19V8
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BrandTung-Sol
ClassTriple-Diode Triode
Base9 Pin Miniature
Filament18.9V @ 150mA
Construction
Primary TypeTriple-Diode Triode
EnvelopeGlass Bulb
Base MaterialButton Base
SectionsTwo high perveance diodes, one medium perveance diode, and one high-mu triode
Filament / Heater
Heater NotesAC or DC
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation1 W
H-C Voltage200 V
Audio Performance
Key Features
- Coated Unipotential Cathode
- High perveance diodes
- Independent cathode for diode #4
- Triple diode triode structure for AM/FM
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 Amplifier | 100V | 1300 | 54000 | 70 | 0.8mA |
| Class A1 Amplifier | 250V | 1200 | 58000 | 70 | 1mA |
Application Notes
The 19V8 is designed for use in AM/FM receivers with minimum switching. One high perveance diode has an independent cathode for balanced low impedance detector circuits.
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