Ampera
RE604
Triode · DHT · 4-pin European · 1929
“Legendary German DHT. Cinema heritage.”
Power triode delivering 10W for push-pull and SET designs
GAIN FACTOR0
PLATE IMPEDANCE0kΩ
TRANSCONDUCTANCE0mA/V
Cgk0pF
Cgp0pF
Cpk0pF
GAIN6%
POWER25%
DRIVE99%
LINEARITY95%
EXECUTIVE SUMMARY
The RE604 is a directly-heated triode from Telefunken, introduced around 1929. It provides a gain factor (μ) of 6 with 1500Ω plate resistance. Commonly used in power (se) applications. Legendary German DHT. Cinema heritage.
APPLICATIONS
SET outputPush-pull outputHeadphone output
Generic triode power (se) stage
• Hi-Fi stereo• Headphone amp
VS AD1
HISTORY
Introduced1929ManufacturerTelefunkenEquivalentsAD1
Pre-WarSPECIFICATIONS
Heater Voltage4V
Heater Current0.6A
Max Plate Voltage250V
Max Power10W
Sensitivity3 mA/V
Gain Factor6
Internal Impedance1.5kΩ
Pinout4-pin European
Era1929
RarityLegendary
Input Capacitance4pF
Miller Capacitance5.5pF
Output Capacitance3pF
SPICE model not yet available. Loadline calculator requires calibrated Koren parameters.