Ampera
RS241
Triode · DHT · 4-pin European · 1932
“DHT transmitting triode. Wehrmacht heritage.”
Power triode delivering 15W for push-pull and SET designs
GAIN FACTOR0
PLATE IMPEDANCE0kΩ
TRANSCONDUCTANCE0mA/V
Cgk0pF
Cgp0pF
Cpk0pF
GAIN18%
POWER38%
DRIVE95%
LINEARITY91%
EXECUTIVE SUMMARY
The RS241 is a directly-heated triode from Telefunken, introduced around 1932. It provides a gain factor (μ) of 18 with 5000Ω plate resistance. Commonly used in power (se) applications. DHT transmitting triode. Wehrmacht heritage.
APPLICATIONS
SET outputPush-pull output
Generic triode power (se) stage
• Hi-Fi stereo
HISTORY
Introduced1932ManufacturerTelefunkenEquivalents4C5
Pre-WarSPECIFICATIONS
Heater Voltage4V
Heater Current0.6A
Max Plate Voltage400V
Max Power15W
Sensitivity3.6 mA/V
Gain Factor18
Internal Impedance5.0kΩ
Pinout4-pin European
Era1932
RarityCollector
Input Capacitance7pF
Miller Capacitance4.5pF
Output Capacitance5pF
SPICE model not yet available. Loadline calculator requires calibrated Koren parameters.