6J4

High-frequency pentode with a short anode-grid characteristic.

Designed to work in television devices as an amplifier of high, intermediate and video frequencies, in broadcasting receivers, in mixer circuits with a separate local oscillator and as an aperiodic high frequency amplifier.

Can be used to amplify low frequency voltage when the filament is supplied with direct current.

The 6J4 high-frequency pentode is used in radio-electronic devices for general and household purposes.

Works in any position.

Available in metal finish.

Indirectly heated oxide cathode.

Socle 8-pin with octal with a key.

Overall dimensions of pentode 6J4:

    - lamp height - 67 mm;

    - lamp diameter - 33 mm.

The minimum operating time is not less than 500 hours.

Technical characteristics and electrical parameters of the 6J4 lamp:

Rated electrical data:

• Heating voltage, V 6.3

• Anode voltage, V 300

• Voltage on the second grid, V 150

• Voltage on the third grid, V 0

• Resistance in the cathode circuit for automatic bias, Ohm 160

• Glow current, mA 450 ±25

• Current in the anode circuit, mA 10.25 ±2.25

• Current in the circuit of the second grid, mA 2.2 ±1.0

• Slope of characteristic, mA/V 9.0 ±2.0

• Internal resistance, mOhm 3

• Input impedance at frequencies 45-60 MHz, Ohm about 2600

Maximum allowable electrical values:

• The highest heating voltage, V 7

• Lowest heating voltage, V 5.7

• The highest voltage on the anode, V 330

• The highest voltage on the second grid, V 165

• The highest power dissipated on the anode, W 3.3

• The highest power dissipated on the second grid, W 0.45

• The highest direct voltage between the cathode and the heater, V 100

• The highest leakage current between the cathode and the heater, µA 20

• Metal decoration