40)
(!!!!) (Recommended Pair) 6CA4 RFT East Germany (Funkwerk) NOS 1970's (47-48/40 and 48-48/40)
(!!!!) (Recommended Pair) 6CA4 RFT East Germany (Funkwerk) NOS 1970's (49-49/40 and 48-49/40)
(!!!!) (Recommended Pair) 6FQ7 Zenith by GE NOS 1977 (6.2/8.0ma and 6.0/8.4ma)
(!!!!) (Recommended Pair) 6FQ7 Zenith by GE NOS 1977 (6.5/10.6ma and 6.7/9.2ma)
(!!!!) (Recommended Pair) 7308 Raytheon JAN NOS 1968 (12.7/16.7ma and 14.2/16.6ma)
(!!!!) (Recommended Pair) ECC83=12AX7 Tungsram Hungary branded IEC Mullard NOS 1982 (1.5/1.6ma and 1.4/1.7ma)
(!!!!) (Recommended Pair) GB-6136=6AU6 Sylvania Gold Brand Gold Pins NOS 1960's (6.3ma and 6.3ma) 1% matched
(!!!!) (Recommended Pair) GB-6136=6AU6 Sylvania Gold Brand Gold Pins NOS 1960's (7.0ma and 6.9ma) 1-2% matched
(!!!!) (Recommended Pair) JAN-5691 Sylvania black plates NOS 1979 (2.1/2.2mA and 2.0/2.2mA) 1-3% matched (Best 6SL7GT sub) (same internals as 5691 red base)
(!!!!) (Recommended Pair) PCC88=7DJ8 Philips Holland NOS 1973 (12.4/10.5ma and 11.0/10.6ma) (Similar sound to 6DJ8 Holland) (sweet sound)