Thread: Directed HD Radio Causing static in factory radio

Hi,

I currently have my directed hd radio wired up to the +12V output of my carnetix P1900 power supply. It is set to FM modulation for audio output. The +19V output of the carnetix is tied to the input for my laptop. When the HD radio is not powered on, I have good reception when the Directed HD radio is disconnected from the carnetix. When the radio is connected and turned on, there is static and distortion on the stereo radio. I tried tying the hd radio return directly to the chassis of the car. I also tried soldering the RCA returns to chassis but it did not improve the static. Does anyone else have this problem and have any idea how I can fix this? Thanks!