Will 8 gauge automotive wire soldered to the regular 12 gauge power cord hurt the radio? Shawn February 26, 2019 18:37 Updated No, it won't hurt the radio. This can help reduce the amount of voltage drop when you transmit. Related articles How do I calibrate the SWR meter on my radio? Why does the radio's meter show less power output than my external watt meter? Common factors that cause high SWR readings No USB Cable came with my SR-655HPC. Hooking up radio to directly to the Battery Comments 0 comments Article is closed for comments.