TV designs rarely used in place of sweep tubes-a challenging high-power and high-speed application-until the 1970s. One of the largest-volume post-WWII applications was in the basic design of television sweep power tubes, starting with the 6BG6G (1946), a modified. Variations Early variations included transmitting tubes such as the (1937) with 6.3V heater, plate (anode) connected to a top cap, and equivalent 12.6V 1625, the smaller (1936), the many KT versions marketed in Europe, and a subsequent vast array of audio and RF power tubes.
A 'W' in the descriptor, as in 6L6WGB, identifies the tube as designed for mechanically rugged environments, such as military or airborne use. The original metal version was rated for 19 watts dissipation while the later 6L6GC is usually rated for 30 watts.
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