About

Posted on January 1, 2026 · 1 min read

I’m Patrik, callsign DO9PSE, broadcasting from Koblenz at the confluence of the Rhine and Moselle. Licensed since 2004 and still tinkering: by day I write software, by evening I’m chasing propagation on twenty metres or winding a common-mode choke at the kitchen table.

This site is a logbook of activations — POTA, SOTA, COTA — the gear that makes them happen, and the dispatches written between them.

The station

HQ is a fixed shack with a solid ground rod and a patient kettle. Most of the interesting work happens out in the field: on a hilltop with a squid pole, at a park bench with a wire in a tree, or beside a loaded bike on a riverside path.

This station runs on curiosity and 5 watts of QRP.

73 de DO9PSE