Tube-number record
A 310
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A 310 is a tube type in the TubeDatabase archive (class: Triode). Recorded specifications: brand Philips, construction Triode, socket 4-pin, and maximum plate voltage 100 V. The archive does not yet hold a photographed example of this type.
BrandPhilips
ClassTriode
Base4-pin
Construction
Primary TypeTriode
EnvelopeGlass
Sections1
Filament / Heater
MaterialThoriated Tungsten
Absolute Maximum Ratings
Plate Voltage100 V
Cathode Current10 mA
Audio Performance
Key Features
- Low filament current
- High vacuum receiving lamp
- Suitable for detection, HF and LF amplification
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Amplifier | 80 V | 400 | 25000 | 10 | — |
| Amplifier | 100 V | 400 | 25000 | 10 | 2.5 mA |
| Detector | 20 V | — | — | — | — |
Application Notes
Requires a variable filament resistor of at least 30 Ohms. Avoid applying excessive filament voltage to prevent damage.
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