1710
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BrandPhilips
ClassRectifier
Base40221
Construction
Primary TypeGas-filled
Rectifier TypeDouble-anode
Envelopemax 69.5 mm x 205 mm
Sections2
Filament / Heater
Materialoxide-coated
Warm-up Time30s
Absolute Maximum Ratings
Plate Voltage470 V
Cathode Current3000 mA
Audio Performance
Key Features
- Mercury vapour and gas filled
- Direct heating by A.C.
- Dual anode design
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Full-wave rectifier | 150V | - | - | - | 3000mA |
Application Notes
The screens must be connected to the cathode via a resistor of 10 kOhms, 0.5 W. Application: magnetic chucks (3 A per valve). Filament warmup time can be decreased to 15 seconds if urgently required.
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