472kHz WSPR RX last night

As my earth-electrode antenna was broken, I used the coax outer to my 2m big-wheel via a ferrite rod as the antenna. 15 different stations were copied with the furthermost OH1LSQ (1733km). In all, 7 countries spotted. 

This proves that for RX nothing special is necessary. BTW the only ground was the mains plug! I guess the coax to the big-wheel is about 10m long and only 5m above the ground at its highest. The coax is just 0.5m above the ground near the shack. As I said nothing special at all!