Keith Hamer is a TV memorabilia collector and fan of the test card A TV enthusiast from Derby who specialises in collecting screen test cards has welcomed the return of the girl and clown card which ...
A Test Card shows how accurate reproduction of a signal is: Here's an example (which contained the link I followed, all about the BBC Test Card) So, what about the BBC's "new" (as of 7 years ago) Test ...
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