Sub 9kHz amateur radio

These days a dedicated bunch of amateurs continue to "push the envelope" by experimenting below 9kHz. At one time though getting outside the garden would be seen as amazing with the small antennas and low powers possible by amateurs. In actual fact amateurs have crossed the Atlantic! Although I don't claim to be always up to date, I try to be on my sub-9kHz website. If you are interested, take a look.

One myth is you need big antennas. On TX this helps with radiated signals, but on VLF RX they can be very small. An E-field probe just a few centimetres long can be very effective.