The fax chart has been received on the
2nd of June 2019 on
6328.5 kHz (center frequency). Weather fax transmissions are quite regular at
20.00 UTC (±2 minutes) and are being probably provided by
RBW41 Murmansk. Facsimile broadcasts at other time slots are also possible on this frequency: the station was observed by other DXers at 03.30, 04.50, 10.30, 13.30 and 14.50 UTC too. Unfortunately, the most of information about
RBW41 in the Worldwide Marine Radiofacsimile Broadcast Schedules by the National Weather Service of NOAA is outdated.
As the station uses inverted shift, the signal must be received in LSB mode (instead of USB) for the correct decoding. The quantity of shift is also non-standard: 1000 Hz. Other settings: 120 RPM / 576 IOC, with no APT.
The main trouble during reception of these transmissions at
20.00 UTC is the constant heavy QRM from another russian utility station on
6328 kHz using CIS-36-50 mode. One can see the disturbance as a wide white strip on the decoded chart.
RX: Degen DE-1103
ANT: 80 mb dipole
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