GU46
PENTODE
The GU46 pentode is used in separately or selfexcited oscillator circuits at up to 60 MHz and as linear power amplifiers in RF transmitters
GENERAL
Cathode: directly heated, carbonized thoriated tungsten.
Envelope: glass.
Height: at most 230 mm.
Diameter: at most 140 mm.
Mass: at most 900 g
OPERATING ENVIRONMENTAL CONDITIONS  
Ambient temperature, °C  10to+55 
Relative humidity at up to +25 °C, %  98 
BASIC DATA Electrical Parameters 

Filament voltage, V  8.3 
Filament current, A  13.516 
Mutual conductance (at anode voltage 1 kV, grid 2 voltage 600 V, grid 1 voltage change ±5 V, anode current 500 mA), mA/V  7.511.5 
Gain coefficient (grid 1 grid 2) (at anode voltage 1 kV, grid 2 voltage 500600 V, anode current 500 mA)  46 
Bias voltage, V  4876 
Interelectrode capacitance, pF:  
input, at most  2633 
output, at most  6.511 
transfer, at most  0.15 
Output power, W, min.:  
at anode voltage 2.5 kV, grid 2 voltage 600 V, grid 1 voltage 120 V, anode current 0.48 A, at frequency 60 MHz  700 
over 1,000 h of service  600 
Limit Operating Values  
Filament voltage, V  7.98.7 
Anode voltage, V  3x10³ 
Grid 2 voltage, V  650 
Filament starting current, A  23 
Dissipation, W:  
anode  500 
grid 3  4 
grid 2  45 
grid 1  4 
Operating frequency, MHz  60 
Envelope temperature, °C  300 
Temperature at seals, °C  220 
Averaged Anode Characteristic Curves:
U_{f} = 8.3V; U_{g2} = 0.5kV; U_{g3} = 0
Averaged Anode Characteristic Curves:
U_{f} = 8.3 V; U_{g2} = 0.6kV; U_{g3} = 0
Averaged Grid 2Anode Characteristic Curves:
U_{f} = 8.3V; U_{g2} = 0.5kV; U_{g3} = 0
Averaged Grid 2Anode Characteristic Curves:
U_{f} = 8.3V; U_{g2} = 0.6kV; U_{g3} = 0
Averaged Grid 1Anode Characteristic Curves:
U_{f} = 8.3 V; U_{g3} = 0
_____ at U_{g2} = 0.6kV;
_ _ _ at U_{g2} = 0.5kV
Averaged Characteristic Curves:
U_{f} = 8.3V; U_{g2} = 1 kV; U_{g3} = 0;
_____ anode;
_ _ _ grid