472kHz WSPR RX

I have just gone QRT on 10m and 6m and am now active on 630m (472kHz) WSPR RX with the earth-electrode "antenna" in the ground and with a preamp in circuit.

UPDATE 1952z:  G8VDQ (93km) was spotted a couple of times on 6m WSPR before I went QRT on that band. On 472kHz (630m) I have already spotted several DX stations including EA5DOM (1525km).