19Q9
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BrandSylvania
ClassMedium-mu triode and semi-remote cutoff pentode
Base10-pin
Filament18.9V @ 150mA
Construction
Primary TypeMulti-section
EnvelopeT-6 1/2
Sections2
Filament / Heater
Heater NotesHeater warm-up time 17 seconds
Absolute Maximum Ratings
Plate Voltage330 V
Plate Dissipation3 W
Grid 2 Voltage330 V
H-C Voltage200 V
Audio Performance
Key Features
- Semi-remote cutoff pentode
- Medium-mu triode
- 10-pin bulb
- FM RF amplifier
- Autodyne mixer
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Section - Class A1 Amplifier | 125V | 8000 | 5000 | 40 | 14mA |
| Pentode Section - Class A1 Amplifier | 125V | 6500 | 200000 | - | 12mA |
Application Notes
Intended primarily for use as an FM RF amp. and autodyne mixer. Triode section control grid spacing precludes use of more than 100V between elements in checkers.
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