What are good and bad WSPR frequencies in EU for 137 kHz? I believe there are issues with QRM from / to OPERA but I can find no information on exactly what range OPERA uses. I have been running on 13
There are issues, i.e. sidebands from DCF39! Best is stay above 1618 Hz, i.e. 137.618 kHz. 73, Stefan Am 21.02.2018 21:29, schrieb N1BUG: What are good and bad WSPR frequencies in EU for 137 kHz? I b