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Originally Posted by mrjukebox160
Here ya go.
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Good tangent there! Zenith and some others like Fisher needed long-lived tubes for their high-fidelity console "stereos", so they went to Amperex and Mullard for tubes
This applies to some of the TV's too. A good example is the 6EH7, 6GJ7 and other frame-grid tubes made in Europe that Zenith, RCA, Motorola and others used. Japan supplied some tubes to manufacturers in the 1960s as well.