Total posts : 45366
[quote:5349d773f8=”Ultanium”]Two copper “rings” that are each 48″ tall, and the phasing coil of about 2″ tall, all wrapped on an 8″ diameter pipe still falls below the 3m limit of the rules. Not needing a ground system…[/quote:5349d773f8]
Is your Part 15 tx installed at/near the antenna input? If so, do you have any shielded cables connecting the tx to the power supply and program source on the ground? Then if so, those cable shields are carrying RF current, and can be a (large) contributor to the RF fields that this system can generate.
And if the tx is at ground level and feeds the EH antenna input connector through a cable (coax or otherwise), that cable will radiate.
Ted Hart has stated his concerns/explanations about feedline and cable radiation from EH antennas, which can be a problem — when the power is greater than 100 mW, anyway.