That’s right Australia to Oklahoma on 630 meters 13442 km.You can go to wsprnet.org , MF band and plug in the callsigns.My experimental call is WG2XXMBoth stations running 5 watts erp.The rig is a K3 with home brew power amp and no rx pre-amp.Antenna is 60 ft vertical with top and bottom loading. Tu 73 Ken K5DNL