GS15B
TETRODE
The GS15B tetrode is used as a RF oscillator and amplifier in continuous operation in groundedgrid circuits.
GENERAL
Cathode: indirectly heated, oxidecoated, dispenser.
Envelope: metalceramic with ring leads.
Cooling: forced air.
Height: at most 69 mm.
Diameter: at most 37.1 mm.
Mass: at most 140 g.
KP  cathode and heater; P  heater; C1  grid; C2  grid 2; A  anode
OPERATING ENVIRONMENTAL CONDITIONS  
Vibration loads:  
frequency, Hz  51,400 
acceleration, m/s²  98 
Multiple impacts with acceleration, m/s²  1,470 
Linear loads with acceleration, m/s²  2,940 
Ambient temperature, °C  60 to +100 
Relative humidity up to +40 °C, %  98 
BASIC DATA Electrical Parameters 

Heater voltage (AC or DC), V  6.3 
Heater current, A  1.852.2 
Anode voltage (DC), V  900 
Grid 2 voltage (DC), V  250 
Mutual conductance (at grid 1 voltage reduction by 1 V and anode current 0.2 A), mA/V, at least  9 
Grid 1 inverse current (at anode current 0.2 A), µA, at most  20 
Warm up time (at anode voltage 1.5 kV, grid 2 voltage 300 V, anode current 0.24 A, drive power 15 W at wavelength 30 cm), s, at most  60 
Oscillator output power in amplification mode (at anode voltage 1.5 kV, grid 2 voltage 300 V, anode current 0.24 A, drive power 15 W at wavelength 30 cm), W, at least  160 
Interelectrode capacitance, pF:  
grid 1cathode  68.5 
grid 2anode  1.52.3 
Limit Operating Values  
Heater voltage (AC or DC), V:  
maximum  6.6 
minimum  6 
Maximum anode voltage (DC), kV  1.37 
Maximum grid 2 voltage (DC), V  300 
Grid 1 voltage, V:  
maximum  0 
minimum  100 
Dissipation, W:  
anode  200 
grids  3 
Maximum anode current, A  0.24 
Grid 2 current, mA:  
maximum  10 
minimum  10 
Grid 1 current, mA:  
maximum  40 
minimum  0 
Maximum drive power, W  12 
Minimum oscillator output power, W  112.5 
Minimum wavelength, cm  30 
Maximum temperature at envelope and leads, °C  200 
Averaged Characteristic Curves:
U_{f} = 6.3V; U_{g2} = 300V;
_____ anode;
_ _ _ gridanode
Averaged Characteristic Curves:
U_{f} = 6.3V; U_{g2} = 1.5kV;
_____ anodegrid;
   grid
Averaged Characteristic Curves Showing Oscillator Output Power versus Anode Voltage:
U_{f} = 6.3V; U_{g2} = 300V; P_{in} = 15W; L = 30 cm
Averaged Characteristic Curves Showing Oscillator Output Power versus Input Power:
U_{f} = 6.3V; U_{g2} = 300V; I_{a} = 240 mA; L = 30 cm;
_____ oscillator output power (P);
_ _ _ gain coefficient