Tube-number record
25Z6WGT
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BrandTung-Sol
Classrectifier
BaseOctal
Filament25 V @ 300 mA
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
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Half-Wave Rectifier (Capacitor Input Filter) - Low Voltage | 117 V | — | 15 | — | 75 mA |
| Half-Wave Rectifier (Capacitor Input Filter) - High Voltage | 235 V | — | 100 | — | 75 mA |
| Voltage Doubler (Half-Wave) | 117 V | — | 30 | — |
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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