6K4P, 6K4P-EV

(6K4n, 6K4n-EB)

Analogue of EF93, 6F31

General

Pentode with long characteristic, used as an high frequency and intermediate frequency amplifier in automatic gain control circuits.

Envelope: glass miniature.

Mass 13 g.

Lead diagram

General characteristics:

Type | 6K4n | 6K4n-EB |

Filament voltage, Volt | 6.3 | 6.3 |

Anode voltage, Volt | 250 | 250 |

2^{nd} grid voltage, Volt |
100 | 100 |

Resistance in cathode circuit, Ohm | 68 | 68 |

Type | 6K4n | 6K4n-EB |

Filament (heater) current, mA | 270 to 330 | 275 to 325 |

Anode current, mA | 7 to 13 | 7 to 13 |

2^{nd} grid current, mA |
less than 5.5 | less than 5.5 |

Reverse 1^{st} grid current, mkA |
less than 1 | less than 0.3 |

Dissipate cathode-heater current, mkA | less than 20 | less than 20 |

Mutual conductance, mA/V | 3.5 to 5.3 | 3.5 to 5.3 |

Internal resistance, kOhm | 850 | 450 |

Input resistance (at f=60 MHz), kOhm | - | 5 |

Vibration noise (at R_{A}=2 kOhm), mV |
less than 400 | less than 180 |

Inter electrode capacitance, pF: | ||

input | 6 | 5.6 to 7.2 |

output | 6.3 | 5.5 to 7.7 |

transfer | less than 0.0045 | less than 0.0035 |

cathode-heater | 5.5 | 5.5 |

Operation time, h | no less than 5000 90% |
no less than 5000 98% |

Limited operating values:

Type | 6K4n | 6K4n-EB | ||

Filament voltage, V | 5.7 to 6.9 | 6 to 6.6 | ||

Anode voltage, V | 300 | 300 | ||

2^{nd} grid voltage, V |
125 | 125 | ||

Cathode – heater voltage, V | 90 | 90 | ||

Cathode current, mA | 20 | 20 | ||

Anode dissipation, W | 3 | 3 | ||

2^{nd} grid dissipation, W |
0.6 | 0.6 | ||

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

Operating environmental conditions :

Type | 6K4n | 6K4n-EB |

Acceleration of vibration loads, g | 2.5 | 6 |

at the frequencies, Hz | 50 | 5 to 600 |

Acceleration of multiple impacts, g | 12 | 150 |

Acceleration of single impact, g | - | 150 |

Continuos acceleration, g | - | 100 |

Ambient temperature, °Ñ | –60 to +70 | –60 to +90 |

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

Plate-grid and plate curves

Plate-grid curves | Plate curves |