The BA1404 chip is the heart of many low-power FM stereo broadcast band radio transmitter projects, including the hugely popular Ramsey FM-10 kit. You can find these chips in devices ranging from short-range FM modulators for car radios, to "pirate radio" transmitters with dozens of miles of range. The BA1404 has the benefit of a wealth of information available online, including plans to help you create a completely legal, low-cost FM stereo transmitter.