Tube-number record
DL 65
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BrandPhilips
ClassOutput Pentode
BaseSubminiature
Construction
Primary TypePentode
EnvelopeGlass
Base MaterialGlass
SectionsSingle
Filament / Heater
MaterialThoriated Tungsten
Absolute Maximum Ratings
Plate Voltage45 V
Plate Dissipation0.025 W
Grid 2 Voltage45 V
Grid 1 Voltage-0.2 V
Cathode Current0.6 mA
Audio Performance
Typical THD10%
Power Output0.0018 W
Key Features
- Hearing aid output stage
- Direct heating
- Subminiature design
- Battery operation
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A | 22.5 V | 420 | 400000 | 9 | 0.475 mA |
Application Notes
The tube is specifically designed for hearing aids with parallel supply. Red spot indicates specific orientation or selection.
Datasheets
Datasheet: DL65.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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