GS3B
BEAMPOWER TETRODE
The GS3B beampower tetrode amplifies RF power.
GENERAL
Cathode: indirectly heated, oxidecoated.
Envelope: metalceramic.
Cooling: forced water.
Height: at most 165 mm.
Diameter: at most 121 mm.
Mass: at most 3.5 kg.
OPERATING ENVIRONMENTAL CONDITIONS  
Vibration loads:  
frequency, Hz  1200 
acceleration, m/s²  59 
Multiple impacts:  
acceleration, m/s²  392 
impact duration, ms  10 
Ambient temperature, °C  60 to+70 
Relative humidity at +35 °C,%  98 
BASIC DATA Electrical Parameters 

Heater voltage (AC or DC), V  26 
Heater current, A  3.23.8 
Mutual conductance (at anode voltage 1,500 V, grid 2 voltage 600 V, grid 1 voltage change 10V and anode current 1.5 A), mA/V  3050 
Gain coefficient (grid 1 grid 2) (at anode voltage 2,000 V, grid 2 voltage 500 V, grid 2 voltage change 50 V and anode current 1 A)  813 
Output power (at anode voltage 2,500 V, grid 2 voltage 600 V, anode current 2 A, driving power 250 V, wavelength 50 cm), kW, at least  1.5 
Interelectrode capacitance, pF:  
input  2535 
output, at most  0.07 
transfer  1521 
Limit Operating Values  
Heater voltage (AC or DC), V  2326 
Maximum anode voltage (DC), kV  2.1 
Maximum grid 2 voltage, V  500 
Maximum driving power, W  300 
Maximum dissipation, W:  
anode  2x10^{3} 
grid 1  45 
grid 2  60 
Maximum anode current, A  1.6 
Operating frequency, MHz:  
maximum  800 
minimum  300 
Maximum warm up time, s  120 
Maximum anode temperature, °C  180 
Maximum temperature, °C:  
cathode lead  90 
grids lead  120 
Averaged Anode Characteristic Curves:
U_{f} = 26V; U_{g2}  500V
Averaged AnodeGrid Characteristic Curves:
U_{f} = 26V; U_{a} = 2kV