Catalogue ref: HS 7/49
A good aerial always improves the performance of a wireless set, and an agent can make use of one with little fear of detection if it is concealed in a rope clothes line or window sash cord.
The illustration on the left shows aerial disguised as a tendril in its natural surroundings.
The illustration below shows the finished clothes line aerial. This aerial is made by twisting the rope strands over the aerial: a rope making machine can be adapted to do this work. In the case of the window sash cord, the centre core of the cord is withdrawn and the wire threaded back in its place.