Gadge has now supplied most of the component details, including the coil winding data both for the feed coil (inside the flywheel) and the transformer, or HT, coil (inside the earphone unit). I'd have thought it would be both more authentic and more practical to retain the original design, rather than have an HT wire a yard long, passing through a fake earphone unit, now that the component details are available. Remember, Phillips used to make replacement earphone units for the aftermarket. Their version was extraordinarily ugly, but shows it can be done provided you have access to the patent information (as we now do, thanks to Gadge).
