Oldest Known US Radio Amateur, Cliff Kayhart, W4KKP, SK at 109 http://www.arrl.org/news/oldest-known-us-radio-amateur-cliff-kayhart-w4kkp-sk-at-109 Share this: Click to share on X (Opens in new window) X Click to share on Facebook (Opens in new window) Facebook Click to print (Opens in new window) Print Related