50 UX250 CX250 Tungsol Philco mono plate large shape pair audio tubes

Description

The type 50 valve is a power amplifier valve designed for use primarily in the output stage of audio frequency amplifier employing transformer coupling.

It is capable of delivering large undistorted power.

Filament voltage 7.5

Filament current 1.25

Plate voltage 400

Grid Voltage -70

Transconductance 2100

Pair of Tungol Philco Type 50 UX250 in excellent shape and both tested at 54mA and 53mA full emission