Is there such a thing as a battery for a radio that size?
Our house here is on a corner. So there are power lines both along both the front and along the lengthy side. The daytime noise is both ridiculous and interminable on any radio here using wall current.
I got the re-fitted 180 — through the courtesy of a poster to this forum — just as much for daytime DX as for nighttime DX. All the other radios in the house work are very well-behaved on DC. Far less 2017 noise affects them.
Was there ever a battery designed for use vis-a-vis these big rigs, like the SP-600’s? Those beasts used to stay in outdoor shacks year ’round.
Probably not, but you might try a line isolation transformer– that will often reduce line-conducted noise quite significantly. Ground the case to a good earth ground. They generally aren’t too expensive. Check the power rating before buying.