100TH
Triode · DHT · UX-4 · 1938
“High-mu Eimac transmitting triode. Needs power drive.”
Power triode delivering 100W for push-pull and SET designs
GAIN FACTOR0
PLATE IMPEDANCE0kΩ
TRANSCONDUCTANCE0mA/V
GAIN38%
POWER100%
DRIVE88%
LINEARITY81%
EXECUTIVE SUMMARY
The 100TH is a directly-heated triode from Eimac, introduced around 1938. It provides a gain factor (μ) of 38 with 12.5kΩ plate resistance. Commonly used in transmitting (set) applications. High-mu Eimac transmitting triode. Needs power drive.
APPLICATIONS
SET outputPush-pull output
Generic triode transmitting (set) stage
• PA/public address
HISTORY
Introduced1938ManufacturerEimacEquivalentsVT-218
Pre-WarSPECIFICATIONS
Heater Voltage5V
Heater Current10.5A
Max Plate Voltage3000V
Max Power100W
Sensitivity3 mA/V
Gain Factor38
Internal Impedance12.5kΩ
PinoutUX-4
Era1938
RarityRare
SPICE model not yet available. Loadline calculator requires calibrated Koren parameters.