472kHz WSPR (10mW ERP)

For over an hour now, I have been on 472kHz WSPR (20% TX, 80% RX, 10mW ERP). What surprises me is how few UK stations appear to be active on 472kHz WSPR TX. At the moment it appears there are only two of us!

Surely my ultra-simple system proves that with WSPR you do not need big antennas or high power. Several spots already on RX and TX. I shall be on overnight. As usual, I am using the earth-electrode "antenna" in the ground.