Bart pickup installation question

[tjclem]

I am working on a narrow 5 string 17mm string to string. Will Bart 57CBJD pickups work I have used them before for wide spacing with no problems. Are they bar magnets or pole? Anybody tried this before? I am contacting bart but who knows how long they will take to get back to me....t

 

[FBB Custom]

Pretty sure they are bar magnets. The web site has a PDF with pictures of the coil structures and covered spacings for most models.

 

[tjclem]

I got this from best bass gear. Good people.

"Hi Tom,

The Barts are bar magnets. Minimum spacing over the pickups is 64mm for those. Be sure to check your total spacing over the pickups themselves."

If they are bars. Why would there be a minium spacing?

 

[Son of Magni]

Yeah, Brian (BBG) is the first person I would have asked.

Also take a look here:
Invalid Link Removed

I'm not sure what the min spacing means. But they are blade style pickups.

 

[erikbojerik]

If they are bars. Why would there be a minium spacing?

You don't want the outer strings to be too close to the ends of the bars, you'll lose output from those strings.

You really want them to be comfortably inside the "aperture" of the magnetic field created by the bars, where the magnetic field lines are mostly flat. The field lines start to curve toward the ends of the bars, and a string located there will not produce as much current in the pickup coil.

 

[tjclem]

That would be a maximum spacing problem

I wastold by best bass gear that there are 2 bars in the pickup and if the spacing is to small the "D" string will be over one of the gaps between bars.......t

 

[Son of Magni]

Yeah, that is correct. The D version is two single coils in-line. If you used the S version then you wouldn't have this issue.