Although focused on the use of the TinySA, the techniques and equipment described in this article may be applied to using any other type of Spectrum analyzer - or even a simple receiver - for the detection of interference/noise sources or general-purpose direction-finding.Figure 1:The Tiny SA, connected to an outdoor HF antenna duringdaylight hours.  The displayed span is 2-22 MHz.Click on the image for a larger versionAbout the TinySA:The "TinySA" is a small spectrum analyzer with a 2.4" touch ...