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After building a Nipkow mechanical television I plan to build more and experiment with mirror drums and so. What I missed was a generator that can produce several test cards in all frame rate’s and lines. The design took some time, but the proto model is finished. This generator will produce composite video signal pos / neg max 2v pp. from 5 frames to 30, interlaced or normal. Per frame is selectable the number of lines from 10 to 70. Special is the grey / gamma test card, for adjusting en testing the optical part of a mech televison.