A small but nevertheless very powerful FM transmitter. The transmitter circuit consists of three RF stages, and an audio preamplifier. It can be modulated directly from a piezoelectric microphone which comes in the kit or from a preamplifier. It delivers 4 Watts of RF power on the antenna. The antenna can be an open dipole or a GROUND PLANE. Suitable power supply is the SMART KIT 1068. Supply voltage: 12-18 VDC.