Tube-number record
W31
0 archive entries
BrandOsram
ClassVariable Mu Screen Pentode
Base7-pin (non-miniature)
Filament13 V @ 0.3 mA
Construction
Primary TypePentode
EnvelopeMetallised bulb
SectionsSingle
Filament / Heater
Heater NotesIndirectly Heated Cathode
Absolute Maximum Ratings
Plate Voltage250 V
Grid 2 Voltage100 V
Audio Performance
Key Features
- Variable Mu
- Low anode-grid interelectrode capacity
- Universal range
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Recommended Operating Condition | 200 V | 2700 | — | — | 8 mA |
| Minimum Gain Condition | 200 V | 10 | — | — | — |
Application Notes
Suitable for use in High Frequency or Intermediate Frequency Amplifying portions of a receiver. A potentiometer network is recommended to maintain screen voltage sensibly constant.
0 results