15FY7 is a kind of tube used in the electronics industry. It is a dual triode vacuum tube with a 9-pin configuration, and is typically used for audio and radio amplifiers, switching circuits, preamplifiers and phono preamplifiers. It is a miniature type preamplifier/amplifier tube commonly used for high-gain communication applications. It has a high gain-bandwidth ratio that makes it suitable for wide variety of applications and is able to operate at high frequencies. Its rated plate dissipation is 500mW, maximum plate voltage 300V, and maximum plate current 20mA. It has a universal pinout, which means its heaters can be powered in either series (6.3V) or parallel (12.6V).