GU191
TETRODE
GENERAL
Cathode: indirectly heated, oxidecoated.
Envelope: glass, with base.
Height: at most 100 mm.
Diameter: at most 40 mm.
Mass: at most 100 g.
1  grid 1 of first tetrode; 2  grid 2; 3  cathode and beam forming plates; 4  heater (centre tap); 5  grid 1 of second tetrode; 6  heater; 7  cathode; 8  heater: A1  anode of first tetrode  top lead; A2  anode of second tetrode  top lead
OPERATING ENVIRONMENTAL CONDITIONS  
Vibration loads:  
frequencies, Hz  1200 
acceleration, m/s²  49 
Multiple impacts with acceleration, m/s²  392 
Relative humidity at up to 35°C, %  98 
BASIC DATA Electrical Parameters 

Heater voltage, V:  
with series connection  12.6 
with parallel connection  6.3 
Heater current, A:  
with series connection  0.750.95 
with parallel connection  1.51.9 
Mutual conductance (at anode voltage 350 V, grid 2 voltage 250 V, grid 1 changing voltage of first tetrode and grid 1 voltage 100 V of second tetrode, anode current 40 mA), mA/V, at least  4 
Anode current (at anode voltage 350 V, grid 2 voltage 250 V, grid 1 voltage 17 V of first tetrode, grid 1 voltage 100 V of second tetrode), mA  1875 
Output power at 500 MHz (at anode voltage 350 V, grid 2 voltage 250 V, voltage 55 V of grids 1, grid 2 currents not above 26 mA, anode current 240 mA), W, at least  40 
Interelectrode capacitance, pF  
input  7.512.5 
output  2.84.2 
transfer, at most  0.8 
Limit Operating Values  
Heater voltage (AC or DC), V:  
with series connection  11.413.8 
with parallel connection  5.76.9 
Anode voltage (DC), V  750 
Grid 2 voltage (DC), V  250 
Cathodeheater voltage (DC), V  ±100 
Cathode current (DC component), mA  280 
Dissipation, W:  
anode  40 
grid 2  60 
grids 1  1.0 
Operating freguency, MHz  500 
Bulb temperature, °C  250 
Averaged Anode Characteristic Curves (Each Tetrode)
U_{f} = 12.6V; U_{g2} = 200V;
__ . __ P_{a max}
Averaged Anode Characteristic Curves (Each Tetrode):
U_{f} = 12.6V; U_{g2} = 250V;
__ . __ P_{a max}
Averaged AnodeGrid Characteristic Curves (Each Tetrode)
Averaged AnodeGrid Characteristic Curves (Each Tetrode):
U_{f} = 12.6V; U_{a} = 550V