Ampera
SV572-10
Triode · DHT · UX-4 · 1995
“Svetlana power triode.”
Power triode delivering 125W for push-pull and SET designs
Datasheet ↗SPICE
GAIN FACTOR0
PLATE IMPEDANCE0kΩ
TRANSCONDUCTANCE0mA/V
Cgk0pF
Cgp0pF
Cpk0pF
GAIN11%
POWER100%
DRIVE97%
LINEARITY95%
TYPICAL OPERATING POINT
EXECUTIVE SUMMARY
The SV572-10 is a modern directly-heated triode designed and manufactured by Svetlana specifically for audio amplifier use, with no direct vintage equivalent. With a mu of approximately 4.5 and plate dissipation of 60W, it can deliver 15-20W in single-ended Class A with a warm, full-bodied sonic character. Unlike vintage transmitting triodes, it was engineered from the start for audio linearity rather than being adapted from RF service. The mesh plate construction and moderate operating voltages (600-800V) make it more practical to implement than 211/845 types while offering similar power levels.
APPLICATIONS
SET outputPush-pull output
Generic triode transmitting (set) stage
• Headphone amp• PA/public address
VS GM70
HISTORY
Introduced1995ManufacturerSvetlanaEquivalentsGM70
ModernSPECIFICATIONS
Heater Voltage13V
Heater Current3.3A
Max Plate Voltage2000V
Max Power125W
Sensitivity4 mA/V
Gain Factor11
Internal Impedance2.8kΩ
PinoutUX-4
Era1995
RaritySought-after
Input Capacitance8pF
Miller Capacitance12pF
Output Capacitance7pF