GS36B
TETRODE
The GS36B tetrode is designed for power amplification in distributedgain amplifiers and singlesideband signal amplifiers at frequencies up to 75 MHz, and for power amplification at up to 500 MHz in RF equipment.
GENERAL
Cathode: indirectly heated, oxidecoated.
Envelope: metalceramic.
Cooling: forced air.
Height: at most 67 mm.
Diameter: at most 51 mm.
Mass: at most 220 g.
1  grid; 2, 4, 6, 8  cathode; 3, 7  heater; 5  no connection; C1  grid 1; C2  grid 2; A  anode; I  contact surfaces
OPERATING ENVIRONMENTAL CONDITIONS  
Vibration loads:  
frequencies, Hz  180 
acceleration, m/s²  49 
Multiple impacts with acceleration, m/s²  147 
Ambient temperature, °C  10 to +55 
Relative humidity at up to +25 °C, %  98 
BASIC DATA Electrical Parameters 

Heater voltage (AC or DC), V  6.3 
Heater current, A  2.953.35 
Mutual conductance (at anode voltage 1,000 V, grid 2 voltage 325 V, grid 1 voltage change 2.5 V, anode current 400 mA), mA/V  2034 
Anode current (at anode voltage 350 V, grid 2 voltage 325 V), mA, at least  400 
Negative bias voltage (at anode voltage 1,000 V, grid 2 voltage 325 V, anode current 400 mA), V, (absolute value), at most  722 
Negative cutoff voltage (at anode voltage 2,000 V, grid 2 voltage 325 V, anode current 20 mA), V (absolute value), at most  60 
Interelectrode capacitance, pF:  
input  1830 
output  59 
transfer, at most  0.08 
Output power under conditions of class AB_{1} (at anode voltage 2,000 V, grid 2 voltage 325 V, anode current at most 25 mA, grid 1 current 2x10^{3} mA, frequency 0.11 MHz), W, at least  250 
Output power under conditions of class Â (at 500 MHz, heater voltage 6.3 V, anode voltage 2,000 V, grid 2 voltage 325 V, anode current (DC component) 225 mA, grid 2 current (DC component) about 5 mA, grid 1 current (DC component) at most 0), W, at most  200 
Relative level of combination components (at heater voltage 6.3 V, anode voltage 2,000 V, grid 2 voltage 325 V), dB, max.:  
3rdorder components  30 
5thorder components  30 
Standard power in the mode of singlesideband signal amplification with low nonlinear distortion (at heater voltage 6.3 V, anode voltage 2,000 V, grid 2 voltage 250 V, negative bias voltage 16 V, quiescent anode current 200 mA, anode current (DC component) about 280 mA, grid 2 current (DC component) about 7 mA, grid 1 current not above 0, relative level of combination components 37 dB of 3rd order and 40 dB of 5th order), W  about 200 
Output power under conditions of class AB_{1} over 1,000 h of service, W, at least  200 
Limit Operating Values  
Heater voltage (AC or DC), V  6.06.6 
Anode voltage, V:  
DC  2,100 
instantaneous value  4,000 
Grid 2 voltage (DC), V  325 
Negative grid 1 voltage (DC, absolute value), V  60 
Cathode current (DC component) under conditions of class B, mA  400 
Dissipation, W:  
anode  400 
grid 2  8 
grid 1  0.2 
Operating frequency, MHz  500 
Temperature at envelope (hottest point), °C  200 
Averaged AnodeGrid and Grid Characteristic Curves:
U_{f} = 6.3V; U_{g2} = 250V;
_____ I_{a};
   I_{g2}
Averaged AnodeGrid and Grid Characteristic Curves:
U_{f} = 6.3V; U_{g2} = 275V;
_____ I_{a};
   I_{g2}
Averaged AnodeGrid and Grid Characteristic Curves:
U_{f} = 6.3V; U_{g2} = 300V;
_____ I_{a};
   I_{g2}
Averaged AnodeGrid and Grid Characteristic Curves:
U_{f} = 6.3V; U_{g2} = 325V;
_____ I_{a};
   I_{g2}
Averaged GridAnode Characteristic Curves:
U_{f} = 6.3V; U_{g2} = 250V
Averaged GridAnode Characteristic Curves:
U_{f} = 6.3V; U_{g2} = 275V
Averaged GridAnode Characteristic Curves:
U_{f} = 6.3V; U_{g2} = 300V
Averaged GridAnode Characteristic Curves:
U_{f} = 6.3V; U_{g2} = 325V
Averaged Anode Characteristic Curves:
U_{f} = 6.3V; U_{g2} = 250V;
_____ I_{a};
— — — P_{a max}
Averaged Anode Characteristic Curves:
U_{f} = 6.3V; U_{g2} = 275V;
_____ I_{a};
— — — P_{a max}
Averaged Anode Characteristic Curves:
U_{f} = 6.3V; U_{g2} = 300V;
_____ I_{a};
— — — P_{a max}
Averaged Anode Characteristic Curves:
U_{f} = 6.3V; U_{g2} = 325V;
_____ I_{a};
— — — P_{a max}