DF61
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BrandMullard
ClassSubminiature R.F. Pentode
BaseB5G/F
Construction
Primary Typepentode
EnvelopeSubminiature
Sections1
Filament / Heater
MaterialDirectly Heated
Absolute Maximum Ratings
Plate Voltage90 V
Grid 2 Voltage67.5 V
Cathode Current2.5 mA
Audio Performance
Key Features
- Subminiature
- Battery operated
- R.F. Pentode
- Frequency Changer capability
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| R.F. Pentode Operation | 45V | 750 | 1400000 | 21 | 0.8mA |
| R.F. Pentode Operation | 67.5V | 950 | 1600000 | 21 | 1.7mA |
| Frequency Changer | 45V | - | 1400000 | - | 0.6mA |
| Frequency Changer | 67.5V | - | 2000000 | - | 1.35mA |
Application Notes
R.F. Pentode for use in battery operated receivers. Suitable for d.c. operation only.
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