This site is dedicated to the operation and history of amateur radio station PJ4VHF / N7BHC. Most of the data pertains to VHF DX operation,  propagation, and beacons The focus is on tropospheric ducting.

I was first licensed as ZS2BI in South Africa in the late 70s. Upon emigrating to the USA in 1978, I was first licensed as KA4DRA. My callsign changed to N7BHC when I moved to Utah. You can read more of my ham radio history on these pages.

In 2008, my focus is on trans-oceanic VHF ducting. A number of research projects and operations are in process to expand the global use of this mode.