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4GJ7 Vacuum Tube New and Used

$5.00
4GJ7 Vacuum Tube New and Used
4GJ7 Vacuum Tube New and Used

Home / Shop

4GJ7 Vacuum Tube New and Used

$5.00
Model Number: 4GJ7NEW
4GJ7 triode-frame grid pentode vacuum tube for radio and TV VHF oscillator-mixer and tuner stages, featuring a 4.5V heater and 9-pin miniature base.
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Categories: Vacuum Tubes and Accessories
Manufacturer: Multiple Manufacturers
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  • Description
  • Specifications

The 4GJ7 (PCF801 equivalent) is a 9-pin miniature compound tube containing a medium-mu triode and a high-transconductance frame-grid pentode in a single envelope. Designed for VHF oscillator-mixer and tuner applications in radio receivers and TV front-ends, it operates on a 4.5V/450mA series heater. It was regularly utilized in European and American multi-band receiver designs by manufacturers such as Telefunken, Grundig, Zenith, and RCA. Available in NOS and tested used conditions.

  • Type: Medium-Mu Triode / Sharp-Cutoff Frame-Grid Pentode (VHF Tuner / Oscillator-Mixer)

  • Base: 9-Pin Miniature Noval (EIA 9AE layout)

  • Heater Voltage: 4.5V

  • Heater Current: 0.45A

  • Max Plate Voltage (Triode / Pentode): 250V / 250V

  • Max Plate Dissipation (Triode / Pentode): 1.7W / 2.1W

  • Transconductance (Triode): 5,000 microsiemens (5.0 mA/V)

  • Transconductance (Pentode): 12,000 microsiemens (12.0 mA/V)

  • Equivalents: 4GJ7, PCF801, 5GJ7 (5.0V equivalent), 6GJ7 / ECF801 (6.3V equivalent)