GU-19-1

TETRODE

GENERAL
Cathode: indirectly heated, oxide-coated.
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

BASIC DATA Electrical Parameters
Heater voltage, V:
with series connection	12.6
with parallel connection	6.3
Heater current, A:
with series connection	0.75-0.95
with parallel connection	1.5-1.9
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	18-75
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	7.5-12.5
output	2.8-4.2
transfer, at most	0.8

Limit Operating Values
Heater voltage (AC or DC), V:
with series connection	11.4-13.8
with parallel connection	5.7-6.9
Anode voltage (DC), V	750
Grid 2 voltage (DC), V	250
Cathode-heater 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 Anode-Grid Characteristic Curves (Each Tetrode)

Averaged Anode-Grid Characteristic Curves (Each Tetrode):
U_f = 12.6V; U_a = 550V

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