Tube-number record
4064-A / 4064-B
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BrandStandard Valves
ClassHalf Wave, Hot Cathode Mercury Vapour Rectifier
Base4-pin
Construction
Primary TypeRectifier
Rectifier TypeMercury Vapour
EnvelopeGlass
Base MaterialStandard
SectionsSingle
Filament / Heater
MaterialOxide coated (Shielded)
Warm-up Time90s
Absolute Maximum Ratings
Plate Voltage10000 V
Cathode Current1250 mA
Audio Performance
Key Features
- Shielded filament
- Constant voltage type
- Mercury vapour
- Directly heated
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Circuit 2 (2 valves) | 3200 V | — | — | — | 2500 mA |
| Circuit 3 (4 valves) | 6400 V | — | — | — | 2500 mA |
| Circuit 4 (3 valves) | 4550 V | — | — | — | 3750 mA |
Application Notes
After shipment the filament must be run at full voltage for 30 minutes before any anode voltage is applied. The filament transformer should be so connected that the anode and filament voltages are 90° out of phase. The maximum peak anode current and output current should be reduced by 50 per cent if quadrature operation is not possible.
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