Source: QEX (Elwood Downey, WB0OEW)

The September/October 2018 QEX contains an article on building a Arduino based RF signal generator. The device has a range of 500 KHz to 40 MHz and is stabilizwed with a GPS receiver. The article title is "Simple and Accurate Variable Frequency RF Signal Generator".

QEX, September 2018, Table of Contents