Tube-number record
QP.230
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QP.230 is a tube type in the TubeDatabase archive (class: Output Pentode). Recorded specifications: brand Ediswan Mazda, construction Pentode, socket 7-pin (non-miniature), and maximum plate voltage 150 V. The archive does not yet hold a photographed example of this type.
BrandEdiswan Mazda
ClassOutput Pentode
Base7-pin (non-miniature)
Construction
Primary TypePentode
EnvelopeGlass
SectionsDouble
Filament / Heater
MaterialThorium-coated
Absolute Maximum Ratings
Plate Voltage150 V
Grid 2 Voltage150 V
Audio Performance
Typical THD5%
Power Output0.85 W
Key Features
- Battery Double Pentode
- Quiescent push-pull operation
- High efficiency
- Designed for self-bias operation
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Quiescent Push-Pull | 100 V | 3000 | — | — | 3.8 mA |
| Quiescent Push-Pull | 110 V | — | — | — | 4.25 mA |
| Quiescent Push-Pull | 120 V | — | — | — | 4.65 mA |
Application Notes
Intended for the output stage of battery receivers. Economical H.T. and L.T. current consumption. Requires stabilization against parasitic oscillations.
Datasheets
Datasheet: QP230.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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