Heater Heating:
Uh...............................................................6.3 V
Ih...............................................................1.6 A

Maximum Ratings:
Anode Voltage...................................................800 V
Second Grid Voltage............................................600 V
First Grid Voltage..............................................-200 V
Anode Dissipation Power........................................42 W
Second Grid Dissipation Power..................................8 W
Anode plus Second Grid Dissipation Power.....................46 W
Cathode Current..................................................230 mA
Heater-Cathode Voltage........................................200 V
Bulb Temperature................................................250 °C

First Grid Resistance:
For Self-Bias:
--- When Pa + Pg2 ≤ 35W....................................0.47 MΩ
--- When Pa + Pg2 > 35W.....................................0.27 MΩ

For Fixed Bias:
--- When Pa + Pg2 ≤ 35W.....................................0.22 MΩ
--- When Pa + Pg2 > 35W......................................0.10 MΩ

Inter-electrode Capacitance:
                                      Tetrode Connection/Triode Connection:
Input Capacitance............................................16 / 9.3 PF
Output Capacitance...........................................12/17 PF
Cross Capacitance.............................................1.2 /7.9 PF

Static Parameters:
Tetrode Connection:
Ua...............................................................250 V
Ug2..............................................................250 V
Ia...............................................................140 mA
Ig2 (approx).....................................................3 mA
Ug1 (approx)...................................................-15 V
Gm...............................................................12 mA/V
ri.................................................................12 KΩ
μg1-g2...........................................................8

Triode Connection:
Ua.g2............................................................250 V
Ia+g2............................................................143 mA
Ug1 (approx)...................................................-15 V
Gm...............................................................12 mA/V
ri.................................................................670 Ω
μ.................................................................8