Trevor, there is no power level below which an intentional radiator in the amateur radio bands becomes "unregulated". It is still an amateur radio station, and must be operated in accordance with the relavent regulations, including emissions purity, proper IDing. (and control of operations) etc. QRP and QRPp enthusiasts regularly run at these low power levels. It is the hallmark of a diligent operator to insure all of his or her "stations" are compliant and under the proper control.
73
Bruce N1RX
Trevor wrote:
We are talking power levels of 50 to 100milliwatts. With an eirp of even less.
What is the power level in the US where devices become unregulated.
73s HNY
Trevor
VK3PD
Bruce Beford N1RX