46
Triode · DHT · UX-5 · 1931
“Dual-grid power tube. 45 cousin in triode mode.”
Low-mu triode with excellent linearity for driver and line stages
GAIN FACTOR0
PLATE IMPEDANCE0kΩ
TRANSCONDUCTANCE0mA/V
GAIN6%
POWER14%
DRIVE98%
LINEARITY95%
EXECUTIVE SUMMARY
The 46 is a directly-heated triode from RCA·Sylvania, introduced around 1931. It provides a gain factor (μ) of 5.6 with 2400Ω plate resistance. Commonly used in power (set) applications. Dual-grid power tube. 45 cousin in triode mode.
APPLICATIONS
Push-pull output
Generic triode power (set) stage
• Hi-Fi stereo• Headphone amp
HISTORY
Introduced1931ManufacturerRCA·SylvaniaEquivalentsNone standard
Pre-WarSPECIFICATIONS
Heater Voltage2.5V
Heater Current1.75A
Max Plate Voltage250V
Max Power5.5W
Sensitivity2.3 mA/V
Gain Factor5.6
Internal Impedance2.4kΩ
PinoutUX-5
Era1931
RaritySought-after
SPICE model not yet available. Loadline calculator requires calibrated Koren parameters.