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5BT8 Vacuum Tube New and Used

$4.00
5BT8 Vacuum Tube New and Used
5BT8 Vacuum Tube New and Used

Home / Shop

5BT8 Vacuum Tube New and Used

$4.00
Model Number: 5BT8NEW
5BT8 triode-sharp cutoff pentode vacuum tube for radio and TV VHF oscillator-mixer and video amplifier stages, featuring a 4.7V 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 5BT8 is a 9-pin miniature compound tube containing a medium-mu triode and a sharp-cutoff pentode in a single envelope. Designed for VHF oscillator-mixer, sound IF, and video amplifier service in television receivers and radio front-ends, it operates on a 4.7V/600mA series heater with controlled warm-up time. It was commonly featured in late-1950s series-string chassis produced by manufacturers such as RCA Victor, Zenith, Philco, 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: 4.7V

  • Heater Current: 0.6A

  • Max Plate Voltage (Triode / Pentode): 300V / 300V

  • Max Plate Dissipation (Triode / Pentode): 2.0W / 3.0W

  • Transconductance (Triode): 8,500 microsiemens (8.5 mA/V)

  • Transconductance (Pentode): 7,000 microsiemens (7.0 mA/V)

  • Equivalents: 5BT8, 6BT8 (6.3V equivalent)