The NBTVA is a British association largely consisting of radio and electronics hobbyists who build cameras and televisors based on John Logie Baird's 30-line TV standard.

Machines vary from reproductions of original designs, using mechanical scanning discs, to modern electronic or computerised devices.

There is an annual convention, held in Loughborough in April, and there is a CD available of video made there, with audio on one channel, and video on the other - the NBTVA video standard is such that all the video information fits into an audio signal.

Although Baird's standard was 30-lines, the NBTVA standard is 32-line for convenience, with an aspect ratio of 3:2 in portrait format.


Sources:
NBTVA Convention Video CD,2000
http://www.nbtv.wyenet.co.uk/
Bizarre Leisure, Stephen Jarvis

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