Medical 811

Heater Voltage:
Uf: ............................................... 6.3 V
If: ................................................. 4 A
Maximum Ratings:
Anode Voltage: ................................... 1250 V
Anode Current: .................................. 125 mA
Anode Dissipation: ............................. 40 W
Grid Current: ................................... 50 mA
Operating Frequency and Anode Voltage:
When the operating frequency is above 30 MHz, the anode operating voltage and anode input power will be appropriately adjusted downward according to the following table:
| Operating Frequency (MHz) | Anode Voltage and Anode Input Power |
|--------------------------------|--------------------------------------------|
|                      60                     |                             89%                             |
|                      80                     |                             70%                             |
|                     100                    |                              55%                             |
During continuous operation, the anode is not allowed to have a faint red glow. During intermittent operation, the anode can only have a barely perceptible faint red glow.
Inter-Electrode Capacitance:
Input Capacitance: ............................. 5.5 pF
Output Capacitance: .......................... 0.6 pF
Transconductance Capacitance: ............. 5.5 pF
Static Parameters:
Ua: ................................................. 2000 V
Ug: ................................................ -2 V
Ia: ................................................ 26 mA
μ (at Ia = 20 mA): ............................. 160