Tube-number record
14AF7
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BrandRCA
ClassMedium-Mu Twin Triode
BaseLoctal
Filament12.6 V @ 159.9 mA
Construction
Primary TypeDual triode
EnvelopeT-9
Sections2
Filament / Heater
Heater NotesNominal voltage: 14.0V, Nominal current: 160mA
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation2.5 W
H-C Voltage90 V
Audio Performance
Key Features
- Medium-Mu
- Lock-in Base
- Twin Triode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Condition 1 (Grid Bias) | 100 V | 2600 | 6500 | 17 | 10.8 mA |
| Condition 2 (600 Ohm Cathode Bias) | 100 V | 1900 | 8400 | 16 | 5 mA |
| Condition 3 (1100 Ohm Cathode Bias) | 250 V | 2100 | 7600 | 16 |
Application Notes
Unipotential cathodes. Values are for each unit.
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