Not everyone, of course, had to be a theorist. Many would have been those already experienced in matters such as radio valves, cathode ray tubes for B-scopes and the PPIs, aerial design etc and could well have been moved from team to team and project to project as their particular abilities lay.
Not every artisans name ends up in th history books. None of those who actually built the first steam engine or parts for the first radar are remembered.
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