Radio interference when rev motor with ipod

Running from 12v not batteries - I will try battery power and see if it makes any difference. Would be a shame if this were the case as I try not to have things that require too many batteries.
Thanks

Yep should be no impediments to signal.

Am trying different frequencies - so far no real change.

Thanks

Alan

Has a tape drive - so I guess I could get a different connection.

I read a previous post about someone hooking their ipod up to their stereo via the CD changer option - hard-wired. Like this idea and someone said can get wiring via West Coast Hifi - will look into this alternative.

Thanks

Eric

Connecting direct - like to sound of that - I would love to say I know how to do that.....but alass.....not.

Hey but I am not proud - How do I do this?

Thanks

Alan, I do not think its possible to do what Eric suggests. The 4 frequency Belkin FM gadget I have has its antenna within the short (15cm) wire that goes to the headphone socket. I doubt that any of the other ipod FM transmitters have an accessible antenna connection.

What I do on my boat is to run the ipod from the belkin/ ipod cig socket accessory. This has a headphone skt where I plug in the FM transmitter.
I had some interference but velcroing the FM transmitter in a certain place fixed it. Of course, I had some choice where to place the cig lighter skt as well.
In my troopie I feed the Ipod headphone output straight into the CD input of the cassette only stereo. Perfect sound. I did try first the FM transmitter option but had problems like you, maybe fitting another cig socket elsewhere and with ferrite suppressors might have cured it.

Another thing to consider, if the FM transmitter uses AAA batteries (mine does) is their life span. I'm convinced the gadget runs these batteries down reasonably fast and a low battery is equal to a weak FM signal.
I fixed that one with a small regulator set to 3V output @ 12V input, no more battery problems. Connection was simply via dummy ( dowels & thumb tack) "batteries".
Klaus

Hi Klaus

My setup sounds similar to what you mention -. Runs off 12 v -The FM trsnsmitter I use is digital and can use a wide range of settings..

Alan.
To test the theory place the ipod close to the antenna, if the noise stops you can go ahead and improve the connection. If the noise does not stop then you will have to place a filter in your supply to the ipod. to make a direct connection to the radio you can remove the radio and plug in to the antenna plug a cable with a switch to connect to the ipod or the original antenna, if there is no antenna terminal on the ipod all you have to do is tape a wire close to the built in one. Eric.

Thanks Mike, good advice, I wasn't aware of that. I was thinking of getting a better FM gadget at some stage for my boat, preferably one that is also powered from the Ipod to reduce the wiring complexity.
Klaus

Yep - high pitching sound - goes up up with the revs. I will try moving it around a bit first and make sure I have everything set ok. If not, I will do as you suggest. It's a bit of a needle in a haystack if you don't know what to look for.Thanks alot for the advice Blackcat.

ok, this combined with "Running from 12v not batteries " makes it clear that the AC from the Alternator on the 12 volts is causing the problem - an Alternator puts out rectified AC - not DC.

What you need is something that can filter out audio frequencies in the 12 volt feed to the Ipod - if it had been designed to work off a car supply you wouldn't have this problem. If you go to an Auto electrician describe it as Alternator Whine.

A 0.1 capacitor will only with radio frequency interference getting into the radio aerial.

I don't know of one that has Cigarette Lighter Plug and socket ready made. You could wire this one into the Cig Lighter socket for loads up to 5 amps - just don't use the Cig Lighter on it (it draws 10 amps)
www.jaycar.com.au/productView.asp?ID=AA3072

Mike