PP6/400
Triode · DHT · UX-4 · 1935
“British military variant.”
High-power directly-heated triode for single-ended amplification
Datasheet ↗SPICE
GAIN FACTOR0
PLATE IMPEDANCE0kΩ
TRANSCONDUCTANCE0mA/V
GAIN5%
POWER63%
DRIVE98%
LINEARITY95%
TYPICAL OPERATING POINT
EXECUTIVE SUMMARY
The PP6/400 is a directly-heated triode from Osram, introduced around 1935. It provides a gain factor (μ) of 4.5 with 1800Ω plate resistance. Commonly used in power (set) applications. British military variant.
APPLICATIONS
SET outputPush-pull outputHeadphone output
Generic triode power (set) stage
• Hi-Fi stereo• Headphone amp
VS PP5/400
HISTORY
Introduced1935ManufacturerOsramEquivalentsPP5/400
Pre-WarSPECIFICATIONS
Heater Voltage4V
Heater Current1.5A
Max Plate Voltage400V
Max Power25W
Sensitivity2.5 mA/V
Gain Factor4.5
Internal Impedance1.8kΩ
PinoutUX-4
Era1935
RarityRare