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4KE8 Vacuum Tube New and Used

$4.00
4KE8 Vacuum Tube New and Used
4KE8 Vacuum Tube New and Used

Home / Shop

4KE8 Vacuum Tube New and Used

$4.00
Model Number: 4KE8NEW
4KE8 triode-pentode vacuum tube for radio and TV VHF oscillator-mixer and tuner stages, featuring a 4.2V 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 4KE8 is a 9-pin miniature compound tube containing a medium-mu triode and a sharp-cutoff frame-grid pentode in a single envelope. Designed for VHF tuner, local oscillator, and mixer circuits in television and radio receivers, it operates on a 4.2V/450mA series heater. It was used in 1960s receiver front-ends produced by RCA Victor, Zenith, and Admiral. Available in NOS and tested used conditions.

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

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

  • Heater Voltage: 4.2V

  • Heater Current: 0.45A

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

  • Max Plate Dissipation (Triode / Pentode): 2.0W / 2.5W

  • Transconductance (Triode): 5,500 microsiemens (5.5 mA/V)

  • Transconductance (Pentode): 11,000 microsiemens (11.0 mA/V)

  • Equivalents: 4KE8, 6KE8 (6.3V equivalent), 3KE8 (3.15V equivalent), 5KE8 (5.0V equivalent)