I have a small issue that I an trying to resolve. I have a noise on a single frequency that I use. It is 146.820 with a negitive offset. It is one of my radio clubs repeaters. It is very well used by our members. It seams that I am the only one that is having this problem and it's only this frequency. I have 2 radios in my van and they both do it. They are a Yaesu FTM-350 and a TYT TH-9000 VHF. It doesn't matter if they are both on or one of them are off. Couriously when I first start the radios they are silent. The interfearence starts after about 30min of powering them up. The van does not have to be nrunning for it to occure. The radios are direct wired to the battery. Any suggestions would be great.