PX25 Osram balloon audio triodes CV1040 DO24 P27/500 PP5/400 tall glass pair tested 100%

Osram PX25 balloon £ 1100 pair

Description

AudioMagical introduces most of all PX25 type made from 1932 up to the 1960s

The PX25 is a output valve like a PX4 but with higher output and Anode Voltage.

Pair Osram PX25 power amplifying valve of extremely high efficiency designed with a large power handling capacity to supply considerable undistorted volume. 

They intended for use in the last stage of Low Frequency Amplifiers where provision is made for adequate high tension supply. When operating the PX25 valve, arrangement should be made for sufficient air circulation to prevent over-heating

Filament Voltage 4

Filament Current 2 amps 

Anode Volts 400

Grid Volts -31

Anode Current Average 62

Anode Dissipation 25 Watts

Mutual Conductance  mA/V 8

 

Tested with AVO VCM 163

PX25 Osram {1} 49mA 100% emission mA/V 7

PX25 Osram {2} 50mA 100% emission mA/V 7.1

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