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NBTV - Trevor Hill in 1974 - 32 lines, 12.5 pictures/second

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Uploaded on May 3, 2009

Narrow band television, 32-lines, 12.5 pictures per second, recorded on open-reel audio tape, late 1974. The late Trevor Hill, seen on the screen here, was 17 years old and I was 20. I used a CRT flying spot scanner with the raster pattern projected through a lens onto Trevor's face in a darkened room, to feed video signals into one channel of an open reel audio tape running at 7.5 ips: the sound was recorded on the other channel of the stereo pair. A Revox A77 recorder was used and the light pickup was via a 931A photomultiplier tube. Trevor later became a pioneer of personal computing in Australia, unfortunately passing away at the premature age of 48 in 2005. These days, I carry on the administration of Trevor's website: http://www.cylindersontheweb.angelcit...
My own voice can be heard controlling the recording process in the background. We used no sync pulses on this system, so that the picture "floats" rather badly in the vertical direction, and the vertical streaking is a function of phase shift of the video below 100 Hz. Nevertheless, for an experimental home video recording made 35 years ago, the results could be worse! This is the oldest surviving video recording of Trevor, like myself, an early member of the Narrow Band Television Association (NBTVA), refer: http://www.nbtv.org

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