"Ei-RC" - Electronic tubes factory Data Sheet Page 1 of 4 ECC81/12AT7 ECC81 is R.F. Double Triode Quick reference data • • • Anode current Ia=10mA Transcoductance S=5,5mA/V Amplification µ=60 Heating Heating is indirect by AC od DC, with serial or parallel supply. Please note that, in case of serial supply, a current limiting device must be inserted in the heater circuit for limiting the current when switching on. Heater voltage Heater current pins Telephone: FAX: Postal address: Electronic mail: Web site: Vf If 6,3 300 9-(4+5) 12 150 4-5 (V) (mA) +381 18 550 741 +381 18 550 806 Bul. Sv. Cara Konstantina 80-86, 18000 Nis, Yugoslavia [email protected] http://www.eierc.com/rc/default.htm "Ei-RC" - Electronic tubes factory Data Sheet Page 2 of 4 ECC81/12AT7 Dimensions and connections Base: Noval Typical characteristics and operating conditions Telephone: FAX: Postal address: Electronic mail: Web site: Anode voltage Grid voltage Anode current Transconductance Va Vg Ia S 100 -1,0 3,0 3,75 170 -1,0 8,5 5,9 200 -1,0 11,5 6,7 250 (V) -2,0 (V) 10 (mA) 5,5 (mA/V) Amplification µ 62 66 70 60 Internal resistance Ri 16,5 11 10,5 11 (kΩ) +381 18 550 741 +381 18 550 806 Bul. Sv. Cara Konstantina 80-86, 18000 Nis, Yugoslavia [email protected] http://www.eierc.com/rc/default.htm "Ei-RC" - Electronic tubes factory Data Sheet Page 3 of 4 ECC81/12AT7 Limiting - maximal values (design center rating system) Anode voltage Anode dissipation Cathode current Grid voltage Grid resistor (automatic bias) Cathode to heater voltage Telephone: FAX: Postal address: Electronic mail: Web site: Vao Va Wa Ik Vg 550 300 2,5 15 -50 (W) (mA) (V) Rg 1 (MΩ) Vkf 90 (V) (V) +381 18 550 741 +381 18 550 806 Bul. Sv. Cara Konstantina 80-86, 18000 Nis, Yugoslavia [email protected] http://www.eierc.com/rc/default.htm "Ei-RC" - Electronic tubes factory ECC81/12AT7 Telephone: FAX: Postal address: Electronic mail: Web site: +381 18 550 741 +381 18 550 806 Bul. Sv. Cara Konstantina 80-86, 18000 Nis, Yugoslavia [email protected] http://www.eierc.com/rc/default.htm Data Sheet Page 4 of 4