Mod: EMG Covers for Passive Pickups

Discussion in 'The Sevenstring.org Workbench' started by loktide, Mar 11, 2010.

  1. philkilla

    philkilla Jesus Saves Contributor

    Messages:
    862
    Likes Received:
    102
    Joined:
    Oct 29, 2006
    Location:
    Jacksonville, Florida
    I haven't seen my EMG screws in ages, and the guy that installed the lundgren used different screws to boot...so that made it interesting.
     
  2. Necky379

    Necky379 SS.org Regular

    Messages:
    1,082
    Likes Received:
    108
    Joined:
    Mar 14, 2006
    Location:
    USA
    do you think this would work with an sd invader? i want to do this to my sc-607 but i dont know if the big allen pole pieces will get in the way. should work right?
     
  3. lateralus819

    lateralus819 Mr. legacy

    Messages:
    688
    Likes Received:
    215
    Joined:
    Sep 25, 2009
    Location:
    corinth ny
    Would this work with regular routes? I have some BKPS in my carvin and id love to do this.
     
  4. Groff

    Groff Medicine Chief/RHLC© Contributor

    Messages:
    14,386
    Likes Received:
    1,479
    Joined:
    Jul 10, 2007
    Location:
    South Jersey
    No, they won't fit. The corners of the cover go farther than a standard route.
     
  5. sevenstringj

    sevenstringj Banned

    Messages:
    3,061
    Likes Received:
    230
    Joined:
    Jul 19, 2008
    Location:
    ny
    :bump:

    Just a thought: Could you apply shielding to the inside of that cover and ground it? Wouldn't that provide better shielding than the bridge/strings method? I'm guessing you'd also cover it with tape so it doesn't contact the pole pieces?
     
  6. JordanLee

    JordanLee Star-stuff

    Messages:
    112
    Likes Received:
    93
    Joined:
    Apr 14, 2010
    Location:
    Edmonton AB, CAD
    I REALLY want to do this with my cold sweats and 2228 that are coming next week.

    Quick question to the OP and others equally knowledgable: was there any resolve to DPM's comment about the casing keeping the pups too far from the strings? Is this a significant problem? Obviously, I'd rather have great sounding pups and have them looks messy, than shitty sounding clean ones... But if I can do BOTH! (shakes head in disbelief)
    OP: what are your thoughts? Are you getting good tone (more specifically, the tone you want) with the casings on? Is there enough room to get the
    close enough? If not, can you order a thinner casing?

    Thanks!
     
  7. dpm

    dpm Oni Guitars Contributor

    Messages:
    3,611
    Likes Received:
    439
    Joined:
    Apr 9, 2005
    Location:
    Brisbane, Queensland, Australia
    it really depends on the magnetic field strength of your pickups, if you've got a big ceramic magnet and efficient polepieces it may not effect things too much.
     
  8. JordanLee

    JordanLee Star-stuff

    Messages:
    112
    Likes Received:
    93
    Joined:
    Apr 14, 2010
    Location:
    Edmonton AB, CAD
    Are you, or anyone else, aware if this is the case with the BKP cold sweats? I know nothing about pup magneticism.
     
  9. Spondus

    Spondus SS.org Regular

    Messages:
    659
    Likes Received:
    111
    Joined:
    Apr 26, 2008
    Location:
    S Wales/Oxford UK
    I'm pretty sure it won't have any effect on tone. The magnetic permeability of plastic is very high (as in the magnetic field between plastic and a paramagnet is too small to be felt) and only active pickups need to be placed very close to the strings due to the fact they use weaker magnets and are actively amplified.

    Given that the cases are probably only about 1mm thick, you'd just have to bring the pickups about 1mm close the usual so that the poles of the pickup are at the same distance with respect to the strings with the cover both on and off.
     
  10. JordanLee

    JordanLee Star-stuff

    Messages:
    112
    Likes Received:
    93
    Joined:
    Apr 14, 2010
    Location:
    Edmonton AB, CAD
    Well, I think I'll give it a shot. The other option is to get pickup rings... Anyone know where one could get some for 8 string BKPs?
     
  11. dpm

    dpm Oni Guitars Contributor

    Messages:
    3,611
    Likes Received:
    439
    Joined:
    Apr 9, 2005
    Location:
    Brisbane, Queensland, Australia
    These ones are 2mm thick on top. So let's say that I like the tone and output of my bridge pickup with the poles 1.5mm from the treble E (measured when fretted at the last fret), if we place the same pickup with the cover at 0.5mm from the string (ie. really, really close) that pickup's poles will then be 2.5mm from the treble E. Keep in mind this is when fretted at the last fret so when you're playing down the other end of the neck the pickup will be even further away from the strings, plus generally you'd want the bass side lower compared to the treble for balance so that side of the pickup is further away again... anyways, I tried it with these covers before this thread existed and didn't like the effect, then I set up a jig to machine the inside of the covers to 1mm thick and tonally things worked better but it's a total pain in the ass and the heat from machining can sometimes damage the cover so I stopped doing that too. Like I said, it depends on where you like your pickup relative to the strings and how powerful the magnetic field is.
     
  12. 13point9

    13point9 Now with Less Hair!

    Messages:
    2,051
    Likes Received:
    363
    Joined:
    Feb 16, 2010
    Location:
    London
    Would a hotter pickup, counter this?

    say using BKP's for example, I want the sound of a black dog, but I buy a hotter pup (Miracle man or something like that) and have the cover on it, would this at least in part work?

    n00b question i know but im not to hot on magnetic field dynamics
     
  13. dpm

    dpm Oni Guitars Contributor

    Messages:
    3,611
    Likes Received:
    439
    Joined:
    Apr 9, 2005
    Location:
    Brisbane, Queensland, Australia
    well, it depends on what is making the pickup 'hot'. There are 3 basic ways to increase output, by increasing the number of turns of wire on the coil, increasing the amount of iron in the coil (ie. bigger polepieces), and a larger, more powerful magnet. A hot pickup might have any combination of those factors but the magnet properties and polepiece size are the 2 that will effect the magnetic field out of the top of the pickup.
     
    13point9 likes this.
  14. 13point9

    13point9 Now with Less Hair!

    Messages:
    2,051
    Likes Received:
    363
    Joined:
    Feb 16, 2010
    Location:
    London
    ah ok cool cheers trying to find out as I'm going to be looking at replacing some 707's when I can afford it and don't want the gaping holes haha, I guess pickup rings are the other option...
     
  15. La Lettre B

    La Lettre B SS.org Regular

    Messages:
    9
    Likes Received:
    0
    Joined:
    May 13, 2010
    Location:
    Montreal, QC
    The photobucket links are dead
    Is there a way to re-upload the images?

    I'm about to do this conversion and it would be appreciated.
    Thanks!
     
  16. loktide

    loktide dotlike Contributor

    Messages:
    5,103
    Likes Received:
    986
    Joined:
    Jan 29, 2007
    Location:
    Germany
    yeah, i noticed that. i still have the pics, i'll reupload them later.
     
  17. loktide

    loktide dotlike Contributor

    Messages:
    5,103
    Likes Received:
    986
    Joined:
    Jan 29, 2007
    Location:
    Germany

    fixd
     
  18. La Lettre B

    La Lettre B SS.org Regular

    Messages:
    9
    Likes Received:
    0
    Joined:
    May 13, 2010
    Location:
    Montreal, QC
    I have a question for you.

    Is it still possible to properly adjust the height of the pickup with those covers?
     
  19. EBEADGBE

    EBEADGBE SS.org Regular

    Messages:
    4
    Likes Received:
    1
    Joined:
    Sep 18, 2010
    Location:
    Harrisburg, PA
    ^^^Such good news...the aesthetics was probably the only reason I was debating getting new 8 string pups. Now its a must have.
     
  20. SplinteredSoul

    SplinteredSoul 7 String FTW

    Messages:
    376
    Likes Received:
    8
    Joined:
    May 17, 2008
    Location:
    Greenhithe, Kent
    You sir (loktide) are my saviour. I too am going to Bare Knuckle 8's, and have been tearing my hair out over pickup rings, and expensive custom covers etc., You just made my life a whole lot easier and I thank you!

    Incidentally, since you went from active EMG's to Passive BKP's, how much wiring work did it end up being? Tim at BKP says I'll have to run an earth to the bridge now, which'll be a pain since I have a hipshot hardtail and no trem cavity! Did you have to change the pots too?
     

Share This Page