This flight took us over Mount St. Helens to test the recently installed 2 meter FM radio (ICOM IC-2300) using the simplex national call frequency (146.520) to determine radio coverage and activity level on the 2 meter amateur radio band. I was astonished at the incredible responses to my call as a "pile-up" quickly formed around the call frequency. It truly was an amazing experience to see the snow covered volcano from 9,000 feet in the air while having radio conversations with my ham radio friends on the ground. NOTE: Some QSOs are truncated due to audio editing. However, each QSO contains enough audio to clearly identify the calling station.