Maybe you remember this? I don’t.
I think it was a crystal set. I am not sure it was sold in the UK. Was this in the 1950s or 1960s?
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.
Maybe you remember this? I don’t.
Solar flux is 111 and the SSN 58. A=4 and K=1.