Tube-number record
A4
0 archive entries
A4 is a tube type in the TubeDatabase archive (class: Triode). Recorded specifications: brand Sat, construction Triode, and maximum plate voltage 150 V. The archive does not yet hold a photographed example of this type.
BrandSat
ClassTriode
Construction
Primary TypeTriode
EnvelopeGlass
Sections1
Filament / Heater
Absolute Maximum Ratings
Plate Voltage150 V
Grid 1 Voltage-9 V
Audio Performance
Key Features
- Low filament current
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier | 150 V | 900 | 11000 | 10 | 3.5 mA |
Application Notes
Commonly used in early battery-operated radio receivers.
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