Tube-number record
SV6550C
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BrandSvetlana
ClassBeam Power Pentode
BaseOctal
Filament6.3 V @ 1.6 mA
Construction
Primary TypeBeam tetrode / beam power
EnvelopeGlass
Base MaterialMetal sleeve with large wafer octal 8-pin
Sections1
Filament / Heater
Heater NotesAC or DC
Absolute Maximum Ratings
Plate Voltage680 V
Plate Dissipation35 W
Grid 2 Voltage400 V
Grid 1 Voltage-300 V
Cathode Current175 mA
H-C Voltage300 V
Audio Performance
Typical THD5%
Power Output12 W
Key Features
- Increased peak cathode emission
- Gold-plated grid
- Tri-plate anode
- Single-piece beam forming electrode
- Precise grid/screen alignment
- Improved vacuum processing
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 (single tube) | 400 V | 9500 | — | — | 87 mA |
Application Notes
Intended for ultra linear audio frequency power amplification service. Manufactured in St. Petersburg, Russia. Direct replacement for any 6550.
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