5977
Dual Triode · IHT · 9-pin Noval · 1958
“Military subminiature.”
Medium-gain triode for driver and line stage applications
Datasheet ↗SPICE
GAIN FACTOR0
PLATE IMPEDANCE0kΩ
TRANSCONDUCTANCE0mA/V
GAIN20%
POWER8%
DRIVE96%
LINEARITY90%
TYPICAL OPERATING POINT
EXECUTIVE SUMMARY
The 5977 is a dual indirectly-heated triode from Raytheon, introduced around 1958. It provides a gain factor (μ) of 20 with 4000Ω plate resistance. Commonly used in preamp applications. Military subminiature.
APPLICATIONS
Voltage amplifierPhase splitter
Generic triode preamp stage
• Hi-Fi stereo• Headphone amp
HISTORY
Introduced1958ManufacturerRaytheonEquivalentsNone
Golden AgeSPECIFICATIONS
Heater Voltage6.3V
Heater Current0.3A
Max Plate Voltage200V
Max Power3.3W
Sensitivity5 mA/V
Gain Factor20
Internal Impedance4.0kΩ
Pinout9-pin Noval
Era1958
RarityRare