ECC83

12AX7, 7025
R.F. DOUBLE TRIODE

DIMENSIONS AND CONNECTIONS:

base: NOVAL

Uf = 6,3 V 12,6 V
If = ca .300 mA 150 mA

TYPICAL CHARACTERISTIC:

Ua = 250 V
Ug = -2 V
Ia = 1,2 mA
S = 1,6 mA/V
Ri = 62,5 kOhm
= 100

OPERATING CHARACTERISTICS:

Resistance - coupled amplifier cathode grid base

Ub = 250 400 250 400 250 400 V
Ra = 47 47 100 100 220 220 kOhm
Rg = 150 150 330 330 680 680 kOhm
Rk = 1,2 0,68 1,5 0,82 2,7 1,2 kOhm
Ia = 1,18 2,45 0,86 1,72 0,48 1,02 mA

LIMITING VALUES:

Ua = 300 V
Wa = 1 W
Ik = 8 mA
Ug = -50 V
Rg = 2,2 MOhm
Uk/f = 180 V
Rk/f = 150 kOhm

CAPACITANCES:

system I system II
Cg/k = 1,6 1,6 pF
Ca = 0,33 0,33 pF
Cg/a = 1,7 pF 1,7 pF