Hello, I am looking for a source for ground radial wire. I have heard that #18 insulated is enough, perhaps enameled copper. What is a good source to purchase such wire? The THHN at Lowes is a bit more than $0.09/ft for #14. Hoping to do better than that. Saw a reel of #18 at hamfest, 2000' for $95, I guess I should have bought it! 73's Glen K4KV