DO24
Triode · DHT · Special · 1935
“German transmitting DHT.”
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 DO24 is a directly-heated triode from Telefunken, introduced around 1935. It provides a gain factor (μ) of 3.5 with 1170Ω plate resistance. Commonly used in power (set) applications. German transmitting DHT.
APPLICATIONS
SET outputPush-pull outputHeadphone output
Generic triode power (set) stage
• Hi-Fi stereo• Headphone amp
HISTORY
Introduced1935ManufacturerTelefunkenEquivalentsNone
Pre-WarSPECIFICATIONS
Heater Voltage4V
Heater Current3.6A
Max Plate Voltage500V
Max Power25W
Sensitivity3 mA/V
Gain Factor3.5
Internal Impedance1.2kΩ
PinoutSpecial
Era1935
RarityRare