It is true that you can damage the radio board if you use your GR3 (or any Topcon GNSS receiver) without an antenna attached. In this case, I only had the GR3 powered on for the duration of the video and didn't bother to attach the antenna. Definitely not a "best practice" on my part.
It is true that you can damage the radio board if you use your GR3 (or any Topcon GNSS receiver) without an antenna attached. In this case, I only had the GR3 powered on for the duration of the video and didn't bother to attach the antenna. Definitely not a "best practice" on my part.
I've been advised not to turn on my GR-3 without an antenna attached. Has this caused you issue?