Quote:
Originally posted by Eric H
. . . I didn't know they went that big! . . . They seem to have disappeared suddenly like the Dinosaurs though.
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Eric,
Surely you haven't forgotten Du Mont's round metal 30BP4, used in the Royal Sovereign!
I have a book on picture tubes that states the metal tubes were easier to manufacture on high speed machinery, had lighter weight, and were expected to cost less. The cost saving did not materialize, and once the all-glass rectangular tubes were being produced in quantity, they were cheaper to make than the metal ones.
