The 6DE7 is a 9-pin miniature dissimilar twin triode engineered specifically for vertical deflection oscillator and output stages in vintage television receivers. It features two unequal triode sections within a single noval envelope: Section 1 acts as a low-power oscillator, while Section 2 functions as a heavy-duty vertical deflection output amplifier capable of handling high peak currents. Operates on a 6.3V heater and fits standard 9-pin noval sockets. Available NOS and tested used.