VT-4C
Triode · DHT · UX-4 · 1938
“Military 211 variant. Same mighty bass.”
Power triode delivering 75W for push-pull and SET designs
GAIN FACTOR0
PLATE IMPEDANCE0kΩ
TRANSCONDUCTANCE0mA/V
GAIN12%
POWER100%
DRIVE96%
LINEARITY94%
EXECUTIVE SUMMARY
The VT-4C is a directly-heated triode from GE·RCA, introduced around 1938. It provides a gain factor (μ) of 12 with 4200Ω plate resistance. Commonly used in transmitting (set) applications. Military 211 variant. Same mighty bass.
APPLICATIONS
SET outputPush-pull output
Generic triode transmitting (set) stage
• PA/public address
VS 211
HISTORY
Introduced1938ManufacturerGE·RCAEquivalents211, 242C
Pre-WarSPECIFICATIONS
Heater Voltage10V
Heater Current3.25A
Max Plate Voltage1250V
Max Power75W
Sensitivity3.1 mA/V
Gain Factor12
Internal Impedance4.2kΩ
PinoutUX-4
Era1938
RarityModerate
SPICE model not yet available. Loadline calculator requires calibrated Koren parameters.