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GU-34B-1

TETRODE

The GU-34B-1 tetrode is used for wideband power amplification at frequencies up to 250 MHz in RF equipment.

GENERAL
Cathode: indirectly heated, oxide-coated.
Envelope: glass-to-metal.
Cooling: forced air.
Height: at most 126 mm.
Diameter: at most 94 mm.
Mass: at most 1 kg.

gu-34b-1(1)1.jpg
KP - cathode and heater; P - heater; C1 - grid 1; C2 - grid 2; A - anode; I-contact surfaces

OPERATING ENVIRONMENTAL CONDITIONS
Ambient temperature, °C -10 to +55
Relative humidity at up to +25 °C, % 98

BASIC DATA
Electrical Parameters
Heater voltage, V 12.6
Heater current, A 3.6-4.4
Mutuai conductance (at anode voltage 650 V, grid 2 voltage 400 V, anode current 1 A), mA/V 60-80
Cutoff voltage (at anode voltage 1.8 kV, grid 2 voltage 400 V, anode current 5 mA), V, at most 80
Interelectrode capacitance, pF:
input, at most 78-93
output, at most 9-14
transfer, at most 0.1
Warm up time, s, at most 150
Output power, W, at least 400
Output power over 2,000 h of service, W, at least 320

Limit Operating Values
Anode voltage, V 2.5-103
Peak anode voltage, V 4.7.103
Grid 2 voltage, V 500
Negative grid 1 voltage, V 100
Cathode current (DC component), mA 700
Peak cathode current, mA 2.5-103
Dissipation, W:
anode 650
grid 2 15
grid 1 1.5
Frequency, MHz 250
Cathode heating time, s 150
Temperature at anode, stem and seals, °C 150

gu-34b-1(2)1.jpg
Averaged Anode Characteristic Curves:
Uf = 12.6V; Ug2 = 300V;
__ . __ Pa max

gu-34b-1(2)2.jpg
Averaged Anode Characteristic Curves:
Uf = 12.6V; Ug2 = 400V;
Pa max

gu-34b-1(2)3.jpg
Averaged Characteristic Curves:
Uf = 12.6V; Ua = 1.000V;
_____ anode-grid;
_ _ _ grid 2;
_ . _ grid 1

gu-34b-1(2)4.jpg
Averaged Grid-Anode Characteristic Curves:
Uf = 12.6V; Ug2 = 300V;
_____ grid 1;
_ _ _ grid 2

gu-34b-1(3)1.jpg
Averaged Grid-Anode Characteristic Curves:
Uf = 12.6V; Ug2 = 400V;
_____ grid 2;
_ _ _ grid 1