Hey All,
Way back in the day I used to get two path echo at times, particularly on Asian stations (ie on R. Japan FROM Japanese soil) -probably via Polar path and another route at the same time. I thought it was SOOO cool. Some of my ultimate Dx was "polished off" with an echo. If heard that effect , I knew it was from FAR away !
The other type of echo I have gotten at times ( heard it lately) is network programming being fed to two MW stations on the same frequency. "Interesting" , but not NEARLY as "mysterious" or "romantic" as a long haul dx HF echoed sky wave .
K