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The GI-21 B (GI-210) triode generates and amplifies RF oscillations in continuous-wave or pulsed mode with anode modulation.
The triode is available in two variants differing in the type of cooling: the GI-21 B has a heat sink and is designed for forced air cooling and the GI-210 has no heat sink and requires other systems of cooling.
Cathode: indirectly heated, oxide-coated.
Cooling: forced air.
Height: at most 88.5 mm with heat sink, 78.7 mm with no heat sink.
Diameter: at most 45 mm with heat sink, 36.3 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
|OPERATING ENVIRONMENTAL CONDITIONS|
|Multiple impacts with acceleration, m/s²||735|
|Single impacts with acceleration, m/s²||4,900|
|Linear loads with acceleration, m/s²||980|
|Ambient temperature, °C||-60 to +100|
|Relative humidity at up to +40 °C, %||98|
|Heater voltaqe, V||12.6|
|Heater current, A||0.83-0.93|
|Mutual conductance (at anode voltage, 600 V, grid voltage change ±0.5 V, anode current 75 mA), mA/V||23-34|
|Penetration factor (at anode voltage 600 V, anode voltage change -200 V, anode current 75 mA), %||0.65-1.4|
|Cutoff voltage (at anode voltage 600 V, grid current 0.5 µA), V||0 to -1.5|
|Interelectrode capacitance, pF:|
|output, at most||0.05|
|Warm up time, s, at most||60|
|Output power, W, min.:|
|51 heater voltage 10.7 V, anode voltage 300 V, cathode current 150 mA, wavelength at most 13 cm||22|
|over 500 h of service||20|
|Limit Operating Values|
|Heater voltage, V||11.35-13.85|
|Anode voltage, V:|
|DC in CW operation||800|
|DC with cold cathode||1,000|
|peak value (with pulse duration at most 5 µs)||5|
|Cathode current, A:|
|DC component CW operation||0.25|
|peak value (with pulse duration at most 5 µs)||4.5|
|with forced cooling||110|
|with no forced cooling||25|
|in CW operation, at least||10|
|in pulsed operation, at least||9.5|
|Cathode heating time, s, at least||60|
|Anode temperature, °C||200|
|Temperature at leads of cathode and grid, °C||140|
|Resistance in grid circuit, kOm, at least||10|
Averaged Anode Characteristic Curves