Tube-number record
1AC5
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1AC5 is a tube type in the TubeDatabase archive (class: Power Pentode). Recorded specifications: brand RCA, year 1949, construction Pentode, socket 8-pin, and maximum plate voltage 67.5 V. The archive does not yet hold a photographed example of this type.
BrandRCA
ClassPower Pentode
Base8-pin
Construction
Primary TypePentode
EnvelopeSubminiature
SectionsSingle
Filament / Heater
MaterialCoated
Absolute Maximum Ratings
Plate Voltage67.5 V
Grid 2 Voltage67.5 V
Cathode Current4 mA
Audio Performance
Typical THD16%
Power Output0.05 W
Key Features
- Subminiature
- Power Pentode
- Battery Operated
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 (Condition 1) | 30 V | 450 | 200000 | — | 0.5 mA |
| Class A1 (Condition 2) | 45 V | 600 | 170000 | — | 1 mA |
| Class A1 (Condition 3) | 67.5 V | 750 | 150000 | — | 2 mA |
Application Notes
Small button sub-minar base. Mounting position: Any.
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