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The GI-15B-1 (GI-150-1) triode is used as a RF oscillator and amplifier operating in continuous-wave or pulsed mode with anode modulation.

The triode is available in two variants differing in the type of cooling: the GI-15B-1 with a heat sink for forced air cooling and the GI-150-1 with no heat sink.

Cathode: indirectly heated, oxide-coated.
Envelope: metal-ceramic.
Height: 88.5 mm with heat sink, 79.7 mm with no heat sink.
Diameter: at most 45 mm with heat sink, 26.3 mm with no heat sink.
Mass: at most 120 g with heat sink, 60 g with no heat sink.

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

Vibration loads:
frequencies, Hz 1-200
acceleration, m/s² 49
Multiple impacts with acceleration, m/s² 392
Ambient temperature, °C -10 to +55
Relative humidity at up to +25 °C, % 98

Electrical Parameters
Heater voltage, V 12.6
Heater current, A 0.75-0.88
Mutual conductance (at anode voltage 400 V, grid voltage change 0.5 V, anode current 15 mA), mA/V, at least 8
Negative grid voltage (at anode voltage 400 V, anode current 15 mA), V 4-1.5
Interelectrode capacitance, pF:
input 9-12
transfer 2-3
Warm up time, s, at most 60
Output power, W, at least 8.5
Output power over 1200 h of service, W, at least 7

Limit Operating Values
Heater voltage, V 12-13.2
Anode voltage, kV:
in pulsed operation (with pulse duration at most 5 µs) 4
DC 0.8
Cathode current, A:
r.m.s. 0.15
in pulsed operation (with pulse duration at most 5 µs) 3.5
Dissipation, W:
anode, with forced cooling 80
grid 2
Wavelength (in pulsed operation), cm, at least 8.5
Cathode heating time, s, at least 45
Temperature, °C:
anode 200
leads of grid and cathode 120
cathode lead (after operation for at most 10 min) 140
Resistance in grid circuit, kOm 10