Ampera
6EM7
Dual Triode · IHT · 9-pin Noval · 1957
“Dissimilar dual. One-tube SET amp possible.”
Power triode delivering 10W for push-pull and SET designs
GAIN FACTOR0
PLATE IMPEDANCE0Ω
TRANSCONDUCTANCE0mA/V
GAIN68%
POWER25%
DRIVE99%
LINEARITY66%
EXECUTIVE SUMMARY
The 6EM7 is a dual indirectly-heated triode from RCA·Sylvania·GE, introduced around 1957. It provides a gain factor (μ) of 68 with 750Ω plate resistance. Commonly used in driver + power applications. Dissimilar dual. One-tube SET amp possible.
APPLICATIONS
SET outputPush-pull outputHeadphone outputHigh-gain preampPhase splitter
Generic triode driver + power stage
• Hi-Fi stereo• Headphone amp• Studio/recording
HISTORY
Introduced1957ManufacturerRCA·Sylvania·GEEquivalents6EA7, 6GL7
Golden AgeSPECIFICATIONS
Heater Voltage6.3V
Heater Current1.8A
Max Plate Voltage400V
Max Power10W
Sensitivity7.2 mA/V
Gain Factor68
Internal Impedance750Ω
Pinout9-pin Noval
Era1957
RarityCommon
SPICE model not yet available. Loadline calculator requires calibrated Koren parameters.