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25AC5 and 25AC5GT Vacuum Tube New and Used

$9.00
25AC5 and 25AC5GT Vacuum Tube New and Used
25AC5 and 25AC5GT Vacuum Tube New and Used

Home / Shop

25AC5 and 25AC5GT Vacuum Tube New and Used

$9.00
Model Number: 25AC5NEW
Type 25AC5G / 25AC5GT 8-pin octal high-mu power amplifier triode tube for dynamic-coupled AC/DC radio 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 25AC5 (available in ST-glass 25AC5G and tubular-glass 25AC5GT variants) is an 8-pin octal high-mu power amplifier triode designed specifically for positive grid bias operation in dynamic-coupled Class A audio output stages. Designed for line-operated AC/DC radio receivers, its 25-volt, 0.3-ampere heater operates efficiently in series-heater strings. Driven by low-mu triodes such as the 6AE5G or 6P5G, it delivers clean audio output without typical grid-current loading issues.

  • Tube Function: High-Mu Power Amplifier Triode (Dynamic-Coupled)

  • Base Design: 8-Pin Octal (6-Pin active layout / 6Q)

  • Glass Shape: ST-12 (25AC5G) or T-9 (25AC5GT)

  • Heater Voltage: 25.0 Volts AC / DC

  • Heater Current: 0.3 Amps (300 mA)

  • Maximum Plate Voltage: 180 Volts DC

  • Maximum Plate Dissipation: 10 Watts

  • Amplification Factor (Mu): 58

  • Transconductance: 3,800 micromhos

  • Typical Power Output: 2.0 to 2.7 Watts (with 6AE5G, 6P5G, or 37 driver)

  • Cathode Heating Method: Indirect (Unipotential)