1940 Woman yelling
1947 No Kings SSTV mixed with audio, which doesn't work very well.
1950 Man yelling, mentions of Boston
1953 Man talking, "no kings, no tyranny". Not a very strong signal, but very low noise levels, so good reception overall.
1956 More SSTV, still audio. It's possible the SSTV is from another station, although the content aligns with the audio, so I don't think it's an attempt to jam?
2002 Song
2007 Stronger signal now.
2009 Off