Total posts : 45366
Gerry wrote: “The arrangement I have now is a 10ft 1.5″ dia. pole that is hinged at the bottom. I can swing it down, work on the transmitter and then swing it back up again. This is on my kids old swing set – imagine if it was on the chimney :). The range at the moment is 1 -2 miles using a single 5ft ground rod.”
The description of your prototype transmitter reads well, especially the part about reducing the effort of getting a good impedance match between the transmitter and the 3-m, base-loaded radiator connected to it.
If you were to proceed with testing for FCC certification for your design, would you expect it to meet the applicable Rules in the installation configuration you outlined in the quote above?
Unless effective means were included in your transmitter design to electrically isolate the transmitter at radio frequencies from its mount, and from all DC, “ground” and program input wires connected to it, wouldn’t the physics of this situation mean that the effective radiating length of the antenna system exceeds the 3 meters permitted by 15.219? Paper 3 at the link below goes into more detail about that.
Just wondering what your viewpoint might be on this.