Radio Australia carries the following information on its website:
Please note that some shortwave frequencies will be temporarily unavailable due to transmitter maintenance on Wednesday 21 April at 2200 UT until Thursday 22 April at 0600 UT.
During this period English services on the following frequencies will be unavailable:
Central Pacific: 15515, 15560, 17715, 17795 kHz
South West Pacific: 15230, 15240 kHz
PNG: 13690, 21725 kHz
South East Asia: 15415, 17750 kHz
The shutdown will also affect Indonesian services to eastern Indonesia on 11695 and 15415 kHz in the 25 and 19 metre bands.
Please note that some shortwave frequencies will be temporarily unavailable due to transmitter maintenance on Wednesday 21 April at 2200 UT until Thursday 22 April at 0600 UT.
During this period English services on the following frequencies will be unavailable:
Central Pacific: 15515, 15560, 17715, 17795 kHz
South West Pacific: 15230, 15240 kHz
PNG: 13690, 21725 kHz
South East Asia: 15415, 17750 kHz
The shutdown will also affect Indonesian services to eastern Indonesia on 11695 and 15415 kHz in the 25 and 19 metre bands.
(Source: Radio Australia/R Netherlands Media Network Weblog)