GU23A
TRIODE
The GU23A triode is used for generation and power amplification in stationary RF equipment.
GENERAL
Cathode: directly heated, carbonized thoriated tungsten.
Envelope: glasstometal.
Cooling: forced (water for anode and leads of cathode and grid, air for stem, envelope and seals).
Height: at most 560 mm.
Diameter: at most 230 mm.
Mass: at most 11 kg.
OPERATING ENVIRONMENTAL CONDITIONS  
Ambient temperature, °C  10 to +55 
Relative humidity at up to 25°C, %  98 
BASIC DATA Electrical Parameters 

Filament voltage, V  12 
Filament current, A  195225 
Mutual conductance (at anode voltage 5 KV anode currents 7 and 12 A), mA/V  4256 
Gain coefficient i at anode voltages 5 and 8 kV and anode current 7 A)  4257 
Anode current (at anode voltage 8 kV ana zero grid voltage), A  34.3 
Interelectrode capacitance, pF:  
input, at most  100 
output, at most  3 
transfer, at most  65 
Limit Operating Values  
Filament voltage, V  11.512 
Anode voltage (DC), kV  11 
Filament starting current, A  315 
Dissipation, kW:  
anode  60 
grid  2.6 
Operating frequency, MHz  26 
Temperature at envelope, stem and seals, °C  150 