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.

KP - cathode and heater; P - heater; C1 - grid 1; C2 - grid 2; A - anode; I-contact surfaces

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

Averaged Anode Characteristic Curves:
U_f = 12.6V; U_g2 = 300V;
__ . __ P_{a max}

Averaged Anode Characteristic Curves:
U_f = 12.6V; U_g2 = 400V;
—— • —— P_{a max}

Averaged Characteristic Curves:
U_f = 12.6V; U_a = 1.000V;
_____ anode-grid;
_ _ _ grid 2;
_ . _ grid 1

Averaged Grid-Anode Characteristic Curves:
U_f = 12.6V; U_g2 = 300V;
_____ grid 1;
_ _ _ grid 2

Averaged Grid-Anode Characteristic Curves:
U_f = 12.6V; U_g2 = 400V;
_____ grid 2;
_ _ _ grid 1

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