Trying to figure out this new to me old cruddy Galaxy dx44v. The radio transmits and receives fine. The problem that I am having is more of an annoyance. When i turn the squelch down I hear a audible humming sound through the speaker. The sound goes almost away when I lay the microphone down, but when I put my hand close to the mic it starts to come back. If I touch the screen on the front of the mic it gets the loudest. I can touch the mic and then touch the chassis of the radio or the mic jack and it goes away. Other mics do the same so it must be the radio. Any ideas? Thanks for the help in advance.