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GM-70

TRIODE

The GM-70 triode is used as a low-frequency power amplifier in RF equipment.

GENERAL
Cathode: directly heated, carbonized tungsten.
Envelope: glass, with base.
Height: at most 185 mm.
Diameter: at most 65 mm.
Mass: at most 300 g.

gm-70(1)00071.jpg

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

BASIC DATA
Electrical Parameters
Filament voltage, V 20
Filament current, A 2.8-3.4
Mutual conductance (at anode voltage 600 V, anode current 160-260 mA), mA/V 4.6-7.2
Gain coefficient (at anode voltage 1.2-1 kV, anode current 125 mA) 5.6-8.2
Anode current, mA:
at grid voltage 175 V, at least 20
at grid voltage 200 V, at most 80
Interelectrode capacitance, pF:
input 5-11
output 3-6
transfer 7-14

Limit Operating Values
Filament voltage, V 19-21
Anode voltage, kV 1.65
Anode dissipation, W 125

gm-70(2)00081.jpg
Averaged Characteristic Curves:
Uf = 20V; anode voltage Uf is equal to grid voltage Ug;
_____ anode;
_ _ _ grid-anode

gm-70(2)00082.jpg
Averaged Anode Characteristic Curves: Uf = 20V

gm-70(2)00083.jpg
Averaged Characteristic Curves:
Uf = 20V;
_____ anode-grid;
_ _ _ grid