Tube-number record
DL98
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ClassR.F. Output Pentode
BaseMiniature 7-pin (B7G)
Construction
Primary TypePentode
EnvelopeGlass
Sections1
Filament / Heater
Absolute Maximum Ratings
Plate Voltage150 V
Plate Dissipation3 W
Grid 2 Voltage135 V
Grid 1 Voltage-75 V
Cathode Current32 mA
Audio Performance
Power Output1.25 W
Key Features
- R.F. output pentode
- Portable equipment
- Class C r.f. amplifier
- Oscillator
- Frequency multiplier
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Characteristics Condition 1 | 90 V | 1700 | 22000 | 3.2 | 15 mA |
| Characteristics Condition 2 | 135 V | 2150 | 22000 | 3.45 | 30 mA |
| Class C Amplifier 90V | 90 V | — | — | — | 15 mA |
Application Notes
When the filament sections are series connected, the lower section of the filament should be shunted by a resistor to by-pass the cathode current of the upper section.
Datasheets
Datasheet: DL98.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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