GI-7B
Triode · IHT · Coaxial ring · 1960
“Coaxial microwave triode. Ham radio favorite.”
Power triode delivering 300W for push-pull and SET designs
GAIN FACTOR0
PLATE IMPEDANCE0kΩ
TRANSCONDUCTANCE0mA/V
GAIN30%
POWER100%
DRIVE98%
LINEARITY85%
EXECUTIVE SUMMARY
The GI-7B is a indirectly-heated triode from Svetlana, introduced around 1960. It provides a gain factor (μ) of 30 with 2500Ω plate resistance. Commonly used in transmitting / hf-vhf applications. Coaxial microwave triode. Ham radio favorite.
APPLICATIONS
SET outputPush-pull output
Generic triode transmitting / hf-vhf stage
• Headphone amp• PA/public address
HISTORY
Introduced1960ManufacturerSvetlanaEquivalentsGI-70B
Late ProductionSPECIFICATIONS
Heater Voltage12.6V
Heater Current3.15A
Max Plate Voltage1300V
Max Power300W
Sensitivity12 mA/V
Gain Factor30
Internal Impedance2.5kΩ
PinoutCoaxial ring
Era1960
RarityModerate
SPICE model not yet available. Loadline calculator requires calibrated Koren parameters.