19EA8
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BrandTung-Sol
ClassTriode-Pentode
BaseMiniature 9-Pin
Filament18.9V @ 0.15mA
Construction
Primary TypeTriode-Pentode
EnvelopeGlass
Base MaterialSmall Button 9-Pin
Sections2
Filament / Heater
Warm-up Time11s
Heater NotesAC or DC, Controlled heater voltage surges for warm-up cycle
Absolute Maximum Ratings
Plate Voltage340 V
Plate Dissipation4.1 W
Grid 2 Voltage330 V
H-C Voltage200 V
Audio Performance
Key Features
- Sharp cutoff pentode
- Electrically independent sections
- Miniature construction
- Controlled heater warm-up
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode Section | 125V | 6400 | 80000 | - | 12mA |
| Triode Section | 150V | 8500 | 5000 | 40 | 18mA |
Application Notes
Intended primarily for use as a combined triode oscillator and pentode mixer in television receivers.
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