H42
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BrandOsram
ClassDetector and Amplifying Triode
Base7-pin
Filament4V @ 600mA
Construction
Primary TypeTriode
EnvelopeGlass (Carbonised bulb)
Base MaterialStandard
SectionsSingle
Filament / Heater
Heater NotesIndirectly Heated Cathode (A.C. Mains)
Absolute Maximum Ratings
Plate Voltage250 V
Audio Performance
Key Features
- Top cap grid connection
- Non-microphonic
- Carbonised bulb
- High Amplification Factor
- High sensitivity
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Resistance capacity coupled circuit | 250V | 1500 | 66000 | 100 | 1mA |
| Resistance capacity coupled circuit | 200V | - | - | - | 0.9mA |
| Resistance capacity coupled circuit | 150V | - | - | - | 0.8mA |
| Resistance capacity coupled circuit | 100V | - | - | - | 0.75mA |
Application Notes
Particularly suitable for use in a resistance capacity coupled circuit or as a detector. Can load a PX4 valve operating at maximum condition from a 0.5V input.
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