Ranko Boca 4O3A is a force in global contesting and amateur radio innovation. From his breathtaking hilltop QTH in Montenegro—accessible only by rugged vehicles or his personal helicopter—Ranko has redefined what it means to build a world-class station. A telecom engineer by training and a contester since the 1970s, his early days were shaped by club stations and soldering irons. Today, he leads SkySat and the 4O3A product line, home to cutting-edge hardware like the Power Genius XL and Station Genius—gear that’s reshaped high-performance amateur radio. After a stint in broadcast engineering and a war-disrupted career that took him to Hungary, Ranko returned to Montenegro with a singular vision: build not just a top-tier contest station, but a company that delivers "broadcast-grade" equipment to hams worldwide. His station, nearly destroyed by wildfire in 2017, is now being rebuilt—bigger, tougher, and smarter than before. He calls it “living in a big radio club,” and he means it literally: 4O3A’s R&D is as much about passion as it is about profit. In contesting, Ranko doesn’t shy from strong opinions. He’s called for bold changes in the CQ World Wide rules: shorter operating times for health and fairness, equal QSO points to level the geographical playing field, and a new "Single-Op Two Band" category to democratize high-level competition. And while he refuses to name a definitive “third best” contester in the world, his praise for legends like N5TJ and K1TO—and for regional masters like YT6W and YT7AW—shows he’s thinking globally, but never forgets home. Join the conversation and subscribe to Q5 Worldwide Ham Radio.
Thanks for letting me operate from your excellent station Ranko. Stacked Yagis on a mountaintop makes DXing too easy. Montenegro is one of the jewels of Europe & a fantastic place to contest/DX from..............Ranko's hospitality was #1. Tom KHO/KCOW
Ranko produces state of the art fully integrated station equipment. His 403a line has been a pleasure to use.
