Tube-number record
SV572-30
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BrandSvetlana
ClassMedium-Mu Audio Power Triode
BaseSpecial / none
Construction
Primary TypeTriode
EnvelopeHard glass
Base MaterialWhite ceramic
SectionsSingle
Filament / Heater
MaterialThoriated-tungsten
Absolute Maximum Ratings
Plate Voltage1000 V
Plate Dissipation125 W
Cathode Current210 mA
Audio Performance
Typical THD5%
Power Output78 W
Key Features
- Directly heated thoriated tungsten filament
- Hard glass envelope
- White ceramic base
- Low microphonic construction
- Graphite plate with titanium coating
- No plate cap
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A2 (Single) | 500 V | 6500 | 4600 | 29.5 | 60 mA |
| Class A2 (Single) | 1000 V | 6500 | 4600 | 29.5 | 100 mA |
| Class AB2 (Push-Pull) | 1000 V | 6500 | 4600 | 29.5 | 150 mA |
Application Notes
The anode may be operated at red heat without decreasing lifetime, as long as dissipation is kept below 125 watts. Maintain at least 4 inches clearance from other components.
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