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What radio components do I collect to extract precious metals? Capacitors that contain palladium, platinum, silver, tantalum, niobium. Transistors, microcircuits, connectors, diodes that contain gold. Most of all, precious metals were used in radio components that were used in the assembly of computing equipment, military and medical equipment, as well as in old household appliances. You will learn the prices for receiving radio components from this video.