7199
4 Tubes in archive
BrandSylvania
ClassTriode-Pentode
Base9-Pin Miniature Button
Filament6.3V @ 450mA
Construction
Primary TypeTriode-Pentode
EnvelopeT6 1/2
Sections2
Filament / Heater
Heater NotesIndirectly heated
Absolute Maximum Ratings
Plate Voltage330 V
Plate Dissipation3 W
Grid 2 Voltage330 V
H-C Voltage200 V
Audio Performance
Key Features
- Low hum and noise output
- High Fidelity audio applications
- Phase inverter triode
- Preamplifier pentode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Section | 215V | 2100 | 8100 | 17 | 9mA |
| Pentode Section (Case 1) | 100V | 1500 | 1000000 | - | 1.1mA |
| Pentode Section (Case 2) | 220V | 7000 | 400000 | - | 12.5mA |
Application Notes
The pentode section is particularly suited to preamplifier service while the triode section is intended for use as a phase inverter.
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