(!!!!) (Best Pair #4) E80CC=6085 Philips Holland branded RTC NOS 1971-1972 (5.6/7.0ma and 5.8/7.3ma)1 pair) E80CC=6085 Philips Holland branded RTC gold pins NOS 1971 1972 1 tube) 5. 6 7. 0ma Gm=2500 2900 1 tube) 5. 8 7. 3ma Gm=2700 2900 (6085 specs are similar to 12AU7, but 6085 has slightly higher plate resistance, lower Gm and lower Mu) (10,000+ hour Dual Triode, very good audio tube, recommended) (Shock and vibration resistant) (Vfil=12. 6V @ 300ma or 6. 3V @ 600ma) Eastern Electric Minimax (sub for 12AU7) Bottlehead headphone amp Audio Note L3