**1ZH18B**

Pentode for HF and intermediate frequency amplification.

Envelope: sub-miniature, glass.

Mass 4 g.

**General characteristics:**

Type | 1ZH18B |

Filament voltage, Volt | 1,2 |

Anode voltage, Volt | 60 |

2^{nd} grid voltage, Volt |
45 |

1^{st} grid voltage, Volt |
0 |

Type | 1ZH18B |

Filament (heater) current, mA | 23,5±2,5 |

Anode current, mA | 1,35±0,5 |

2^{nd} grid current, mA |
£0,25 |

Reverse 1^{st} grid current, mkA |
£ 0,5 |

Mutual conductance, mA/V | 1,15 to 0,45 |

Internal resistance, Kohm | ≥100 |

Equivalent noise resistance, kOhm | 7 |

Vibration noise (by R_{A}=2 KOhm), mV |
£ 50 |

Inter electrode capacitance, pF: | |

input | 3,25±0,9 |

output | 2,4±0,4 |

transfer | £ 0,01 |

Operation time, h | 3000 |

**Limited operating values:**

Type | 1ZH18B |

Filament voltage, V | 1,08-1,32 |

Anode voltage, V | 90 |

2^{nd} grid voltage, V |
60 |

Cathode current, mA | 2,5 |

Resistance in 1^{st} grid circuit, MOhm |
1 |

Tubes temperature, °Ñ | 85 |

**Operating environmental conditions :**

Type | 1ZH18B |

Acceleration of vibration loads, g | 6 |

by frequencies, Hz | 5-600 |

Acceleration of multiple impacts, g | 150 |

Acceleration of single impact, g | 500 |

Continuos acceleration, g | 100 |

Ambient temperature, °Ñ | -60 to +85 |

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