VT-104
Triode · IHT · Octal · 1942
“Military designation.”
High-gain dual triode — the standard for guitar and hi-fi preamps
Datasheet ↗SPICE
GAIN FACTOR0
PLATE IMPEDANCE0kΩ
TRANSCONDUCTANCE0mA/V
GAIN100%
POWER1%
DRIVE38%
LINEARITY50%
TYPICAL OPERATING POINT
EXECUTIVE SUMMARY
The VT-104 is a indirectly-heated triode from RCA, introduced around 1942. It provides a gain factor (μ) of 100 with 62.5kΩ plate resistance. Commonly used in preamp applications. Military designation.
APPLICATIONS
Voltage amplifierHigh-gain preamp
Generic triode preamp stage
• Hi-Fi stereo• Studio/recording
HISTORY
Introduced1942ManufacturerRCAEquivalentsNone
Pre-WarSPECIFICATIONS
Heater Voltage6.3V
Heater Current0.3A
Max Plate Voltage250V
Max Power0.5W
Sensitivity1.6 mA/V
Gain Factor100
Internal Impedance62.5kΩ
PinoutOctal
Era1942
RarityRare