Flo (DF2ET) @ ::1 on Twitter: "Successfully tested #GM3x0aprs board with #SVXlink in QSO with @DL5BQ. GM340 radio uses CTCSS squelch which is routed to a GPIO of #cm108. #hamradio https://t.co/7lyTSLniNE" /
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German Two-Way Radio Telephones, WWII Tactical and Technical Trends, No. 43, January 27, 1944 (Lone Sentry)
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