Slight whine in radio

I'm getting a little whine I'm assuming from the ignition. Didn't notice it before now and it's probably since I wired direct to the big positive cable in the fuse block. It increases in intensity and pitch as the RPMs go up. It's not loud and barely audible at times but I'd like to make it go away. What's the best way to do that? Some sort of filter in the positive wire for the cb?

 

Come to think of it I hear the directionals and wipers now too. Could it be because I ran the ground to the battery instead of the chassis? I did that the same time I ran the positive to the big battery terminal in the fuse block.
I didn't notice any of this when hooked to the factory hookups but decided it made no sense to have a heavy duty power cable because of the RFX75 and connect them to 16 gauge hookups.

 

I bet it has more to do with the ground running to the battery rather than the chassis now that I think about it. I could hook the positive to the big red cable labeled Acc. instead but wanted to be able turn it on without turning the key on. I can try that too but I'm thinking it's the ground the more I think about it.

 

Yeah I can run the ground wire itself right there in the fuse block without adding the 12 feet I did to get back to the batteries.