The AVVT PX25 is only available with mesh plates. This tube is an exact replacement for the original Marconi PX25. Features
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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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(Includes tube base) |
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Weight |
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For further information about our products, please visit http://www.jacmusic.com
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 cold ends of the filaments do not
have a very good function, and cause distortion. The AD100 does not use
this part of the tube, and the emitted electrons by 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. 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 bulb with a metal Tag |