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The GU-11B tetrode is used in self-excited RF oscillator circuits with no external feedback, operating in continuous-wave or pulsed mode with anode modulation.
Cathode: indirectly heated, oxide-coated.
Envelope: metal-ceramic with ring leads of cathode,
heater and grid.
Cooling: forced air.
Height: at most 88.5 mm.
Diameter: at most 45 mm.
Mass: at most 120g.
|OPERATING ENVIRONMENTAL CONDITIONS|
|Multiple impacts with acceleration, m/s²||343|
|Ambient temperature, °C||-60 to +100|
|Relative humidity at up to +40 °C, %||98|
|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||8-12|
|Penetration factor (at anode voltage change to 0.4 kV, anode current 15 mA), %||0.7-1.5|
|Operating point (negative grid voltage at anode voltage 400 V, anode current 15 mA), V||4.5-1|
|Interelectrode capacitance, pF:|
|Warm up time (at anode voltage 600 V), s, at most||60|
|Output power in CW operation, W:|
|at wavelength 14 cm, at least||8|
|at wavelength 38 cm, at least||20|
|Output power over 500 h of service (at wavelength 38 cm), W, at least||16|
|Limit Operating Values|
|Heater voltage, V||12-13.2|
|Anode voltage, kV:|
|DC with cold cathode||1|
|peak (with pulse duration about 5 µs)||2|
|Peak grid voltage (with pulse duration about 5 µs), V||-150 to +50|
|Cathode current, A:|
|peak value (with pulse duration about 5 µs)||1.5|
|with forced cooling||80|
|with no forced cooling||20|
|anode heat sink||200|
|Resistance in grid circuit, kOm||10|
Averaged Anode-Grid Characteristic Curves:
Uf = 12.6V