We need steel welds that will maintain (or strengthen) the level of VLF radio shielding provided by mild steel. My calculation is that the production-grade steel I’ve sourced out at 50/1000 of an inch, will provide at least 10 skin depths for a 10 kHz wave. This will massively reduce the signal strength. My suspicion is that if VLF radio is found to be the cause, then the culprit frequencies might be in the range of 8-16 kHz.
So what exactly do we need to know before we start welding this stuff? Can anybody find a reliable source for information on this topic? I’ve searched for hours and all I can find are references to my own blog or irrelevant topics.
Perhaps we need a radio engineer to weigh in, as well as an expert welder.