Never say you don't have a 70cm antenna!
See https://sites.google.com/site/g3xbmqrp3/antennas/70cm_moxon
Simple QRP projects, 10m, 8m, 6m, 4m, FT8, 160m, WSPR, LF/MF, sub-9kHz, nanowaves and other random stuff, some not related to amateur radio.
These are like college policemen, keeping order in the Cambridge University colleges like this one outside Trinity College, that I think was...