Many thanks to SWLing Post contributor, Paul Walker, who shares the following:

The shortwave transmitter site NW of Brasilia, operated by the national public broadcaster Empresa Brasil de Comunicacao for the Radio Nacional de Amazonia service, has had to make a change to its SW operating schedule.

EBC’s Radio Engineering Manager Manoel Caetano tells me, “Due to technical problems and energy costs, the Radio Nacional de Amazonias service will have reduced operating hours through at least the end of the year”

11780kHz will operate weekdays from 0745UTC to 2000UTC and 6180kHz will operate weekdays from 2000 to 0300UTC.

On weekends, 11780kHz will operate from 0900UTC to 1800UTC, while the 6180kHz frequency will remain off-air.