GS35B
TRIODE
The GS35B triode provides continuouswave generation in externalfeedback selfsustained oscillators and amplifiers at up to 1,000 MHz, in circuits with a common point at grid.
GENERAL
Cathode: indirectly heated, oxidecoated.
Envelope: metalceramic.
Cooling: forced air.
Height: at most 177 mm.
Diameter: at most 100.2 mm.
Mass: at most 2.8 kg.
A  anode; C  grid; P  heater; KP  cathode and heater
OPERATING ENVIRONMENTAL CONDITIONS  
Vibration loads:  
frequency range, Hz  50200 
acceleration, m/s²  59 
Multiple impacts with acceleration, m/s²  343 
Linear loads with acceleration, m/s²  88 
Lowest ambient temperature, °C  60 
Relative humidity at up to +40 °C, %  98 
BASIC DATA Electrical Parameters 

Heater voltage, V  12.6 
Heater current, A  2.653.25 
Mutual conductance (at anode voltage 2.5 kV, grid voltage change 1 V, anode current 0.4 A), mA/V  2540 
Penetration factor (at anode voltage 2.5 kV, grid voltage change 200 V, anode current 0.4 A), %  0.81.2 
Operating point (negative grid voltage at anode voltage 2.5 kV, anode current 0.4 A), V  126 
Interelectrode capacitance, pF:  
input  1824 
output, at most  0.12 
transfer  3.85.0 
Warm up time, s, at most  90 
Output power, W:  
at anode voltage 2.5 kV, anode current 0.7 A, wavelength 60 cm, at least  800 
at anode voltage 2.2 kV, anode current 0.8 A, wavelength 30 cm, at least  350 
Output power over 500 h of service (at anode voltage 2.5 kV, anode current 0.7 A, wavelength 60 cm), W, at least 
650 
Limit Operating Values  
Heater voltage, V  11.913.3 
Anode voltage, kV:  
DC  3 
instantaneous value  6 
Grid voltage, V  400 to +120 
Cathode current, A  1.4 
Dissipation, W:  
anode  1.5x10³ 
grid  26 
Temperature, °C:  
anode  200 
grid and cathode leads  120 
Standard Operating Conditions  
Condition I  Condition II  
Heater voltage, V  12.6  12.6 
Anode voltage, kV  2.2  2.5 
Anode current, A  0.8  0.7 
Output power, W, at least  350  800 
Wavelength, cm  30  60 
Averaged Anode and GridAnode Characteristic Curves:
U_{f} = 12.6V
_____ anode;
_ _ _ gridanode
Characteristic Curves Showing Output Power versus Anode Current:
U_{f} = 12.6V; L = 30cm
Characteristic Curves Showing Output Power versus Anode Current:
U_{f} = 12.6V; L = 60cm
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