Duelund Coherent Audio production insights. In the photos internals of Duelund RCA paper plug internals being made, CAST Cu capacitor production, Duelund Siemens type paper-in-oil capacitors insides, a stack of Duelud copper foil capacitors, Duelund Siemens type paper-in-oil capacitor 10uF after 4kv test and copper foil capacitor winding.
