6AJ7
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BrandRadio Manufacturers Association
ClassAmplifier Pentode
BaseOctal
Filament6.3V @ 450mA
Construction
Primary TypePentode
EnvelopeMetal Shell, MT-8
Base MaterialMicanol
SectionsSingle
Filament / Heater
Heater NotesCoated Unipotential Cathode
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation3.02 W
Grid 2 Voltage150 V
Audio Performance
Key Features
- Metal Envelope
- Single-Ended
- Small Wafer Octal 8 pin
- High Transconductance
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Sharp Cutoff | 300V | 9000 | 1000000 | - | 10mA |
| Remote Cutoff | 300V | 9000 | 1000000 | - | 10mA |
Application Notes
The d.c. resistance of the grid input circuit should not exceed 0.25 megohm when the screen voltage is obtained from a fixed source. When a series screen resistor is used with full cathode bias, the d.c. resistance in the grid input circuit may be as high as 0.5 megohm.
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