**General
Pentode**, used in output stages of low frequency amplifiers.

Envelope: glass, subminiature.

Mass 6.5 g.

**Lead diagram**

General characteristics:

Filament voltage, Volt | 6.3 |

Anode voltage, Volt | 120 |

2^{nd} grid voltage, Volt |
120 |

Resistance in cathode circuit, Ω | 330 |

Filament (heater) current, mA | 395±35 |

Anode current, mA | 35±8 |

2^{nd} grid current, mA |
0.5 to 2 |

Reverse 1^{st} grid current, mkA |
no more than 0.5 |

Dissipate cathode-heater current, mkA | ≤30 |

Mutual conductance, mA/V | 3.4 to 5.5 |

Inter electrode capacitance, pF: | |

input | 12±3 |

output | 3.3 to 6 |

transfer | ≤0.6 |

Operation time, h | ³1000 |

Limited operating values:

Filament voltage, V | 5,7-7 |

Anode voltage, V | 250 |

2^{nd} grid voltage, V |
250 |

Cathode - heater voltage, V | 200 |

Anode dissipation, W | 5.5 |

2^{nd} grid dissipation, W |
2 |

Cathode current, mA | 60 |

Operating environmental conditions :

Acceleration of vibration loads, g | 15 |

by frequencies, Hz | 5 to 1000 |

Acceleration of multiple impacts, g | 150 |

Acceleration of single impact, g | 500 |

Continuos acceleration, g | 100 |

Ambient temperature, °Ñ | -60 to +125 |

Relative humidity at up to 40°C, % | 98 |

**Plate and plate-grid curves**