Look up the crazy stuff that happened with ICE/ISEE-3. NASA had disposed of the high power transmitter that was originally used for communication with it (and o

Look up the crazy stuff that happened with ICE/ISEE-3. NASA had disposed of the high power transmitter that was originally used for communication with it (and other satellites of that era). When it came back around, it fell to civilians to try and reach out to it. The initial contact was made with Arecibo Observatory and a high power amplifier built out of repurposed cellular tower equipment. Fun times :)