Zender Johan 1635 Khz Zender Johan is on 1635 Khz at 0625 Utc with SINPO 44433 in United Kingdom. Later at 0655 Utc on 1645 Khz. 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