Ampera
GP-5
Triode · IHT · 9-pin Magnoval · 1960
“High-voltage shunt regulator. TV / X-ray.”
Power triode delivering 37.5W for push-pull and SET designs
GAIN FACTOR0
PLATE IMPEDANCE0Ω
TRANSCONDUCTANCE0mA/V
Cgk0pF
Cgp0pF
Cpk0pF
GAIN100%
POWER94%
DRIVE100%
LINEARITY10%
EXECUTIVE SUMMARY
The GP-5 is a indirectly-heated triode from Svetlana, introduced around 1960. It provides a gain factor (μ) of 2750 with 182Ω plate resistance. Commonly used in voltage regulator applications. High-voltage shunt regulator. TV / X-ray.
APPLICATIONS
SET outputPush-pull outputHeadphone outputHigh-gain preamp
Generic triode voltage regulator stage
• Headphone amp• Studio/recording• PA/public address
HISTORY
Introduced1960ManufacturerSvetlanaEquivalentsED500, 6BK4
Late ProductionSPECIFICATIONS
Heater Voltage6.3V
Heater Current0.21A
Max Plate Voltage30000V
Max Power37.5W
Sensitivity0.7 mA/V
Gain Factor2750
Internal Impedance182Ω
Pinout9-pin Magnoval
Era1960
RarityModerate
Input Capacitance4pF
Miller Capacitance1.5pF
Output Capacitance0.1pF
SPICE model not yet available. Loadline calculator requires calibrated Koren parameters.