Tube-number record
DF61
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BrandMullard
ClassSubminiature R.F. Pentode
BaseSubminiature
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 | 45 V | 750 | 1400000 | 21 | 0.8 mA |
| R.F. Pentode Operation | 67.5 V | 950 | 1600000 | 21 | 1.7 mA |
| Frequency Changer | 45 V | — | 1400000 | — | 0.6 mA |
Application Notes
R.F. Pentode for use in battery operated receivers. Suitable for d.c. operation only.
Datasheets
Datasheet: DF61.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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