Tube-number record
220 P.T.
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BrandCossor
ClassPower Pentode
Construction
Primary TypePentode
Envelopeglass
Sections1
Filament / Heater
Absolute Maximum Ratings
Plate Voltage150 V
Grid 2 Voltage150 V
Grid 1 Voltage-9 V
Audio Performance
Key Features
- High undistorted output
- Suitable for moving-coil loudspeaker
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode Power Output | 150 V | 2500 | — | — | 19 mA |
Application Notes
To obtain the full advantage of a pentode valve with the average moving-iron loud speaker a 'Corrector Circuit' should be used. This circuit consists of a condenser of 0.01 mfd and resistance of 10,000 ohms, joined in series across the speaker terminals.
Datasheets
Datasheet: 220PT.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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