Description
The 2A3 is a three-electrode, high vacuum type of power amplifier tube or valve for use in the power-output stage of A.C. operated receivers.
The 2A3 has also been used on HI-END amplifiers with stunning results.
We are proud to show some of the best 2A3 variations.
The exceptionally large power-handling ability of the 2A3 is the results of its design features. Among these are its extremely high mutual conductance and its large effective cathode area.
Filament voltage 2.5 Volts
Filament current 2.5 Amps
Plate Voltage 250 Volts max
Grid Voltage -45
Plate Current 60mA
Mutual Conductance 5.2 Sylvania 2A3 with green leaf on base and etched lettering on base.
All four 2A3 valves have same design with suspended top rods to keep plate upright and wide top mica
Like all 2A3’s great audio valves!
Tested with AVO VCM 163:
Sylvania 2A3 55mA 100%
Sylvania 2A3 52mA 1005
Sylvania Engraved base 53mA 100%
Sylvania Engraved base 53mA 100%
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