ME1404
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BrandMullard
ClassSubminiature Electrometer Triode
BaseB5J/F Base
Construction
Primary TypeTriode
EnvelopeSubminiature
Filament / Heater
MaterialDirectly heated
Absolute Maximum Ratings
Plate Voltage25 V
Cathode Current0.25 mA
Audio Performance
Key Features
- Controlled logarithmic relationship between grid and anode current
- Low grid current (2 x 10-15A range)
- Designed for linear and logarithmic use
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Linear Operation | 9V | 80 | - | 2 | 0.1mA |
Application Notes
To prevent photoemission from the grid, the valve should be operated in darkness or at a low ambient light level. Avoid contamination of the glass; do not handle within 13mm of the base.
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