This unit is based on surplus Bluetooth modules and provides a combined source, and level meter for the 13cm band. It can also  provide test signals via harmonics for both the 10GHz and the 24GHz amateur bands.

This innovative project came from the golden rule of Ham radio “what else can we use those for?” Following a failed commercial project, a quantity of high quality WT12 Bluetooth modules became available. With the help of a very talented embedded software engineer, the VCO, PLL, PA & RX on-board the silicon yielded to software control and this project was born.

The project took the Construction Competition title at the Scottish Microwave Roundtable (GMRT) November 2017

The full write up by the designer, Kevin G3AAF is on PDF here.