MHD4
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BrandMarconi
ClassDouble Diode Triode
Base7 pin
Filament4V @ 1mA
Construction
Primary TypeDouble Diode Triode
EnvelopeMetallised
Filament / Heater
Absolute Maximum Ratings
Plate Voltage250 V
Audio Performance
Key Features
- Detection
- A.V.C.
- L.F. amplification
- High amplification factor
- Moderate impedance
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RC Coupled | 350V | - | 50000 | - | 4mA |
| RC Coupled | 250V | - | 50000 | - | 3.2mA |
| RC Coupled | 250V | - | 50000 | - | 2.8mA |
| RC Coupled | 250V | - | 50000 | - | 2.2mA |
Application Notes
Intended for detection, A.V.C. and L.F. amplification in straight or super-het receivers. Allows good gain with R.C. coupling; transformer coupling also suitable.
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