Tube-number record
H42
0 archive entries
H42 is a tube type in the TubeDatabase archive (class: Detector and Amplifying Triode). Recorded specifications: brand Osram, construction Triode, base Standard, socket 7-pin (non-miniature), and maximum plate voltage 250 V. The archive does not yet hold a photographed example of this type.
BrandOsram
ClassDetector and Amplifying Triode
Base7-pin (non-miniature)
Filament4 V @ 600 mA
Construction
Primary TypeTriode
EnvelopeGlass (Carbonised bulb)
Base MaterialStandard
SectionsSingle
Filament / Heater
Heater NotesIndirectly Heated Cathode (A.C. Mains)
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Resistance capacity coupled circuit | 250 V | 1500 | 66000 | 100 | 1 mA |
| Resistance capacity coupled circuit | 200 V | — | — | — | 0.9 mA |
| Resistance capacity coupled circuit | 150 V | — | — | — |
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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