14R7
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BrandGeneral Electric
ClassDuplex-Diode Pentode
BaseLoctal 8-Pin
Filament12.6V @ 150mA
Construction
Primary TypeDuplex-Diode Pentode
EnvelopeT-9 Glass
SectionsDuplex-Diode, Semi-remote-cutoff pentode
Filament / Heater
Heater NotesCoated Unipotential Cathode
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation2 W
Grid 2 Voltage125 V
H-C Voltage90 V
Audio Performance
Key Features
- Low coupling capacitance between diode units and pentode section
- Semi-remote-cutoff pentode
- Combined detector, AVC rectifier and audio amplifier
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 Amplifier | 100V | 2000 | 350000 | - | 5.5mA |
| Class A1 Amplifier | 250V | 2000 | 1000000 | - | 5.7mA |
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