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2006 News Releases




VHF data weak signal segments

Date : 18 / 10 / 2006
Author : Glen Dunstan - VK4DU

Over the past few years, tremendous advances have been made in weak signal communications on the VHF and UHF bands using computer generated data modes.

"These modes enable communications at or below the noise floor. Amateurs with modest stations are now making contacts over thousands of kilometers via EME and Meteor Scatter using these new modes"., WIA Director, Glenn Dunstan VK4DU said.

"However, often these very weak data signals can not be detected by ear, which makes them incompatible with normal analogue SSB or CW signals. There have been instances of interference caused by SSB operators who obviously can't hear the data signals".

Should there be specific data sub bands, and, if so, where should they be?

"The WIA seeks your comments on the suitability of VHF and UHF weak signal data sub bands. If there is sufficient support, we will modify the respective band plans to accommodate these new segments." Glenn said.

Please send your comments by email to Glenn at


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