(!!!) 6GM8=ECC86 SIEMENS HOLLAND NOS 1970 (3.9/4.4ma)
(!!) (2nd Best Pair) ECC40 Philips NOS made by La Radiotechnique, Chartres/France 1969 (6.1/6.7ma and 6.3/6.9ma) 1-3% matched
(!!) (Best Pair) ECC40 Philips NOS made by La Radiotechnique, Chartres/France 1969 (6.0/6.1ma and 6.0/6.1ma) 1-2% matched
(!!) (Best Single) E80F=6084 Philips SQ NOS Gold Pins 1971 (3.5ma)
(!!) (Best Single) EC92=6AB4 Siemens Halske Germany NOS 1971 (10.2ma)
(!!) (Best Value Pair) ECC84=6CW7 Ultron East Germany by RFT 1970's 1-3% matched (9.0/9.6ma and 9.0/9.3ma)
(!!) (Good Value Pair) ECC85=6AQ8 RCA Japan by Hitachi 1970's (10/15ma and 10.4/14.4ma)
(!!) (Good Value) 12AT7=ECC81 Siemens Halske Germany NOS 1970 (10.3/11.0ma)
(!!) (PAIR) E81L=6686 Siemens made By Valvo, Hamburg, Germany NOS 1968 (13.4ma and 13.8ma)
(!!) (PAIR) E81L=6686 Siemens made By Valvo, Hamburg, Germany NOS 1968-1972 (18.4ma and 18.5ma)
(!!) (Recommended Pair) ECC40 Philips NOS made by La Radiotechnique, Chartres/France 1969 (5.5/5.6ma and 5.5/6.0ma)
(!!) (Recommended Pair) ECC40 Philips NOS made by La Radiotechnique, Chartres/France 1969 (5.8/6.6ma and 6.0/6.6ma)
(!!) (Recommended Pair) ECC40 Philips NOS made by La Radiotechnique, Chartres/France 1969 (6.0/6.5ma and 6.1/6.8ma) 1-3% matched
(!!) (Recommended Pair) ECC40 Siemens NOS made by La Radiotechnique, Chartres/France 1967-1972 (6.1/6.4ma and 6.0/6.0ma)
(!!) (Recommended Single) 5751 Siemens Halske triple mica branded Philips SQ like new 1968 (2.4/2.4ma) 1% section balance
(!!) (Recommended Single) E81CC=12AT7 Siemens Germany double mica NOS 1975 (11.6/13.6ma) (strong Ma and Gm)
(!!) (Recommended Single) ECC85 Siemens Germany NOS rebranded RCA 1969 (16.5/14.5ma)
(!!) (Single) PCC88=7DJ8 Philips Holland 1973 (9.5/10.6ma)
(!!) EC92 Siemens Halske NOS rebranded Philips Import 1969 "O" getter halo (9.2ma)
(!!) EC92 Siemens Halske NOS rebranded Philips Miniwatt 1968 "O" getter halo (6.8ma)
