26
Triode · DHT · UX-4 · 1926
“Creamy tone. Early DHT magic.”
Low-mu triode with excellent linearity for driver and line stages
GAIN FACTOR0
PLATE IMPEDANCE0kΩ
TRANSCONDUCTANCE0mA/V
GAIN8%
POWER4%
DRIVE93%
LINEARITY95%
EXECUTIVE SUMMARY
The 26 is a directly-heated triode from RCA·GE, introduced around 1926. It provides a gain factor (μ) of 8.3 with 7500Ω plate resistance. Commonly used in preamp applications. Creamy tone. Early DHT magic.
APPLICATIONS
Voltage amplifierLine stage
Generic triode preamp stage
• Hi-Fi stereo• Headphone amp
HISTORY
Introduced1926ManufacturerRCA·GEEquivalentsUX-226, CX-326
Pre-WarSPECIFICATIONS
Heater Voltage1.5V
Heater Current1.05A
Max Plate Voltage180V
Max Power1.5W
Sensitivity1.1 mA/V
Gain Factor8.3
Internal Impedance7.5kΩ
PinoutUX-4
Era1926
RarityCollector
SPICE model not yet available. Loadline calculator requires calibrated Koren parameters.