Tech enthusiasts are increasingly scavenging second-hand markets to refurbish vintage, high-end test equipment like the Tektronix TDS7104 oscilloscope and Rohde & Schwarz signal generators for a fraction of their original cost. By repairing aging hardware and replacing obsolete components, hobbyists are breathing new life into these powerful tools for specialized engineering tasks and high-speed data analysis. Some creators are even taking these restorations a step further by gutting the classic chassis to build custom, retro-modern personal assistants powered by AI models.