On October 1st over the chronic interference to the 40m band in Region 3, The Radio Amateur Society of Australia (RASA) wrote to the President of the IARU.

The great majority of the intruder stations speak Indonesian and do not identify. They operate in the bottom half of 40m, using USB, often in 10 kHz multiples.

Darwin, Australia

These stations are received repeatedly in Darwin, Australia and every afternoon/evening in the remainder of the Australian continent.

These stations are received repeatedly in Darwin, Australia. Then, every afternoon and evening in the remainder of the Australian continent.

These stations are what’s causing harmful interference to Australian amateur stations.

They would also be causing harmful interference to amateur stations right across SE Asia, Papua New Guinea and Micronesia.

Creds to SkyTicket.com

RASA first reported this problem to the IARU Region 3 Chairman two years ago.

Illegal stations

In the intervening period, the interference has increased in severity. It appears that the popularity of digital modes around 7065-7075 kHz is forcing the illegal stations down into the CW segment below 7050 kHz.

RASA again reported this issue to the Region 3 IARU Chairman on the 2nd of September, but have not received a reply.

RASA approached the Australian regulator, the ACMA, last year on this issue, and asked them to conduct their own monitoring, with a view to a formal complaint through the ITU processes. 

Unfortunately, RASA were advised that, due to staff cutbacks, ACMA were unable to conduct the essential monitoring.

Resolving the Issue

In the absence of formal Government regulatory action, RASA’s view is that the IARU, as the regional umbrella organisation, should take a proactive role in resolving this issue.

RASA suggested in their letter to the IARU President that IARU and the Indonesian national amateur radio society formulate a plan of action and offered to assist as required.