DL 66
0 Tubes in archive
BrandPhilips
ClassOutput Pentode
BaseSubminiature
Construction
Primary TypePentode
EnvelopeSubminiature Glass
SectionsSingle
Filament / Heater
MaterialDirectly Heated
Absolute Maximum Ratings
Plate Voltage45 V
Grid 2 Voltage45 V
Cathode Current1 mA
Audio Performance
Typical THD10%
Power Output0.0165 W
Key Features
- Subminiature construction
- Red spot indicator for pin 1
- Directly heated filament
- Designed for hearing aids
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Output Amplifier (Mode 1) | 15V | - | - | - | 0.15mA |
| Class A Output Amplifier (Mode 2) | 22.5V | 350 | 300000 | 8 | 0.3mA |
| Class A Output Amplifier (Mode 3) | 30V | - | - | - | 0.47mA |
| Class A Output Amplifier (Mode 4) | 45V | - | - | - | 0.9mA |
Application Notes
Leads near the tube base should not be bent or soldered to avoid damage.
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