Ampera
7044
Dual Triode · IHT · 9-pin Noval · 1958
“Industrial computer dual triode. 5687 family.”
Medium-gain triode for driver and line stage applications
GAIN FACTOR0
PLATE IMPEDANCE0kΩ
TRANSCONDUCTANCE0mA/V
GAIN17%
POWER9%
DRIVE98%
LINEARITY92%
EXECUTIVE SUMMARY
The 7044 is a dual indirectly-heated triode from Sylvania, introduced around 1958. It provides a gain factor (μ) of 17 with 2000Ω plate resistance. Commonly used in driver / preamp applications. Industrial computer dual triode. 5687 family.
APPLICATIONS
Voltage amplifierLine stagePhase splitter
Generic triode driver / preamp stage
• Hi-Fi stereo• Headphone amp
VS 5687
HISTORY
Introduced1958ManufacturerSylvaniaEquivalents5687, 6900
Golden AgeSPECIFICATIONS
Heater Voltage12.6V
Heater Current0.45A
Max Plate Voltage330V
Max Power3.75W
Sensitivity8.5 mA/V
Gain Factor17
Internal Impedance2.0kΩ
Pinout9-pin Noval
Era1958
RarityModerate
SPICE model not yet available. Loadline calculator requires calibrated Koren parameters.