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25CD6GB is a type of tube manufactured by Electronics Industries Co., Ltd. The tube is a double-ended glass-bodied 6-Band Ceramic Aspirator Diode-rectifier, used primarily in TV receivers, radios and audio amplifiers. This particular type of tube is rated at a maximum current of 600mA and a voltage rating of 25V. It features two cathodes, two grids, one anode and one plate connection, and is a screw threaded base type. The 25CD6GB tube is a compact device, measuring 25mm in length and 11.5mm in diameter. It is especially useful due to its multitude of uses such as tube amplifiers, voltage regulators, and rectifiers. Not only this, but the 25CD6GB being a ceramic aspirator diode-rectifier makes it more reliable than other types of diodes.