Materials matter: copper resists corrosion and conducts well

https://www.scribd.com/document/1026217026/The-History-of-ElectroCulture-Old-Ideas-New-Applications-210708

Materials matter: copper resists corrosion and conducts well, while galvanized steel is cheaper but heavier; choose durable wood or bamboo for masts, and avoid treated lumber that may leach chemicals.