CB Radio operators normally transmit double sideband AM on the first 23 channels. On channels above Channel 23, upper sideband or lower sideband equipment may be used. Four watts of carrier power is allowed for output on AM, and 12 watts of peak envelope power is the maximum power output on SSB. You may only use a type-accepted CB Radio transmitter. Any internal modification to a type-accepted CB Radio transmitter cancels the type acceptance, and use of such a transmitter voids your authority to operate the station. The same type regulation applies to power amplifiers. Power amplifiers are specifically disallowed for use with a CB Radio.