The highest referenced peak in SOTA – Summits on the Air, at the time of writing, is Aconcagua LUM/PH-001, 6962m ASL, in the relatively new Argentina (Mendoza) association.
This was activated on 16th February 2019 by Tom Rudzinski SQ9FVE, operating as LU/SQ9FVE. Tom is an experienced and skilled mountaineer, and as required for such an undertaking, planned the expedition carefully including all necessary support.
The climbing to the summit began some 13 days ahead of the activation, and included several camps and acclimatisation strategies.
The actual activation took place at 1747 UTC and comprised five QSOs on 2m FM, all with Argentinian chasers located around 90km away.
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