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The Penta Laboratories PL8877/3CX1500A7 is a rugged ceramic and metal power triode designed for use as cathode driven Class AB2 or Class B amplifier in audio or rf applications including the VHF band, or as a cathode driven plate modulated Class C rf amplifier. As a linear amplifier, high power gain maybe obtained without sacrifice of low intermodulation distortion characteristics.Low grid interception and high amplification factor combine to make the PL8877/3CX1500A7 drive power requirements exceptionally low for a tube of this power capacity.