Total posts : 45366
At the risk of thread-jacking, I’m curious to know what the effect would be with the same setup dietnews describes, but mounted on a sheet metal roof? While the ideal may be ground mounting with radials, not every situation will allow ground mounting. Since the relevant section of Part 15 refers to the “ground lead” (FCC’s words) as being part of the overall 3M antenna length, what if a base-loaded antenna as described in this thread were to be mounted on a second story metal roof with a short ground lead attached directly to the roof itself? Inquiring minds, etc.