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25W4 and 25W4GT Vacuum Tube New and Used

$3.00
25W4 and 25W4GT Vacuum Tube New and Used
25W4 and 25W4GT Vacuum Tube New and Used

Home / Shop

25W4 and 25W4GT Vacuum Tube New and Used

$3.00
Model Number: 25W4NEW
Type 25W4GT 8-pin octal half-wave damper rectifier tube for vintage TV deflection circuits. Available in new and used condition.
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Categories: Vacuum Tubes and Accessories
Manufacturer: Multiple Manufacturers
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  • Description
  • Specifications

The 25W4 (primarily produced in the tubular glass 25W4GT designation) is an 8-pin octal half-wave rectifier engineered as a damper diode for television horizontal deflection circuits. Designed for series-heater TV chassis, its 25-volt, 0.3-ampere heater features high insulation capability to withstand extreme peak pulse voltages between cathode and heater elements.

  • Tube Function: Half-Wave Rectifier / Damper Diode

  • Base Design: 8-Pin Octal (4-Pin active layout / 4CG)

  • Glass Shape: T-9

  • Heater Voltage: 25.0 Volts AC / DC

  • Heater Current: 0.3 Amps (300 mA)

  • Maximum Peak Inverse Plate Voltage: 4,400 Volts

  • Maximum Peak Plate Current: 600 mA

  • Maximum DC Output Current: 110 mA

  • Maximum Peak Heater-Cathode Voltage: 4,400 Volts (DC component + Peak pulse)

  • Cathode Heating Method: Indirect (Unipotential)