Hello everyone, I bought a used ic910h and am having a problem with it so thought I would ask if anyone else had the same problem. When transmitting on FM or SSB the audio sounds very good but there is a hum sound in the back ground. I have been told it sounds almost like a 60hz hum. The audio is great but the noise/hum sound is always in the back ground. It has the DSP in the two meter side but the noise the there if the DSP is on or off. I have tried two different power supplies with the same result. I went through the menu settings and cant get rid of this noise. Any one have an idea? Thanks in advance for your help. 73 and God Bless, John KB9RYI