Icom IC-T70 Earpiece Retention Adapter

thingiverse

This is a piece to keep a standard size of earpiece plugs aligned with the top of the Icom IC-T70 radio. I've tried it out with several third-party 2-pin Icom handsets, monophones, earpieces and so on, and they all seem to be roughly the same in size, so there's a good chance it will fit yours too! A 1.5mm slot is cut along the side to let you slip the wire through, and up to 13 mm wide antenna bases can be used without any interference. When mounted, it retains the plug body, preventing accidental removal since you have to take out the antenna first. Update: 2017-10-14: I noticed that the FA-S270C antenna has the center pin quite far away from the edge of the original part. The updated version sits 1mm closer to the radio, but you may still need to use a file or dremel to get everything right if you want to use the original antenna. The updated part works well with all my Diamond/Nagoya/Comet third-party antennas (I tested the SRH-536, Comet SMA-24 and the Comet SMA-209 stubby). The typical SMA antenna has the center pin less than 1 mm from the bottom, while the Icom antenna center is around 2.7 mm from the bottom. I printed mine with no raft and tree-like support with the base of the part 1mm above the table. 2017-10-15: Added a detailed drawing in case someone else needs the measurements.