here is a question for the power freaks among us I had my little beacon on the air at 187.510 at a dist of 25 miles USG measured it at a -60 EUD at 254 ( york Airport ) was a -13.8 this was done using ARGO they are a 25 watt beacon but I believe that is their input and not ERP any ideas on the average antenna efficiency on the typical NDB I suspect I may have been radiating perhaps a few Micro watts ?? Bob