PSVANE Vacuum Tubes 845B HiFi valve électronique paire assortie

845B is directly heated triode thorium-tungsten cathode, can be used for A1, AB1 class power amplifier.

Filament heating
U f: 10 V
If: 3.25 A

Limit Ratings
Anode voltage: 1250 V
Anode dissipation power: 75 W
Maximum signal output power: 150 W
Maximum anode current: 120 mA

Electrode capacitance
Input capacitance: 6 PF
The output capacitor: 4.5 PF
Cross-Road capacitors: 14.5 PF

Static parameters
Ua: 1250 V
-Ug: 200 V
Ia: 80 mA
Gm: 3 mA / V
ri: 1.7 KΩ
u: -5
RL: 3.4 KΩ
Ug (pk): --69 V
Pout: --- 15 W

Class A1 single-tube amplification:
Ua: 1000 1000 1250 V
-Ug: 145 155 209 V
RL: 6 9 16 KΩ
Ia: 90 65 52 mA
Gm: 3.1 - - mA / V
Ug (pk): 110 148 V
ri: 1.7 1.9 2.1 KΩ
Pout: 24 21 24 W

Push-pull AB1 class amplification:
Ua: 800 1000 1000 1250 V
-Ug: 125 170 175 225 V
RL: 4.5 4.6 4.6 6.6 KΩ
Ia: 80 70 40 40 mA
Ug (pk: 177 240 - - V
Ia (mAx.sig): 170 230 230 240 mA
Pout: 40 75 75 115 W