Tube-number record
12FX5
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BrandRCA
ClassPower Pentode
BaseMiniature 7-pin (B7G)
Filament12.6 V @ 450 mA
Construction
Primary TypePentode
Envelope5D
Sections1
Filament / Heater
Heater NotesHeater warm-up time: 11 seconds
Absolute Maximum Ratings
Plate Voltage150 V
Plate Dissipation5.5 W
Grid 2 Voltage130 V
H-C Voltage200 V
Audio Performance
Typical THD8%
Power Output1.3 W
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier | 110 V | 13500 | 17500 | — | 36 mA |
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