Noise from radio with Nokia Car Kit

[fdeville]

I have a 2001 996 C4 with factory installed CDR22 (and Porsche amp in the front trunk) and an afterwards installed Nokia Carkit CARK-91 connected to the radio. When the phone is in use, the radio mutes and sound comes through one of the speakers, as it should.

But the problem is that I hear a whining, annoying sound through the speaker when I drive. Higher RPM's, higher whinging sound. For me it is still not much of a but problem, but the person I'm talking to through the phone has lots of trouble understanding me as he also hears this same whining sound.

I did some searches on the forum but without any solution. I read somewhere that maybe a noise suppression filter should be installed, but I don't know where (what wires) I should connect it to. Can somebody help ?

thanks

Filip

[monkeydust]

I hooked up my iPod to my Becker a few weeks ago and had the same problem. I went to Fry's and bought one of those noise suppression units from the car stereo department (they had several to choose from that were about $20 each). It's typically a black box with a red, black, and possibly one other wire coming out of it. I connected the red and black wires from my iPod cable power to the noise suppression box and then connected the red and black wires on the box to the power and ground wires going into my radio. Completely solved my problem.

They are also known as a "Ground Loop Isolator". A lot of them have RCA plugs on them which was not what I needed. But, Fry's had one with just the ground and power wires that did the trick for me.

This one looks somewhat similar to the one I bought.

Edited December 29, 2007 by monkeydust