mtr3b mtr5b battery alarm Search for: Home › Forums › Topic Tag: mtr3b mtr5b battery alarm Viewing topic 1 (of 1 total) Topic Voices Posts Last Post MTR3b (and 5b) – how does the battery voltage alarm work? Started by: SQ6GIT in: QRP Transceivers 2 3 5 years, 10 months ago SQ6GIT Viewing topic 1 (of 1 total)