Tube-number record
A577
0 archive entries
A577 is a tube type in the TubeDatabase archive (class: Triode). Recorded specifications: brand Osram, construction Triode, socket 5-pin, and maximum plate voltage 250 V. The archive does not yet hold a photographed example of this type.
BrandOsram
ClassTriode
Base5-pin
Filament4 V @ 1 mA
Construction
Primary TypeTriode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesIndirectly Heated Cathode
Absolute Maximum Ratings
Plate Voltage250 V
Audio Performance
Key Features
- Mains-operated
- Portable
- High frequency operation
- Anode bend rectifier
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Characteristics measured at Ea=100, Eg=0 | 100 V | 2000 | 3000 | 6 | — |
Application Notes
Specifically designed for use in valve voltmeters. Suitable for all frequencies included in normal radio and audio frequency work, but not applicable to an audio frequency amplifier.
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