Re: Test Card F
I always preferred test card F to the electronic, though more technically accurate, cards. I also found that you could get easily misled with a crosshatch generator, and TCF used to make you concentrate on the centre of the screen which is where most people focus. It would take seconds to set up the static convergence and focus, even if the X wasn't quite at the centre (well, most TVs of the time wouldn't get it absolutely central anyway), and you could easily get the flesh tones accurate to the eye, if not to a vectorscope. Plus you got jaunty music!
The odd green of the clown is open to debate. I thought it was to assist in setting up CDA decoders and just stayed with us. Not sure why 'proper' green wasn't used.
But as to Carole's 'bump', I have no idea.
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