Also worth noting, even though I took precautions with the 2m like running power straight to the battery on a heavy twisted pair, and routed the coax away from everything else where possible, I have to turn the stereo off before transmitting. I get a loud buzz when I key up, no matter what volume setting on the crap aftermarket stereo. Doesn't matter what input the stereo is set to either. I never got around to troubleshooting it. You may need to experiment with routing, buy extra wire.