>Delta
I still think delta is for NRO DELTA teams
The suggested frequencies for PSK on the Amateur Radio bands are:
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160m 1838.15 KHz
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80m 3580.15 KHz
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40m 7035.15 KHz for region 1 and region 3, and 7080.15 KHz for region 2 *
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30m 10142.15 KHz
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20m 14070.15 KHz
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17m 18100.15 KHz
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15m 21080.15 KHz (although most activity can be found 10 KHz lower)
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12m 24920.15 KHz
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10m 28120.15 KHz
https:// play.google.com/store/apps/details?id=com.wolphi.psk31