GS-31B

TRIODE

The GS-31 B triode fulfils generation and amplification functions in grounded-grid circuits in continuouswave operation in the decimetric and metric wavelength ranges.

GENERAL
Cathode: indirectly heated, dispenser, oxide-coated.
Envelope: metal-ceramic.
Cooling: forced air.
Height, mm, at most:

with heat sink: 147

without heat sink: 134

A - anode; C - grid; KP - cathode and heater; P - heater

BASIC DATA Electrical Parameters
Heater voltage, V	12.6
Heater current, A	3.1-3.7
Mutual conductance (at anode voltage 2 kV, grid voltage 1 V and anode current 250 mA), mA/V, at least	22
Operating point (negative grid voltage at anode voltage 2 kV and anode current 250 mA), V	6-12
Interelectrode capacitance, pF:
input	19-24
output, at most	0.12
transfer	3.8-5.2
Warm up time, s, at most	120
Output power, W, min.:
at anode voltage 1.8 kV, anode current 500 mA, wavelength 60 cm	360
at anode voltage 1.7 kV, anode current 700 mA, wavelength 30 cm	180

Limit Operating Values
Heater voltage, V	12-13.2
Anode voltage, kV:
DC	3
instantaneous value	6
Grid voltage (instantaneous value), V	-400 to +120
Cathode current (r.m.s. value), A	1.4
Dissipation, W:
anode	1.0x103
grid	22
Temperature at anode lead, °C	200
Temperature at cathode and grid leads, °C	120
Temperature at external ceramic parts, °C	250
Wavelength,cm	28-100

Averaged Characteristic Curves:
U_f = 12.6V;
_____ anode;
_ _ _ grid-anode

Averaged Characteristic Curves:
U_f= 12.6V;
_____ grid;
_ _ _ anode-grid

Averaged Characteristic Curves Showing Output Power and Efficiency versus Anode Current:
U_f = 12.6V; L = 30cm;
_____ output power (P);
_ _ _ efficiency (n)

Averaged Characteristic Curves Showing Output Power and Efficiency versus Anode Current:
U_f = 12.6V; L = 30cm;
_____ output power (P);
_ _ _ efficiency (n)

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