Abstract
The first two articles in this series (Journal of Audiovisual Media in Medicine, April and July 1979) dealt with the selection and preparation required for small team productions, with particular emphasis on hardware and organization. This article, aimed again at medical auxiliaries with little or no experience of television techniques, looks in more detail at the facilities offered by the various helical scan recorders currently available. It also touches on aspects of time-base correction and editing. The final article in the series will follow the development, planning and installation of a colour television system to aid teaching in a new medical school.