Amplifiers
6550 Vacuum Tube Replace KT88 KT120 EL34 KT66 KT77 KT150 KT100 Audio Valve Electron Tube Amplifier Kit DIY
UH 6.3 V
IH 1.6 A
Static parameters
Quadrode connection method
Ua 250V
Ug2 250V
a 140mA
Ig2 12mA
Gm 11mA/V
Ri...... 12K
RL...... 1.5K
Pout 12.5W
Dtot 7 %
Recommended working status (reference value)
Single tube A1 class amplification
Ua (b)...... 400 V
Ug2 225V
-Ug1...... 16.5V
Ia (o)...... 87 mA
Ia (max. sig)...... 105 mA
Ig2 (0)...... 4mA
Ig2 (max. sig)...... 18mA
Gm 9
Ri...... 27 k
Pout20W
Dtot13 .5%
Push pull A1 class amplification
Fixed bias voltage Self bias voltage
Ua(b) 400 600 400 V
Ug2275 300 300 V
-Ug23v31v RK=140 /
RL 3.554.5 K
Ia(o) 2×902×582×83 mA
Ia(max.sig) 2×135 2×1362×95mA
Ig2(0) 2×4.52×22×3.6 mA
Ig2(max.sig) 2×222×20.52×19.5mA
Pout55 100 41 W
Dtot 32.5 4 %
Pushing AB1 class amplification, transistor connection
Self bias voltageFixed bias voltage
Ua.g2(b) 400 400 V
-Ug 40v RK=525 /
RL(a-a) 4 4 K
~U(g1-g1.pk) 7878 V
Ia+g2(0) 2×76 2×76 mA
Ig+Ig2(max.sig) 2×80 2×80 mA
Pout 1717 W
Dtot 1.5 1.5 %
Push pull AB1 class amplification (self bias)
Ua(b)400 V
Ug2 310 V
Rk 140
RL 5 K
~u(g1-g1.pk)43 V
Ia(o)2X 85 mA
Ia(max.sig)2X92.5 mA
Ig2(0) 2X5 mA
Ig2(max.sig)2X12.5mA
Pout40 W
Dtot0.7 %
Push pull AB1 class amplification (fixed bias)
Ua(b) 400 450 600 V
Ug2270 310 300 V
-Ug23 29.532.5V
RL 3.53.55 K
~u(g1-g1.pk)46 58 65 V
Ia(o) 2×852×752×50mA
Ia(max.sig) 2×137.5 2×1472×135mA
Ig2(0) 2×4.52×22×2.5 mA
Ig2(max.sig) 2×17.52×192×16.5mA
Pout6070 1001 W
Dtot 0.61.53 %
Pushover superlinear amplification
A1 ClassAB1 Class
Ua(b) 390 450 V
Ug2 395 450 V
-Ug RK=200 48v /
RL5.6 4 K
~U(g1-g1.pk) 70 96 V
Ia(o) 2×85 2×75mA
Ia(max.sig) 2×87 2×132.5mA
Ig2(0) 2×6.3 2×6mA
Ig2(max.sig) 2×11.52×19mA
Pout3470W
Dtot 1.52.4%

High-concerned chemical : None
Channels : 1
Model Number : PSVANE 6550
Maximum Power Per Channel : NO POWER