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Ham Radio Hobby page of DD1US Matthias
QO-100 Dx Club - Fullduplex operation in FT4/FT8 via QO-100
Homepage DD1US / Sounds from Space
ARRL Letter
Local Amateur Radio Club Operators to Participate in 'Field Day' at Morrow's Meadow — Muncie Journal
ISS radio contact “Cosmic Kiss” with Matthias Maurer via QO-100 – AMSAT-Deutschland
Sandor - DM4DS ♿ (@HAM_DM4DS) / X
DD1US The SWLing Post
Icom IC-735 The SWLing Post
AMSAT-DL Online Symposium September 26
File:Hammer Ace SATCOM Antenna.jpg - Wikipedia