G3XBM (Roger): Just one slot of WSPR - 15 reports on 472kHz!

Reports in just one 2 minute WSPR time slot with 100mW ERP on 472kHz

With the improved performance from a 9m long Marconi antenna on 472kHz, these were the reports I just got in one single time slot just now. 15 unique stations reported me! It is too easy, even with just 100mW ERP.