If you are a Ham Radio operator dedicated for QRP (low power) work, you will certainly like (and need!) this accessory from the QRPLabs. It’s an easy to assemble 20W Dummy Load with a very useful feature - measuring the output power of the transceiver.
This video is a review of the 20W Dummy Load produced by QRPLabs company, with some measurements and tests conducted by me with some intriguing results to discover. I also explain in detail the assembly of the unit into the 3D-printed box.
The link to the printables.com for the STL files if you’d like to print your own box:
https://www.printables.com/model/394399-housing-box-for-the-qrplabs-dummy-load-project
These 2mm Banana plug sockets should fit nicely into the holes in the box, as the holes are 6mm in diameter as is the socket’s mounting part (affiliate link, I earn small commissions at no extra cost for you if you purchase through this link)
https://amzn.to/3lfCOky
Any digital, or even coil-based analogue multimeter can be used with this dummy load. I used this (affiliate link, I earn small commissions at no extra cost for you if you purchase through this link):
https://amzn.to/40XFqUT