←20B-EmissionLabs
20B-EmissionLabs
Triode · DHT · UX-4 · 2008
“Enhanced 20A.”
High-power directly-heated triode for single-ended amplification
Datasheet ↗SPICE
GAIN FACTOR0
PLATE IMPEDANCE0kΩ
TRANSCONDUCTANCE0mA/V
GAIN4%
POWER63%
DRIVE99%
LINEARITY95%
TYPICAL OPERATING POINT
EXECUTIVE SUMMARY
The 20B-EmissionLabs is a directly-heated triode from Emission Labs, introduced around 2008. It provides a gain factor (μ) of 4 with 1140Ω plate resistance. Commonly used in power (set) applications. Enhanced 20A.
APPLICATIONS
SET outputPush-pull outputHeadphone output
Generic triode power (set) stage
• Hi-Fi stereo• Headphone amp
HISTORY
Introduced2008ManufacturerEmission LabsEquivalents20A
ModernSPECIFICATIONS
Heater Voltage5V
Heater Current2A
Max Plate Voltage600V
Max Power25W
Sensitivity3.5 mA/V
Gain Factor4
Internal Impedance1.1kΩ
PinoutUX-4
Era2008
RaritySought-after