Hello Group, This is off topic but I know there are experts in this group. I am the amateur radio sector representative of Radio Spectrum Advisory Committee (RSAC) of Telecommunication Authority of Hong Kong. RSAC is an official advisory committee under the Hong Kong Government. http://www.ofta.gov.hk/en/ad-comm/rsac/main.html The Asia Pacific Telecommunity is now having its meetings in Hong Kong. http://www.aptsec.org/ One of the discussion is related to WRC 2012 Agenda item 1.23 about the allocation of a 15Khz segment within 415-526.5Khz for amateur services. As a representative of RSAC, I am now attending the discussion group for the Agenda item 1.23. Propagation in this band is primarily by means of ground wave,so availability of this band for the amateur service may provide a useful extension of the capability of the amateur service to provide disaster notification and relief communications on a wider area basis than is normally provided by the VHF or UHF bands that form the main-stay of amateur disaster relief communications.
My questions are : 1. practically speaking, apart from huge traditional wire antenna, are there any other antennas of managable size (also reasonable efficiency) which can be easily set up under distress situation? 2. to make communciations of say within 200-300km, what ERP is required? 3. for a segment of 15Khz, voice communciation seems quite restrictive. How efficent will it be under digital mode (not CW) such as Pactor? I must admit that I am not a radio man by profession and have limited knowledge on MF radio operation. I am looking forward to your advice and apologise for the band width in this mail reflector. 73 Johnny VR2XMC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html