Apparatus for transcutaneously transferring an amount of energy to an implantable orthopaedic device (14) includes a primary coil (12). The primary coil (12) has a resonant frequency matched to a resonant frequency of a secondary coil (16), which may form part of the implantable orthopaedic device (14). The primary coil (12) may have an aperture configured to receive a portion of a patients body (18) or may include a substantially "C"-shaped core. A power circuit (22) may be coupled with the primary coil (12) to provide power to the coil. The apparatus may also include a wireless receiver, a measuring device, and a display.
