When I Transmit my the display shows my Voltage Drops Shawn June 30, 2016 21:40 Updated A voltage drop during transmit is normal on the SR-655HPC, SR-955HPC & SR-89MC. Related articles Is the swr meter on the radio accurate enough to set antennas or should I get a meter? My receive dropped off, and I can only hear radios that are close to me. Why can't I hear my Roger Beep through my Talkback? Does the variable power just set the dead key or adjust the power itself? How do I calibrate the SWR meter on my radio? Comments 0 comments Article is closed for comments.