6R7
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BrandRCA
ClassDuplex-Diode Triode
BaseSmall Wafer Octal 7-Pin
Filament6.3V @ 300mA
Construction
Primary TypeDuplex-Diode Triode
EnvelopeAll-Metal
SectionsTwo diodes and a triode
Filament / Heater
Absolute Maximum Ratings
Plate Voltage250 V
Audio Performance
Power Output0.28 W
Key Features
- All-Metal tube
- Detector, amplifier, and automatic-volume-control tube
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Unit - Class A Amplifier | 250V | 1900 | 8500 | 16 | 9.5mA |
Application Notes
Grid bias for the triode unit may be obtained from a fixed source or from a cathode-bias resistor. It should not be obtained by the diode-biasing method because of the probability of plate-current cut-off.
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