Radio Waves International Relay 28th of June 2020 1800 Utc 3955 Khz Radio Waves International Relay 28th of June 2020 1800 Utc 3955 Khz. Info via Twitter Share this: Click to share on X (Opens in new window) X Click to share on Facebook (Opens in new window) Facebook Click to email a link to a friend (Opens in new window) Email Click to print (Opens in new window) Print Related