GU30
DOUBLE BEAMPOWER TETRODE
The GI30 double beampower tetrode is used in pulseoperation circuits of RF equipment.
GENERAL
Cathode: indirectly heated, oxidecoated.
Envelope: glass, nobase.
Height: at most 110 mm.
Diameter: at most 61 mm.
Mass: almost 125g.
1  heater; 2  grid 2; 3  common grid 2; 4  cathode and beamforming plates; 5,7 heater; 6  grid 1 of first tetrode; A1  anode of first tetrode; A2  anode of second tetrode
OPERATING ENVIRONMENTAL CONDITIONS  
Vibration loads:  
frequencies, Hz  20200 
acceleration, m/s²  59 
Multiple impacts with acceleration, m/s²  343 
Single impacts with acceleration, m/s²  1,470 
Linear loads with acceleration, m/s²  240 
Ambient temperature, °C  60 to+135 
Relative humidity at up to +40 °C, %  98 
BASIC DATA Electrical Parameters 

Heater voltage, V  12.6 
Heater current, A  11.25 
Anode current (at anode voltage 250 V, grid 1 voltage 11 V of first tetrode, grid 1 voltage 100 V of second tetrode, grid 2 voltage 175 V), mA  3582 
Grid 2 current (at anode voltage 250 V, grid 1 voltage 11 V of first tetrode, grid 1 voltage 100 V of second tetrode, grid 2 voltage 175 V), mA, at most  10 
Interelectrode capacitance, pF:  
input  1317 
output  59 
transfer, at most  0.1 
Warm up time, s, at most  50 
Peak anode current over 1,000 h of service, A, at least  7.5 
Limit Operating Values  
Heater voltage, V  11.313.9 
Anode voltage, kV  5 
Grid voltage, V  850 
Peak anode current, A  9 
Dissipation, W:  
anode  15 
grid 2  3 
Warm up time, s, at last  60 
Envelope temperature, °C  200 
Characteristic Curves Showing Anode Dissipation P_{a max} versus Ambient Temperature (at bulb temperature T_{b} 200 °C)