ISS pass between SSTV experiments, nothing heard / 2016-04-14

I saw people post more images which seemed to be from the MAI-75 SSTV program. I tried a pass at 18:27 UTC but heard nothing. Checking the article ISS Slow Scan TV in April - Amsat-UK shows that the ARISS commemorative SSTV event ended at 14 April 11:35 UTC and the first MAI-75 activity was 14:45 until 18:00 UTC. The next MAI-75 activity is Friday 15 April 14:10 until 19:00 UTC.