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April 26, 2018 at 8:30 am #3701
Thank you for the suggestion. Actually, that what I am doing right now, but it is a little awkward to adjust the volume control every time switching receiving radio signal to side tone. By the way, R26 in the schematic seems control the level of side tone, and I am wondering to try to replce the fixed value registance to a variable registance so that the two volumes are matched. I wonder if some body has already tried this.