(6n6C)

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

Envelope: glass, with octal base.

Mass 38 g.

**Lead diagram**

General characteristics:

Filament voltage, Volt | 6.3 |

Anode voltage, Volt | 250 |

1^{st} grid voltage, Volt |
-12.5 |

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

Filament (heater) current, mA | 475±40 |

Anode current, mA | 46±13 |

2^{nd} grid current, mA |
no more than 7.5 |

1^{st} grid reverse current, mkA |
£ 2 |

Mutual conductance, mA/V | 3 to 5.2 |

Output power, W | no less than 3.6 |

Internal resistance, kΩ | 5.2 |

Inter electrode capacitance, pF: | |

input | 9.5±1.6 |

output | 3.8 to 9.2 |

transfer | no more than 0.9 |

Operation time, h | ³ 1000 |

Limited operating values:

Filament voltage, V | 5,7-6.9 |

Anode voltage, V | 350 |

2^{nd} grid voltage, V |
310 |

Cathode - heater voltage, V | 180 |

Anode dissipation, W | 13.2 |

2^{nd} grid dissipation, W |
2.2 |

Resistance in 1^{st} grid circuit, kΩ |
500 |

Operating environmental conditions :

Acceleration of vibration loads, g | 2.5 |

by frequencies, Hz | 50 |

Ambient temperature, °Ñ | -60 to +70 |

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

**Plate and plate-grid curves**