GU92 B
TETRODE
The GU92B tetrode is used in RF power amplifier circuits in stationary generalpurpose RF equipment, including television transmitters.
GENERAL
Cathode: directly heated, carbonized thoriated tungsten.
Envelope: metal ceramic.
Cooling: forced air.
Working position: upright, anode down.
Height: at most 200 mm.
Diameter: at most 190 mm.
Mass: at most 15 kg.
A  anode; K1, K2  cathode; C1  grid 1; C2  grid 2
OPERATING ENVIRONMENTAL CONDITIONS  
Vibration loads:  
frequencies, Hz  160 
acceleration, m/s²  9.8 
Multiple impacts with acceleration, m/s²  147 
Ambient temperature, °C  10 to +55 
Relative humidity at up to +25 °C without moisture condensation, %  98 
BASIC DATA Electrical Parameters 

Filament voltage (AC or DC), V  9.5 
Filament current, A  130160 
Peak anode current (at anode voltage 2 kV, grid 2 voltage 1 kV, grid 1 voltage 120 V), A  22 
Mutual conductance (at anode voltage 2 kV, grid 2 voltage 1 kV and anode currents 6 and 8 A), mA/V, at least  60 
Negative grid 1 cutoff voltage, absolute value (at anode voltage 8 kV, grid 2 voltage 1 kV, anode current 0.3 A), V at most  350 
Static amplification factor (at anode voltage 2 kV, grid 2 voltages 1 and 1.2 kV, anode current 6 A), at least  4 
Output power at black level (at bandwidth 8 MHz, frequency up to 250 MHz), kW, at least  15 
Output power at sync pulse level (at bandwidth 8 MHz, frequencies up to 250 MHz), kW, at least  25 
Interelectrode capacitance in commongrid circuit, pF:  
input  120 
output  24 
transfer  0.15 
Limit Operating Values  
Filament voltage (AC or DC), V  10 
Filament starting current (peak value,) A  300 
Anode voltage (DC), kV  8 
Grid 2 voltage, kV  1.2 
Dissipation, W:  
anode  25103 
grid 2  250 
grid 1  120 
Operating frequency, MHz  250 
Envelope temperature at hottest point, °C  250 
Averaged AnodeGrid Characteristic Curves:
U_{f} = 9.5V; U_{g2} = 1.2kV
Averaged Grid Characteristic Curves:
U_{f} = 9.5V; U_{g2} = 1.2kV
Averaged Grid Characteristic Curves:
U_{f} = 9.5V; U_{g2} = 1.2kV