Ready - If you were referring to FCC certifications for Amateur Radio units, those are relatively light - mostly basic stuff like keeping emissions within Amateur Radio spectrum and within the allocated bandwidths, and maximum power levels. And, of course, the "big one" - cannot transmit in 27 MHz (nor easily modified to do so) which was reallocated to the Citizens Band Radio Service. https://www.fcc.gov/wireless/bureau-divisions/mobility-division/amateur-radio-service says "The FCC equipment authorization program does not generally apply to amateur station transmitters."
If you are referring to certifications for Part 15 units (license-exempt bands such as most of 2.4 GHz), well, I lived through the popularization of that in the days prior to Wi-Fi, where the light regulations were flagrantly ignored. I knew of Wireless Internet Service Providers who prided themselves on bypassing the (required) integral antennas to attach directional antennas, and even amplifiers.
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Ready - If you were referring to FCC certifications for Amateur Radio units, those are relatively light - mostly basic stuff like keeping emissions within Amateur Radio spectrum and within the allocated bandwidths, and maximum power levels. And, of course, the "big one" - cannot transmit in 27 MHz (nor easily modified to do so) which was reallocated to the Citizens Band Radio Service. https://www.fcc.gov/wireless/bureau-divisions/mobility-division/amateur-radio-service says "The FCC equipment authorization program does not generally apply to amateur station transmitters."
If you are referring to certifications for Part 15 units (license-exempt bands such as most of 2.4 GHz), well, I lived through the popularization of that in the days prior to Wi-Fi, where the light regulations were flagrantly ignored. I knew of Wireless Internet Service Providers who prided themselves on bypassing the (required) integral antennas to attach directional antennas, and even amplifiers.