KT88
KT88 is beam tetrode manufactured by JJ.
KT88 max 52,0 max 110,0 max 125,0
Base: OCTAL Uf = 6,3 V If = 1,6 A
Typical Characteristics:
Ua = 250
U = 250 g2
I = 140 a
I = max. 7 g2
Ug1 =
-15
S = 11,5
V V m A m A V m A/V
Ri = µ=
-g1-g2
12 kΩ 8
Triode Connected
U = a, g2
I= a+g2
Ug1 =
-15
S = 12
Ri = 670
µ=
V m A V m A/V Ω
Limiting Values:
Ua = 800 V
U = 600 V g2
U = 600 V a, g2
U = -200 V g1
Wa = 42 W
Wg2 =
8W
W = a+g2 46 W
I = 230 m A k
U = 250 V k/f
Rg1-k (cathode bias)
W ≤35 W 470 kΩ a+g2
W >35 W 270 kΩ...
