The coil is would on a moulded plastic ring and mounted on
a tabular plated metal handle through which pass the 1 m long
flexible leads. Would with insulated copper wire, the coil
has a resistance of 1.8 ohms approx. The mean dia 34 mm and
the number of turns 100 are clearly marked on the coil former.
Dimensions 150 * 40 * 60 mm.