(!!!!) (Best Pair #1) 6CA4 RFT East Germany (Funkwerk) NOS 1970's (50/40 and 50/40 x 2 tubes) 1% matched
(!!!!) (Best Pair #2) 6CA4 RFT East Germany (Funkwerk) NOS 1970's (49/40 and 50/40 x 2 tubes) 1% matched
(!!!!) (Best Value Quad) EZ81=6CA4 RFT East Germany (Funkwerk) NOS 1970's (1 quad)
(!!!!) (Recommended Pair) 6CA4 RFT East Germany (Funkwerk) NOS 1970's (48-48/40 and 49-49/40)
(!!!!) (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 (48-48/40 and 48-49/40)
(!!!!) (Recommended Pair) 6CA4 RFT East Germany (Funkwerk) NOS 1970's (49-49/40 and 48-49/40)
(!!!) (Best Value Single) CV4003=12AU7 RFT East Germany NOS 1974 (12.2/12.8ma)
(!) (Best Value Single) ECC82=12AU7 Zaerix East Germany NOS 1970's (12.8/12.0ma) (same Gm)
PCC85=9AQ8 Funkwerk RFT Germany NOS 1958 in white box (12.6/12.4ma)
PCC85=9AQ8 Funkwerk RFT Germany NOS 1958 in white box (13.5/16.0ma)
