V.312
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BrandMazda
ClassA.C. Mains Triode
Base5-pin
Filament4V @ 650mA
Construction
Primary TypeTriode
EnvelopeMetallised
Filament / Heater
Absolute Maximum Ratings
Plate Voltage250 V
Audio Performance
Key Features
- Indirectly heated
- Low hum level
- Low valve noise
- Metallised bulb
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Rating | 100V | 2500 | 12000 | 30 | - |
| Typical Operation 1 | 150V | 2000 | - | - | 3mA |
| Typical Operation 2 | 150V | 1600 | - | - | 2mA |
Application Notes
The V.312 is specially intended for use in microphone amplifiers and similar applications where low hum level and valve noise are required. May be used as a low-frequency amplifier with either transformer, choke or resistance-capacity coupling. Anode resistance of 50,000 to 100,000 ohms suitable for RC coupling.
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