[Elecraft] OT: possible ham operation in the region of 415-526.5 Khz

[Matt Zilmer]

You might try a magnetic loop.  Here is a Wikipedia article with
references to others:
http://en.wikipedia.org/wiki/Magnetic_loop

73,
Matt W6NIA

On Tue, 14 Dec 2010 23:41:47 +0800 (HKT), you wrote:

>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 
>
>
>      
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