BBC World Service at last has some details on the special half hour
Antarctic Midwinter Broadcast tonight:

http://www.bbc.co.uk/worldservice/pr...ic_midwinter_\

special_2010.shtml

The broadcast can be heard in the South Atlantic on Monday 21 June at 21:30 -
22:00 GMT on the following short-wave frequencies:
5950 kHz (49 metre band)
7295 kHz (41 metre band)
7360 kHz (41 metre band)

First broadcast 21st June 2010

(can also listen to the programme via this link)

Via Alan Pennington, DXLD
Caversham, UK

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dxAce
Michigan
USA