Total posts : 45366
I had never read this 219 rule: ” This regulation does not dictate a field strength limit but specifies that the combined length of the antenna and ground lead cannot exceed 3 meters “
I mean it looks like a strange rule, the FCC 15 does not tell anything about the max height the transmitter can be placed nut this 219 is a tricky one, someone lives on the 150th floor of a skyscratcher, at his/her balcony ( one that is surrounding the complete floor ) he/she places a legal FCC 15 part AM transmitter, a 3 metre antenna and the grounding on the metal of the balcony ballustrade metal. The grounding in this case is much more as the regulated 3 metres nut it is not possible to ground it at another manner.
Same is if someone uses the LPAM transitter indoors, than is the most used grounding, the central heating system, that has also a lot of more metres of metal….
If used outside, than a grounding of at least 10 metres is needed to protect the aquipment also against lightning. In all 3 the above examples the transmitter is suddenly illegal..
Call me a donkey but is the FCC really going to control the depth of the grounding or giving a fine if the grounding is connected to the central heating or metal balcony ballustrade?