Testing the boundaries

When I was younger and fitter, I enjoyed experimenting "at the boundaries".  These days I cannot do that much.

In the past I have enjoyed amateur radio below 10kHz, over the horizon with 481THz red light, experimenting with earth-electrode antennas, earth-mode VLF TXing with 5W, 8m, extreme QRP, etc.. Most of my fun has been pushing the boundaries.

Sadly, few in our hobby are interested these days, which is sad. At the moment I try to do things I can experiment with at home. I just wish I was younger and fitter!