the Part 15 rules

This is a selection of some of the FCC Part 15 rules from Title 47 of the Code of Federal Regulations. To read the complete set of rules in their latest versions, you should visit www.access.gpo.gov

15.15 General technical requirements.

15.23 Home-built devices.
governs homebrew transmitters

15.203 Antenna requirement.
antenna rules for mass-produced transmitters

15.204 External radio frequency power amplifiers and antenna modifications.
more rules for mass-produced transmitters

15.205 Restricted bands of operation.
be careful not to radiate in these frequency bands!

15.209 Radiated emission limits; general requirements.
general rules for the whole RF spectrum

15.211 Tunnel radio systems.

15.215 Additional provisions to the general radiated emission limitations.
important! explains that 15.217 through 15.255 are exceptions to 15.209

15.217 Operation in the band 160-190 kHz.
governs the 1750 meter band a.k.a. LowFER band

15.219 Operation in the band 510-1705 kHz.
using an antenna in the AM broadcast band

15.221 Operation in the band 525-1705 kHz.
part (a) governs carrier current and leaky coaxial systems anywhere;
part (b) governs any type of radiation on an educational campus

15.223 Operation in the band 1.705-10 MHz.
allows very weak unlicensed activity in the shortwave bands

15.225 Operation within the band 13.553-13.567 MHz.
a little more shortwave access

15.227 Operation within the band 26.96-27.28 MHz.
(this band is also used by CB radio and some remote control vehicles)