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Tube Database (1,270 tubes)

Other (3257), Pre (2314), Power (1030), Rectifier (740)
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25Z6WGT

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BrandTung-Sol
Classrectifier
BaseOctal
Filament25V @ 300mA

Construction

Primary TypeDiode
Rectifier TypeFull-Wave High-Vacuum Rectifier-Doubler
EnvelopeT-9 Glass
Base MaterialLow Loss Medium Shell 7 Pin Octal
Sections2

Filament / Heater

Heater NotesLimits of applied voltage: 25.0 +/- 2.5 V

Absolute Maximum Ratings

Cathode Current85 mA
H-C Voltage350 V

Audio Performance

Key Features
  • Ruggedized
  • Heater-cathode type
  • Full-wave high-vacuum rectifier-doubler
  • Any mounting position

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Half-Wave Rectifier (Capacitor Input Filter) - Low Voltage117V-15-75mA
Half-Wave Rectifier (Capacitor Input Filter) - High Voltage235V-100-75mA
Voltage Doubler (Half-Wave)117V-30-75mA
Voltage Doubler (Full-Wave)117V-15-75mA

Application Notes

As a half-wave rectifier, the two sections may be used separately or in parallel. When filter capacitors larger than 40 uF are used, it may be necessary to increase plate supply resistance above value given.

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