SOTA Beams has developed a low cost ham radio WSPR beacon. Associated with the WSPR beacon is a lowpass filter for operating the beacon on the 160, 80 and 40 meter ham bands. SOTA beams does not provide a chassis for mounting the filter PCB. This remix provides a simple chassis for mounting the PCB.
More on SOTA Beams, WSPRlite and the low pass filter can be found here.
My code modifications are not necessarily pretty but they work!
Thank you to Printbus for a great set of code to base a new box design on!