redcab

I've hooked an iPOD to the AUX input of the CDR-220 head unit. Works fine.

I bought the iPOD car charger (made by Belkin) and during quiet passages there is a hum (only there when the charger is connected). I can minimize it by turning the iPOD volume out to max, allowing the CDR-220 to be a lower level (typically volume ranges from +15 to +25 depending on my mood).

I assume that this is caused by alternator noise induced into electrical system.

Does anyone know anyway to filter it out? Anyone else have this problem?


Thanks!

mattmarsden

Probably an earth loop...

Ed996

I have this same problem - have taken to bypassing the belkin unit until I find a solution. Any ideas greatly appreciated.

eternal

Only thing I can think of is a line conditioner, but I don't know if they make one small enough for this application

Waz996

i had this same hum from my newly installed amp, two filters on the input solved the problem completely..

waz

Ed996

Radio shack sells a ground loop isolator for less than $20. I just installed it and it seems to work. We'll see if it does tomorrow. Ed

redcab

I saw the link in the other thread to the Radio Shack ground loop isolator. Thanks.
Is there a product that filters the power side, rather than the signal side. Intuitively, it seems better to filter the noise before it gets into the music.
Thoughts?

Ed996

I think so. Radio shack had a larger unit that had power-lead looking wires on it for CBs, Ham Radio etc. It was also about $20. Same section.

Ed996

Still getting the hum sometimes with the isolator - will probably try the power-side filter.