Tube-number record
4650
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BrandPhilips
ClassOutput Pentode
BaseSide-contact (P-base)
Construction
Primary TypePentode
EnvelopeGlass
Filament / Heater
MaterialDirectly heated
Absolute Maximum Ratings
Plate Voltage550 V
Plate Dissipation25 W
Grid 2 Voltage300 V
Grid 1 Voltage-2 V
Cathode Current100 mA
Audio Performance
Typical THD10%
Power Output10.3 W
Key Features
- Direct heating
- Parallel supply
- Power output up to 41W in AB
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A | 300 V | 3900 | 20000 | 4.5 | 83 mA |
| Class A High Voltage | 550 V | 3200 | 30000 | 4.5 | 45 mA |
| Class B Push-Pull | 300 V | — | — | — | 30 mA |
Application Notes
Operating conditions provided for Class A, AB, and B. High voltage operation up to 550V.
Datasheets
Datasheet: 4650.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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