When there are stations active both 6m and 10m seem to support GDX by a combination of tropo and aircraft reflection out to about 200km. It needs planes in the right places but today's results bear testimony to this. This evening G4CUI (172km) has spotted me many times on 10m. I am using just 500mW on 10m WSPR and 1W on 6m. Sometimes the RX traces show multiple paths and Doppler suggesting that aircraft reflection is involved.
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