Case for a simple QRP broadband transformer for a half wave end fed (HWEF) Antenna. In this case, the transformer is for the 11m Band (CB-Band).
The Antenna itself is an about 0.95*Lambda/2 wire. You should a current balun into the coax about 1-2m from the transformer to the TRX. This helps to keep HF out of your shack and use the coax as counterpoise.

There is also a file with a Meshmixer Support added to the holes if required.

The top of the case can be fixed with M3 screws, but you need to drill the thread into the plastic.

Ultimaker

Ultimaker 2

No

Yes

0.15 and 0.1mm

20%

3*0.4mm perimeter layers are suggested