Tube-number record
19EA8
0 archive entries
BrandTung-Sol
ClassTriode-Pentode
BaseNoval (B9A)
Filament18.9 V @ 0.15 mA
Construction
Primary TypeMulti-section
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 | 125 V | 6400 | 80000 | — | 12 mA |
| Triode Section | 150 V | 8500 | 5000 | 40 | 18 mA |
Application Notes
Intended primarily for use as a combined triode oscillator and pentode mixer in television receivers.
0 results