EMI/RFI inline filters?

Wow. This question is full of contradictions. High threshold may not be high gain, depending on what machine you are using. External filters are for 50/60hz filtering and will have no effect at all on your machine's performance.

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The ads on ebay run that the help filter out em and radio interference.... as well as a the claim of running higher gains cleaner. The ads and pics show the coil plugging into the filter.... the filter plugs into the circuit box.

I'm using a Tesoro Cibola......all the science I understand not... sorry if all this sounds confused.

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		Quote:			Posted by Lakemonster
	The ads on ebay run that the help filter out em and radio interference.... as well as a the claim of running higher gains cleaner. The ads and pics show the coil plugging into the filter.... the filter plugs into the circuit box. I'm using a Tesoro Cibola......all the science I understand not... sorry if all this sounds confused.

Go ahead and buy one. Figure it out for yourself. You clearly didn't come here for advice. You only want someone else here to say it will find a chest full of gold for you.

They do filter noise but not the kind you are concerned with. If you have hunted under high tension power lines, you would have heard a constant buzzing at 50hz or 60hz depending on where you live. These would filter that noise out.

Like I said, don't believe me. Go buy one and let us know if it works as you think it might.

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		Quote:			Posted by Lakemonster
	Ouch. I was looking for advice. Sound advice from those who do understand metal detector electronics. I don't.... but I am trying to learn. They aren't expensive.... I suppose I could get one and let you know what I thought of it. But if I had a self misguided appraisal of it and reported back that I thought it worked.... well then someone who does know the facts that proved otherwise would only point out that I indeed have no idea what Im talking about and I would be guilty of promoting something in ignorance. Im sorry I asked now...

Look, mate, you came here, asked advice and then ignored it. You even got a second opinion that gave the same advice. Then you came back and told us that the ads indicated we were wrong. That's fine.

My advice to you has changed. Go buy one. Find out for yourself. Don't bother asking again if you aren't going to pay attention. If you are really wanting an answer, come back any time and ask a question.

By the way, those in line filters were designed for data cables. Go to a thrift store and buy a data cable that has one (Usually a USB cable) and carefully remove it from the cable. Test it on your machine that way. Don't spend money on eBay and pay shipping when you can get the cable for a dollar or so.

Now stop whining and ask your questions. Just don't come here expecting everyone to gush over your question and answer it in a way that suits you rather than giving you the correct answer. If you are going to do the former, at least tell us what you want us to say so we can just say nothing. Sound fair to you?

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But that wasn't the question. He wanted to know what the effect would be and would they work. He got the answer but I believe he really wanted to buy some and wanted reassurances which couldn't be given.

We get a lot of questions like this one where the person asking it wants to be reassured rather than actually get an answer that doesn't agree with the picture he or she has in her mind about something. Some people accept the answer like the recent one we had about using one manufacturer's stock coil on another manufacturer's machine. The answer? It's possible but there are other factors beyond appearance and size. The person got the answer he or she needed and chose to just not take the chance with two machines which were both under warranty.

Posted on: March 21, 2011, 03:43:25 AM

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By the way, Gambol, I know it was you asking about the coil. I'm just having a bit of a grin here. I'm allowed because I'm old.

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