This part is a kind of semiconductor called ECC83.

Function of this product has Double Triode.

Manufacturers : Ei-RC

Image and pinout :

Some of the text within the PDF file :

"Ei-RC" - Electronic tubes factory ECC83/12AX7 ECC83 is A.F. Double Triode Data Sheet Page 1 of 4 Quick reference data • Anode current Ia=1,2mA • Transcoductance S=1,6mA/V • Amplification µ=100 Heating Heating is indirect by AC od DC, with serial or parallel supply. Heater voltage Heater current pins Vf 6,3 12,6 (V) If 300 150 (mA) 9-(4+5) 4-5 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 eirc@eierc.com http://www.eierc.com/rc "Ei-RC" - Electronic tubes factory ECC83/12AX7 Dimensions and connections Base: Noval Data Sheet Page 2 of 4 Typical characteristics and operating conditions Anode voltage Grid voltage Anode current Transconductance Amplification Internal resistance [ ... ]

ECC83 PDF Datasheet Download