Abstract :
A laboratory method of making helical waveguides suitable for short-term field tests has been devised and used to produce an experimental run of waveguide. The method involves the use of an extractable mandrel and a winding process in which the turns, as they are wound, move the winding carriage along automatically. The wound helix is set in a plastic jacket. Problems connected with the manufacture have been analysed and means of improving the final product devised. The waveguides are joined by sticking after being aligned with a precision mandrel.
