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Re: Wierd Magnetic Fields?
"Joe LaVigne" <jlavigne@hits-buffalo.com> wrote in message
news:12le1y3j8bq3$.dlg@hits-buffalo.com... > OK... This isn't really a "problem" with the car, but it has me > baffled... > > I have an 06 Civic Si. It is a great car, but it didn't come with a > compass, which I have always found invaluable, being that I do a lot of > on-site work all over Western NY and Northwestern PA. > > So, I bought a little ball compass that can be stuck to the dash, > suctioned > to the windshield or clipped to the visor. Simple solution. > > The problem is that no matter which way I go, I am always pointed ENE > according to the compass, when it is anywhere inside the front section of > the car. I haven't checked it in the back, as I don't ever plan to drive > from there... ;-) > > Before you ask, no there is nothing wrong with the compass. If I take it > out of the car and walk around, it works fine. > > So, my question is simply if anyone knows what in the car could be causing > this. There must be something with a strong enough field that it is > pulling the compass, but I can't seem to narrow it down. I get the same > results with the compass in the passenger seat area or the drivers area, > on > top of the dash or below, and even at the roofline. > > I don't expect to be able to fix it. The only solution may be to buy the > stupid $200 option rearview mirror with a built-in digital compass, but > I'd > still love to know what on earth is going on... > > -- > Joseph M. LaVigne My guess is that the car body is magnetized. I used to work in aviation and would periodically see the problem in fabric covered planes that had steel tubing frames. We would try to compensate the compass and we wouldn't even get in the ballpark. (If the problem is electrical, you will see the compass jump when you turn things on and off.) It is theoretically possible to degauss the car body - it's the practical part that gets in the way. The essense is to wrap the body with wire (the way you are probably already thinking, from the side over the top and down and around). The wire is connected to AC power - you'd want a few amps flowing - that is slowly decreased. I've never done it because it was beyond the authorization of our avionics/instrument shop. Whether you want a compass enough to pursue that is up to you. Mike |
Re: Wierd Magnetic Fields?
It's the radio speaker.
Al |
Re: Wierd Magnetic Fields?
It's the radio speaker.
Al |
Re: Wierd Magnetic Fields?
It's the radio speaker.
Al |
Re: Wierd Magnetic Fields?
On Fri, 8 Sep 2006 08:13:30 -0500, R Flowers wrote:
> "Joe LaVigne" <jlavigne@hits-buffalo.com> wrote in message > news:12le1y3j8bq3$.dlg@hits-buffalo.com... >> So, I bought a little ball compass that can be stuck to the dash, >> suctioned >> to the windshield or clipped to the visor. Simple solution. >> >> The problem is that no matter which way I go, I am always pointed ENE >> according to the compass, when it is anywhere inside the front section of >> the car. I haven't checked it in the back, as I don't ever plan to drive >> from there... ;-) >> > > When you move it around to various locations in front, does the direction > deflect slightly? If there were something inside the car that created a > magnetic field - under the dash or hood, etc. - it seems to me that the > lines of magnetic force would not all be lined up. In other words, in an > area that small, there should be a 'point' of origin somewhere. You could > even approximate the location by observing the compass deflection. You'd think, wouldn't you? ;-) I do not find any serious movement from location to location. It always shows ENE. > > Unless the car is somehow acting as a coil, and the compass is 'inside' the > coil. > >> Before you ask, no there is nothing wrong with the compass. If I take it >> out of the car and walk around, it works fine. >> > > What about close to the car? Is there a clear line of working/not working as > you leave the car, or does the effect 'fade out?' As soon as I get out of the car with it (even holding it out the window) it acts normally. Strangest friggin thing I have ever seen... -- Joseph M. LaVigne jlavigne@hits-buffalo.com http://www.thelavignefamily.us/MyPipePages/ - 9/9/2006 3:41:52 AM Tobacconist Brick and Mortar Database: http://bam.tobaccocellar.org/ "Voting Democrat or Republican is like voting for which vehicle will carry you to hell the slowest." - Harry Browne, Former Libertarian Presidential Candidate |
Re: Wierd Magnetic Fields?
On Fri, 8 Sep 2006 08:13:30 -0500, R Flowers wrote:
> "Joe LaVigne" <jlavigne@hits-buffalo.com> wrote in message > news:12le1y3j8bq3$.dlg@hits-buffalo.com... >> So, I bought a little ball compass that can be stuck to the dash, >> suctioned >> to the windshield or clipped to the visor. Simple solution. >> >> The problem is that no matter which way I go, I am always pointed ENE >> according to the compass, when it is anywhere inside the front section of >> the car. I haven't checked it in the back, as I don't ever plan to drive >> from there... ;-) >> > > When you move it around to various locations in front, does the direction > deflect slightly? If there were something inside the car that created a > magnetic field - under the dash or hood, etc. - it seems to me that the > lines of magnetic force would not all be lined up. In other words, in an > area that small, there should be a 'point' of origin somewhere. You could > even approximate the location by observing the compass deflection. You'd think, wouldn't you? ;-) I do not find any serious movement from location to location. It always shows ENE. > > Unless the car is somehow acting as a coil, and the compass is 'inside' the > coil. > >> Before you ask, no there is nothing wrong with the compass. If I take it >> out of the car and walk around, it works fine. >> > > What about close to the car? Is there a clear line of working/not working as > you leave the car, or does the effect 'fade out?' As soon as I get out of the car with it (even holding it out the window) it acts normally. Strangest friggin thing I have ever seen... -- Joseph M. LaVigne jlavigne@hits-buffalo.com http://www.thelavignefamily.us/MyPipePages/ - 9/9/2006 3:41:52 AM Tobacconist Brick and Mortar Database: http://bam.tobaccocellar.org/ "Voting Democrat or Republican is like voting for which vehicle will carry you to hell the slowest." - Harry Browne, Former Libertarian Presidential Candidate |
Re: Wierd Magnetic Fields?
On Fri, 8 Sep 2006 08:13:30 -0500, R Flowers wrote:
> "Joe LaVigne" <jlavigne@hits-buffalo.com> wrote in message > news:12le1y3j8bq3$.dlg@hits-buffalo.com... >> So, I bought a little ball compass that can be stuck to the dash, >> suctioned >> to the windshield or clipped to the visor. Simple solution. >> >> The problem is that no matter which way I go, I am always pointed ENE >> according to the compass, when it is anywhere inside the front section of >> the car. I haven't checked it in the back, as I don't ever plan to drive >> from there... ;-) >> > > When you move it around to various locations in front, does the direction > deflect slightly? If there were something inside the car that created a > magnetic field - under the dash or hood, etc. - it seems to me that the > lines of magnetic force would not all be lined up. In other words, in an > area that small, there should be a 'point' of origin somewhere. You could > even approximate the location by observing the compass deflection. You'd think, wouldn't you? ;-) I do not find any serious movement from location to location. It always shows ENE. > > Unless the car is somehow acting as a coil, and the compass is 'inside' the > coil. > >> Before you ask, no there is nothing wrong with the compass. If I take it >> out of the car and walk around, it works fine. >> > > What about close to the car? Is there a clear line of working/not working as > you leave the car, or does the effect 'fade out?' As soon as I get out of the car with it (even holding it out the window) it acts normally. Strangest friggin thing I have ever seen... -- Joseph M. LaVigne jlavigne@hits-buffalo.com http://www.thelavignefamily.us/MyPipePages/ - 9/9/2006 3:41:52 AM Tobacconist Brick and Mortar Database: http://bam.tobaccocellar.org/ "Voting Democrat or Republican is like voting for which vehicle will carry you to hell the slowest." - Harry Browne, Former Libertarian Presidential Candidate |
Re: Wierd Magnetic Fields?
On Fri, 08 Sep 2006 06:17:57 -0700, jim beam wrote:
> Joe LaVigne wrote: >> OK... This isn't really a "problem" with the car, but it has me >> baffled... >> >> I have an 06 Civic Si. It is a great car, but it didn't come with a >> compass, which I have always found invaluable, being that I do a lot of >> on-site work all over Western NY and Northwestern PA. >> >> So, I bought a little ball compass that can be stuck to the dash, suctioned >> to the windshield or clipped to the visor. Simple solution. >> >> The problem is that no matter which way I go, I am always pointed ENE >> according to the compass, when it is anywhere inside the front section of >> the car. I haven't checked it in the back, as I don't ever plan to drive >> from there... ;-) >> >> Before you ask, no there is nothing wrong with the compass. If I take it >> out of the car and walk around, it works fine. >> >> So, my question is simply if anyone knows what in the car could be causing >> this. There must be something with a strong enough field that it is >> pulling the compass, but I can't seem to narrow it down. I get the same >> results with the compass in the passenger seat area or the drivers area, on >> top of the dash or below, and even at the roofline. >> >> I don't expect to be able to fix it. The only solution may be to buy the >> stupid $200 option rearview mirror with a built-in digital compass, but I'd >> still love to know what on earth is going on... >> > there's two things, the second being most likely: > > 1. the car's full of electrical gear - all of which generates > electromagnetic fields of some degree. you can figure out if that's the > cause by turning everything off and seeing if the needle moves. > > 2. the car's made of ferro-magnetic steel. that always has some degree > of "set" to it. theoretically, it's possible to neutralize this with > big electromagnetic coils running around the perimeter of the vehicle > [as used in shipping], but reality of course is that it's not practical. That certainly sounds most likely to me, too. The effect is the same with the car on or off... Thanks for the possibility... -- Joseph M. LaVigne jlavigne@hits-buffalo.com http://www.thelavignefamily.us/MyPipePages/ - 9/9/2006 3:43:47 AM Tobacconist Brick and Mortar Database: http://bam.tobaccocellar.org/ "If you can't sent money, send tobacco." -George Washington to the Continental Congress, 1776 |
Re: Wierd Magnetic Fields?
On Fri, 08 Sep 2006 06:17:57 -0700, jim beam wrote:
> Joe LaVigne wrote: >> OK... This isn't really a "problem" with the car, but it has me >> baffled... >> >> I have an 06 Civic Si. It is a great car, but it didn't come with a >> compass, which I have always found invaluable, being that I do a lot of >> on-site work all over Western NY and Northwestern PA. >> >> So, I bought a little ball compass that can be stuck to the dash, suctioned >> to the windshield or clipped to the visor. Simple solution. >> >> The problem is that no matter which way I go, I am always pointed ENE >> according to the compass, when it is anywhere inside the front section of >> the car. I haven't checked it in the back, as I don't ever plan to drive >> from there... ;-) >> >> Before you ask, no there is nothing wrong with the compass. If I take it >> out of the car and walk around, it works fine. >> >> So, my question is simply if anyone knows what in the car could be causing >> this. There must be something with a strong enough field that it is >> pulling the compass, but I can't seem to narrow it down. I get the same >> results with the compass in the passenger seat area or the drivers area, on >> top of the dash or below, and even at the roofline. >> >> I don't expect to be able to fix it. The only solution may be to buy the >> stupid $200 option rearview mirror with a built-in digital compass, but I'd >> still love to know what on earth is going on... >> > there's two things, the second being most likely: > > 1. the car's full of electrical gear - all of which generates > electromagnetic fields of some degree. you can figure out if that's the > cause by turning everything off and seeing if the needle moves. > > 2. the car's made of ferro-magnetic steel. that always has some degree > of "set" to it. theoretically, it's possible to neutralize this with > big electromagnetic coils running around the perimeter of the vehicle > [as used in shipping], but reality of course is that it's not practical. That certainly sounds most likely to me, too. The effect is the same with the car on or off... Thanks for the possibility... -- Joseph M. LaVigne jlavigne@hits-buffalo.com http://www.thelavignefamily.us/MyPipePages/ - 9/9/2006 3:43:47 AM Tobacconist Brick and Mortar Database: http://bam.tobaccocellar.org/ "If you can't sent money, send tobacco." -George Washington to the Continental Congress, 1776 |
Re: Wierd Magnetic Fields?
On Fri, 08 Sep 2006 06:17:57 -0700, jim beam wrote:
> Joe LaVigne wrote: >> OK... This isn't really a "problem" with the car, but it has me >> baffled... >> >> I have an 06 Civic Si. It is a great car, but it didn't come with a >> compass, which I have always found invaluable, being that I do a lot of >> on-site work all over Western NY and Northwestern PA. >> >> So, I bought a little ball compass that can be stuck to the dash, suctioned >> to the windshield or clipped to the visor. Simple solution. >> >> The problem is that no matter which way I go, I am always pointed ENE >> according to the compass, when it is anywhere inside the front section of >> the car. I haven't checked it in the back, as I don't ever plan to drive >> from there... ;-) >> >> Before you ask, no there is nothing wrong with the compass. If I take it >> out of the car and walk around, it works fine. >> >> So, my question is simply if anyone knows what in the car could be causing >> this. There must be something with a strong enough field that it is >> pulling the compass, but I can't seem to narrow it down. I get the same >> results with the compass in the passenger seat area or the drivers area, on >> top of the dash or below, and even at the roofline. >> >> I don't expect to be able to fix it. The only solution may be to buy the >> stupid $200 option rearview mirror with a built-in digital compass, but I'd >> still love to know what on earth is going on... >> > there's two things, the second being most likely: > > 1. the car's full of electrical gear - all of which generates > electromagnetic fields of some degree. you can figure out if that's the > cause by turning everything off and seeing if the needle moves. > > 2. the car's made of ferro-magnetic steel. that always has some degree > of "set" to it. theoretically, it's possible to neutralize this with > big electromagnetic coils running around the perimeter of the vehicle > [as used in shipping], but reality of course is that it's not practical. That certainly sounds most likely to me, too. The effect is the same with the car on or off... Thanks for the possibility... -- Joseph M. LaVigne jlavigne@hits-buffalo.com http://www.thelavignefamily.us/MyPipePages/ - 9/9/2006 3:43:47 AM Tobacconist Brick and Mortar Database: http://bam.tobaccocellar.org/ "If you can't sent money, send tobacco." -George Washington to the Continental Congress, 1776 |
Re: Wierd Magnetic Fields?
On Fri, 08 Sep 2006 09:54:29 -0400, RickaTTic wrote:
> No don't spend that kind of money for a compass. Just go to Sears and buy > the yellow digital one with the 2 rubber suction cups. I paid $25 bux and > it is excellent. You do a calibrate by driving in a circle and it > compensates for any magnetic variation in the vehicle. I love the thing. http://www.sears.com/sr/javasr/produ...id=02823009000 http://tinyurl.com/ja56j This one? It isn't yellow, but it looks like what you are describing. I think I'll go get one tomorrow. Thanks! -- Joseph M. LaVigne jlavigne@hits-buffalo.com http://www.thelavignefamily.us/MyPipePages/ - 9/9/2006 3:45:47 AM Tobacconist Brick and Mortar Database: http://bam.tobaccocellar.org/ "Man, the creature who knows he must die, who has dreams larger than his destiny, who is forever working a confidence trick on himself, needs an ally. Mine has been tobacco. " -John Boynton Priestley |
Re: Wierd Magnetic Fields?
On Fri, 08 Sep 2006 09:54:29 -0400, RickaTTic wrote:
> No don't spend that kind of money for a compass. Just go to Sears and buy > the yellow digital one with the 2 rubber suction cups. I paid $25 bux and > it is excellent. You do a calibrate by driving in a circle and it > compensates for any magnetic variation in the vehicle. I love the thing. http://www.sears.com/sr/javasr/produ...id=02823009000 http://tinyurl.com/ja56j This one? It isn't yellow, but it looks like what you are describing. I think I'll go get one tomorrow. Thanks! -- Joseph M. LaVigne jlavigne@hits-buffalo.com http://www.thelavignefamily.us/MyPipePages/ - 9/9/2006 3:45:47 AM Tobacconist Brick and Mortar Database: http://bam.tobaccocellar.org/ "Man, the creature who knows he must die, who has dreams larger than his destiny, who is forever working a confidence trick on himself, needs an ally. Mine has been tobacco. " -John Boynton Priestley |
Re: Wierd Magnetic Fields?
On Fri, 08 Sep 2006 09:54:29 -0400, RickaTTic wrote:
> No don't spend that kind of money for a compass. Just go to Sears and buy > the yellow digital one with the 2 rubber suction cups. I paid $25 bux and > it is excellent. You do a calibrate by driving in a circle and it > compensates for any magnetic variation in the vehicle. I love the thing. http://www.sears.com/sr/javasr/produ...id=02823009000 http://tinyurl.com/ja56j This one? It isn't yellow, but it looks like what you are describing. I think I'll go get one tomorrow. Thanks! -- Joseph M. LaVigne jlavigne@hits-buffalo.com http://www.thelavignefamily.us/MyPipePages/ - 9/9/2006 3:45:47 AM Tobacconist Brick and Mortar Database: http://bam.tobaccocellar.org/ "Man, the creature who knows he must die, who has dreams larger than his destiny, who is forever working a confidence trick on himself, needs an ally. Mine has been tobacco. " -John Boynton Priestley |
Re: Wierd Magnetic Fields?
On 8 Sep 2006 09:49:33 -0700, Zephyr wrote:
> Does it make a difference if the car is on or off? > that could lead you in the direction of what is causing the pull. Nope... -- Joseph M. LaVigne jlavigne@hits-buffalo.com http://www.thelavignefamily.us/MyPipePages/ - 9/9/2006 3:47:13 AM Tobacconist Brick and Mortar Database: http://bam.tobaccocellar.org/ "I believe that pipe smoking contributes to a somewhat calm and objective judgment in all human affairs" -- Albert Einstein |
Re: Wierd Magnetic Fields?
On 8 Sep 2006 09:49:33 -0700, Zephyr wrote:
> Does it make a difference if the car is on or off? > that could lead you in the direction of what is causing the pull. Nope... -- Joseph M. LaVigne jlavigne@hits-buffalo.com http://www.thelavignefamily.us/MyPipePages/ - 9/9/2006 3:47:13 AM Tobacconist Brick and Mortar Database: http://bam.tobaccocellar.org/ "I believe that pipe smoking contributes to a somewhat calm and objective judgment in all human affairs" -- Albert Einstein |
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