Stimulated Brillouin scattering happens in a plasma when an electromagnetic wave pushes free-floating electrons out of its path, causing the wave’s energy to interact with the surrounding particles. These particles then generate a sound wave within the ionosphere and shift the frequency of the original electromagnetic wave. Previous studies have shown this effect near the edge of the ionosphere. This study investigates whether the effect can be triggered within the ionosphere using a satellite signal and a very strong ground-based high-frequency radio transmitter. Using off-the-shelf electronics and the University of Alaska’s HAARP facility, three experimental campaigns were conducted. While no clear evidence of Brillouin scattering was found, unexpected bursts of high-power radio signals and strange mixing effects were detected.