KP4AO Arecibo Observatory 50 2016-06-21 20:18:20 Sunday, November 10, 2013 KP4AO active on 20 meter in celebration Arecibo Observatory 50 Anniversary. Views7806 Comments0 More...
KP4AO Arecibo Observatory 2019-09-30 18:30:20 KP4AO - 50 ANNIVERSARY for the Arecibo Observatory in Puerto Rico Date: November 10, 2013 9am - 3pm in 20 meter. Views9704 Comments0 More...