Results 1 to 9 of 9
Like Tree1Likes
  • 1 Post By kayakerca

Thread: String dampening with .780" X .25" Alnico rods?

  1. #1
    Senior Member Chris Turner's Avatar
    Join Date
    Nov 2009
    Location
    Tucson, AZ
    Posts
    239

    String dampening with .780" X .25" Alnico rods?

    Has anyone else used .780" X .25" Alnico rods in their pickups?

    If so, did you notice any issues with string dampening (you know, when the mags pull too hard on the strings and you get that warbling effect)?

  2. #2
    Senior Member
    Join Date
    Nov 2007
    Location
    Barnegat,NJ
    Posts
    520
    Quote Originally Posted by Chris Turner View Post
    Has anyone else used .780" X .25" Alnico rods in their pickups?

    If so, did you notice any issues with string dampening (you know, when the mags pull too hard on the strings and you get that warbling effect)?
    Chris,

    This effect is more noticeable on the neck pickup because the string vibrates more toward the center of the string and a strong magnetic field will have more leverage in the neck position than in the bridge position.

    Here is an experiment you can do that will be very educational. Assuming that the string width at the neck position is 1.875 inches wide. Mount 7 0.25 inch diameter magnets such that each string is located in the middle space between magnets and the pull should be less but may also have a different harmonic structure as any horizontal movement will induce a voltage each time it passes the magnetic field side to side. This should emphasize a higher harmonic component.

    Tinkering is very educational and sometimes provides some unplanned results.

    I hope this helps.

    Joseph J. Rogowski
    Last edited by bbsailor; 01-21-2018 at 09:10 PM. Reason: fixed error

  3. #3
    Senior Member
    Join Date
    Jun 2015
    Posts
    141
    Quote Originally Posted by Chris Turner View Post
    Has anyone else used .780" X .25" Alnico rods in their pickups?

    If so, did you notice any issues with string dampening (you know, when the mags pull too hard on the strings and you get that warbling effect)?
    I measured the Gauss at the top of SSL-4 pole pieces, the gauss reading ranged from 600G to 1000G depending on the pole piece. Allegedly they're AlNiCo 5, for which the standard sized pole pieces usually read right about 1050G. AlNiCo 2 poles usually read around 700G. The 1/4" pole pieces might be pulling harder due to their overall larger area of flux, but all in all I don't think it's substantially more or less pull that what you get from smaller sized pole pieces. I think the underlying reason why the 1/4" poles are not significantly stronger is because they're wider, but not taller, so they have a less efficient height to width ratio, with respect to the coercivity AlNiCo 5.

  4. #4
    Senior Member
    Join Date
    May 2006
    Posts
    794
    I have several Tele bridge models that use .800" x .250" A5 rods (and A3), but no neck pickup models of any kind with the big rods. At the bridge there will be far fewer string-pull problems and so I haven't run into any during testing. The neck would be more vulnerable to this but I'm open to big rods for neck depending on customer needs/requests.

  5. #5
    Senior Member Chris Turner's Avatar
    Join Date
    Nov 2009
    Location
    Tucson, AZ
    Posts
    239
    Quote Originally Posted by Zhangliqun View Post
    I have several Tele bridge models that use .800" x .250" A5 rods (and A3), but no neck pickup models of any kind with the big rods. At the bridge there will be far fewer string-pull problems and so I haven't run into any during testing. The neck would be more vulnerable to this but I'm open to big rods for neck depending on customer needs/requests.
    Do you have a source you can share for those .250" X .800" A5 and A3 rods?

  6. #6
    CNC Trial by Fire kayakerca's Avatar
    Join Date
    Jul 2011
    Location
    Ottawa, CANADA
    Posts
    756
    Quote Originally Posted by Chris Turner View Post
    Do you have a source you can share for those .250" X .800" A5 and A3 rods?
    T posted a price list a while back from Magnetic Hold that has both A3 and A5 in size .250" X .800".

    Pickup Makers FAQ
    Chris Turner likes this.
    Take Care,

    Jim. . .
    ____________________________________________________
    In the immortal words of Dr. Johnny Fever, “When everyone is out to get you, paranoid is just good thinking.”

  7. #7
    Senior Member LtKojak's Avatar
    Join Date
    Feb 2008
    Location
    Milano, Italy
    Posts
    942
    Quote Originally Posted by Zhangliqun View Post
    I have several Tele bridge models that use .800" x .250" A5 rods (and A3), but no neck pickup models of any kind with the big rods
    I don't think you'll have any problems with string pull with A3 or even A2 .250" rods in the neck position, Dave. Although I too think they're much more useful in the bridge position.
    Pepe aka Lt. Kojak
    Milano, Italy

  8. #8
    Senior Member
    Join Date
    May 2006
    Posts
    794
    Quote Originally Posted by kayakerca View Post
    T posted a price list a while back from Magnetic Hold that has both A3 and A5 in size .250" X .800".
    They'll make Alnico 2's in that size also. They'll make Alnico rods and bars in almost any dimensions -- I've had them make me some A5's that are .250" x .900".

  9. #9
    ToneOholic! big_teee's Avatar
    Join Date
    Jun 2010
    Location
    Mid-South USA
    Posts
    10,539
    Last edited by big_teee; 02-09-2018 at 03:54 AM.
    Technicians Run the World, but Bankers, Lawyers, and Accountants, Take All The Credit!
    Keep Rockin! B_T
    Terry

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Replies: 1
    Last Post: 05-05-2016, 07:29 AM
  2. Looking for .25"x.25"x2.38" magnets
    By LowNote in forum Pickup Makers
    Replies: 3
    Last Post: 10-10-2015, 07:52 PM
  3. Mesa 5:25 "ghost note"
    By Danglin' Fury in forum Maintenance, Troubleshooting & Repair
    Replies: 5
    Last Post: 12-29-2011, 12:49 AM
  4. 1/4" x 3/4" alnico rods for P-bass pickup
    By GlennW in forum Pickup Makers
    Replies: 8
    Last Post: 02-03-2007, 02:52 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •