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7F8 Vacuum Tube New and Used

$8.25
7F8 Vacuum Tube New and Used
7F8 Vacuum Tube New and Used

Home / Shop

7F8 Vacuum Tube New and Used

$8.25
Model Number: 7F8NEW
Medium-mu twin triode 7F8 loctal vacuum tube with a 6.3V heater rating, available in new old stock (NOS) or tested used options for vintage radio repair, VHF RF amplifiers, and oscillator circuits.
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Categories: Vacuum Tubes and Accessories
Manufacturer: Multiple Manufacturers
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  • Description
  • Specifications

The 7F8 is a high-frequency, medium-mu twin triode vacuum tube designed for oscillator, mixer, and RF amplifier applications in VHF receivers and mobile communications equipment. Featuring a 6.3V filament rating and an 8-pin lock-in (loctal) base in a glass envelope construction, it was engineered for high transconductance and stable performance at higher radio frequencies. Manufactured by companies including Sylvania, Philco, RCA, and GE, this tube was frequently used in FM tuners, VHF equipment, and mid-century radio receivers.

  • Tube Type: High-Frequency Medium-Mu Twin Triode

  • Base Type: Loctal / Lock-In (8-pin)

  • Envelope Style: Glass T-9

  • Filament Voltage: 6.3 V AC/DC

  • Filament Current: 0.3 A (300 mA)

  • Maximum Plate Voltage: 250 V

  • Plate Dissipation: 1.5 W per section

  • Amplification Factor (µ): 48 per section

  • Transconductance: 5.8 mA/V (5,800 µmhos) per section

  • Primary Function: VHF RF amplifier, local oscillator, or mixer stage

  • Condition Options: New Old Stock (NOS) or Tested Used