304TL
Triode · DHT · Special · 1938
“Four 75TLs in one bottle. Colossal power.”
Power triode delivering 300W for push-pull and SET designs
GAIN FACTOR0
PLATE IMPEDANCE0kΩ
TRANSCONDUCTANCE0mA/V
GAIN12%
POWER100%
DRIVE99%
LINEARITY94%
EXECUTIVE SUMMARY
The 304TL is a directly-heated triode from Eimac, introduced around 1938. It provides a gain factor (μ) of 12 with 1500Ω plate resistance. Commonly used in transmitting (set) applications. Four 75TLs in one bottle. Colossal power.
APPLICATIONS
SET outputPush-pull outputHeadphone output
Generic triode transmitting (set) stage
• Headphone amp• PA/public address
HISTORY
Introduced1938ManufacturerEimacEquivalentsVT-129
Pre-WarSPECIFICATIONS
Heater Voltage10V
Heater Current12.5A
Max Plate Voltage2000V
Max Power300W
Sensitivity8 mA/V
Gain Factor12
Internal Impedance1.5kΩ
PinoutSpecial
Era1938
RarityRare
SPICE model not yet available. Loadline calculator requires calibrated Koren parameters.