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5881a

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只看楼主倒序阅读 0 发表于: 2007-04-06

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AlesaVaicVacuumTechnology

PX25M-GL Datasheet

The AVVT PX25 is only available with mesh plates. This tube is an exact replacement for the original Marconi PX25.

Features

AVVT's patented ribbon filaments with 16 flat Surfaces
Mesh plates
Ceramic tube base, with nickel plated brass sides.
Globe Glass bulb
Extra large getters, flashing the complete tube bottem.
Unbreakable hard-metal filaments. (Note2)

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Plate Detail
Click here for plate curves

PX25 Filament Ratings
Filament Voltage	4 Volt (AC or DC
Filament Current	2.2 Ampere

PX25 Maximum Conditions See also Note 3
Plate Voltage	500Volt
Plate Current	150mA
Plate Dissipation	25Watt
Power Output in Class A	8Watt

PX25 Typical Data
Plate Voltage	350V
Plate Dissipation	20Watt
Plate Current	57mA
Grid Voltage	-26Volt
Plate Impedance	1140 Ohm
Amplification Factor	8,8
Transconductance	7,8 mA/V
Load Impedance	3000 - 5500Ohm
Grid Resistor	max. 50k Ohm
Operating Lifetime	40.000 hours

PX25 Mechanical Data
	Size 190 x 60mm (Includes tube base)
Weight	145 Gram

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5881a

初来乍到

只看该作者 1 发表于: 2007-04-06

KR PX25

The PX25 is an ultra-linear, low frequency, high power triode tube capable of producing 6-10 watts of pure class-A power.
A replica of the early PX25, this tube is available in both a UX4 base and the original 4 pin B4 English base (PX25A).
The PX25 may just be the best of both worlds, i.e. the clear and pristine midrange of a 2A3 or 45 tube
along with the bass and dynamics of a 300B.