The AV 2A3M is a Mesh Version of the AV 2A3-C37. Mesh plates are not made of solid nickel, but are made of nickel wire ( picture: six times enlarged) The AV 2A3M is electrically identical with normal 2A3 tubes. All AVVT Tubes have a warranty period of 5 years, when ordered via official distributers. This tube uses AVVT's unique Open Filament structure, resulting in high linearity, even at the maximum output voltage. (Note1) Features
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Cobalt mesh
This lights up emerald green in the dark (Note4)
Night Picture
with courtesy of Moth Audio
Blue Glass
Version
Limited availablity. Pls. Inquire
Click here for measured Characteristics
Tube curves with courtesy of AMR
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Filament Voltage |
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Filament Current |
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Plate Voltage |
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Plate Current |
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Plate Dissipation |
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Power Output in Class A |
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Plate Voltage |
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Plate Dissipation |
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Plate Current |
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Grid Voltage |
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Plate Impedance |
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Amplification Factor |
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Transconductance |
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Load Impedance |
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Grid Resistor |
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Operating Lifetime |
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Size |
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Weight |
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For further information about our products, please visit http://www.jacmusic.com
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Note 1) Open Filaments
means, the filaments and the grid are longer than the Plate, and stick
out on both ends for about 5...8mm. The not fully warm ends of the filaments
do not have a very good function, and cause distortion. This tube doesn't
use this part of the filaments. Emitted electrons from the "cold"
ends, will bypass the Plate, and land on the glass. At maximum Power this
may cause fluorescent, blue glow on the tube glass inside. Mesh tubes
may develop a fluorcescent blue glow om the Plate. See also
our Tech Brief on Blue Glow
in Tubes.
Note 2) Hard-metal filaments are operated at much higher temperature than normal tubes. This tube will glow bright orange, instead of the dark orange color of nickel filament tubes. Note 3) Individual Test data, such as: Matching Data, Grid Current, Vacuum, Filament Current, etc, are on the Certificate that comes with each individual Tube. Each tube is numbered, inside the glass with a metal Tag Note4) Cobalt Mesh lights up emerald green in the dark. These tubes may sound different than the normal mesh plates. |