Here’s a simple 3D printable design for a dipole feeder with a tripod thread built in the back. It takes a hex M4 screw as attachment points for the actual dipole arms and as the coax feed point. The dipole arms are 12mm solid aluminium rod(all i could find at the time…) center tapped with an M4 thread
Determining dipole arm lengths for various frequencies is a topic for another article as it involves some simulation and measurements.
Here’s an example of what an optimization sweep looks like:
