30m Frequency

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30m Frequency

Hi. I recently bought a new Yaesu FT-DX1200 radio and have been experimenting with WSPR on 10MHz. I note that the Dial frequency published is 10.1387MHz, but using USB data mode I receive no signals on that frequency. However if I go 1KHz up to 10.1397MHz I can receive lots of signals. Using a 1.5KHz modulation this puts my transmit signal at 10.1412MHz. However the reports I get whilst on this frequency put my transmit 1KHz lower at 10.1402MHz. Anyone know what might be going on here? Thanks, Alan.