I've installed a very inexpensive home DVD player in my car (to be able to reliably read DVD R/W disks that I create). It's a regular home theater DVD player, runs on 110V, powered off a converter that creates 110V from the 12V car power source.

I have two monitors in the car that are fed by the DVD player. The picture is very clear on one - but the other shows lots of snow and interference. I've isolated the problem to the DVD player - when it is plugged into the 110V converter the noise is created, when it is unplugged the noise stops. (The converter itself generates no noise).

Does anyone know what sort of filter I can put on the DVD player to eliminate the noise? Or is there some other solution? Or - can you recommend a different message forum where I might look? I'm having trouble finding online references to powerline noise (everything I can find referes to X10 stuff...)

Thanks.

drive a 14"marling spike right through that sucker and into the chassis.

How do you figure that the 12 to 110 doesn't make any noise? Believe it or not, it does. Alot of noise. The one's that I've used in the past made soooo much noise my apc wouldn't even switch over from it's own battery to the converter.

If you have a cheap radio, which most of us does. Then plug that into the converter and listen for the noise.

Im not sure if that can be cleaned up too much though if at all.

Rob

I agree with you - I assume the converter is making lots of noise. But for whatever reason, it is not causing any distortion on the monitor - and that's the only noise I care about (maybe the noise is in a different frequency range).

I don't have a scope to see where it is - are there inexpensive "generic" filters I can try? (Tried an X10 filter - it created more distortion, believe it or not).

Well the noise is the 60 hz hum that the conveter that it makes to make the 60hz for the 110v.

I dont know of any filters that can help with that. However I am going to a car radio installer place today to work there. First day on the job. If I remember I'll ask them what is the best filter. Of course this filter has to after the 12 to 110 converter.

Here's a question for you. You said that you have two monitors. But only one has the noise. Are both monitors the same brand and model?

Are they in ANY way connected different? If possible can you hook up the ground of both monitors to the exact same place. Use the same bolt and stuff. How about the power supply for them, can you do the same for those?

Even if you hook them up just as a test to see if that would help any.

Rob

hypnotherapy is the only answer .get a local guy to treat the whole family into believing there is no hum.works a treat i use a local guy to treat all my customers into thinking they have a full boothroyd stuart meridian home cinema when they really have a mono video and a aiwa mini system

WHAT??!!

What happened to Foxwoods?

I think the problem is the ground loop (which is what you were suggesting). I'm going to try changing the locations of the grounds, but I'm not particularly adept at auto installations and I don't want to tear up my car. I'm also going to try a ground loop isolator from Radio Shack.

Thanks very much for the input.

you're welcome, if you can't find a 14" spike, i should think a 10" or a 12" would suffice, but an 18" would probably be overkill.

Im still at foxwoods, but only for 3 months. So that the insurance would pay for the transplant.

I concur entirely, though I would suggest copper as the most effective medium. Of course if one wishes to be consider a poseur titanium could be a consideration - with the mega-bucks version being platinum.

actually gold is much more effective, but it is a bit too malleable, so you will probably need something to reinforce it.

mercury is the best conductor but is poisionous .and djy gypsy rose lee is the best medium not copper

This message was edited by bob griffiths on 08/05/03 13:47.

i miss, miss cleo..........//sad

cleo?


also hard to build a spike out of mercury