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Tube 6J5B-V / 6Ж5Б-B

• High frequency pentode with short characteristic for amplifying RF voltage.
• Cathode: indirectly heated, oxide-coated.
• Work in any position.
• It is built in miniature glass bulb.
• Gaurantee life time 500 hours
• Tube has seven wire terminals, length is longer than 35mm with diameter 0.4mm

  Figure a.) Tube dimensions

  Figure б.) Socket view from terminals pins

  Figure в.) Schematic view

1. Anode
2. Grid 2
3. Heater
4. Heater
5. Grid 3
6. Cathode
7. Grid 1

Capacitance

• Input 5pF
• Output 4pF
• Transfer 0,05pF
• between Cathode and Heater less than7pF

Voltage

• Heater 6,3V
• Anode 120V
• Grid 2 120V
• Grid 3 0V

  Operational frequency up to 200MHz

  Cathode resistance in the automatic bias mode 100 ohm

Current

• Heater 250 mA ± 25 mA
• Anode 16 mA ±6 mA
• Transconductance – Strmost 10 mA ±2,5 mA/V
• Transconductance at Heater voltage 5,7V is more than 6,3mA/V
• Input resistance at frequency 50MHz is around 7kOhm
• Coeficient broadbands cca 1mA/V – pF
• Equivalent noise resistance is cca 1 kOhm at 50 MHz
• Inverse grid 1 current is less than 0,3uA
• Residual current between Cathode and Heater at 100V is less than 20uA
• Voltage of vibration’s noises at anode resistance 10kOhm and at vibrations 50hz and acceleration 12g/mm is lower than 270mV RMS

Limit values

• Maximal heater voltage 6.9V
• Minimal heater voltage 5.7V
• Maximal Anode voltage 150V
• Maximal Grid 2 voltage 150V
• Maximal dissipation at Anode 2.4W
• Maximal dissipation at second Grid 0.8W
• Maximal DC voltage between Heater and Cathode 150V
• Maximal cathode current 28 mA
• Maximal resistance in first Grid 1MOhm
• Maximal bulb temperature 170°C