The old TA-200 aerials are made of a hard rubber and eventually degrade over time... when this happens the wire aerial can be left exposed and vulnerable to being bent and compromising performance.

This replacement aerial is designed to be printed vertically with supports needed for only the lower section (this can be achieved by adjusting your slicer options to only print supports for areas of a 60 deg overhang or greater - as the top internal of the aerial is tapered and does not need support). I print it with a brim to help bed adhesion - as its a small surface area at the bottom.

Once printed, remove the brim, carefully remove the support for the lower part of the aerial and then to fit into the radio undo the 2x Torx-9 screws in the battery box, undo the torx screws for the circuit board and remove them from the casing. Then remove the existing aerial and any remaining old rubber ... you should be left with an aerial of copper wire... this now should slide snugly into the replacement you have printed. Slip the 'new' aerial over the screw lug on the front casing - ensuring that the little loop of aerial sits ontop of the screw lug (in the same way it was mounted originally) and then re-assemble the radio circuit boards and then the back case.

I've made my replacements from PLA, and so-far they have held up well - but I have also set my slicer options to be wall thickness of 4mm so that there is no in-fill to give the maximum chance of not being too week.

[next time I replace an aerial, I'll try and take some pictures to explain and show how it goes together]