These were photographed by a friend earlier this week in Letchworth.
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.
One of the pleasures of Cambridge is gliding along the back of the colleges on a punt on the river Cam. Many prefer others to do the puntin...