Page 1 of 3 123 LastLast
Results 1 to 35 of 93

Thread: Spin Doctor type gauss meters?

  1. #1
    Member
    Join Date
    Apr 2008
    Posts
    22
    Thumbs Up/Down
    Received: 4/0
    Given: 5/0
    Rep Power
    0

    Spin Doctor type gauss meters?

    I am looking for a good used working condition Spin Doctor gauss meter if anyone has one that they are willing to sell. Just message me a price you want for it with shipping in the U.S.

    0 Not allowed! Not allowed!
    Last edited by big_teee; 05-09-2019 at 08:22 PM.

  2. #2
    Member
    Join Date
    Feb 2015
    Posts
    139
    Thumbs Up/Down
    Received: 42/0
    Given: 3/0
    Rep Power
    5
    If you cant find one heres what we've been using for the last 25 years https://www.alphalabinc.com/product/gm1-st/

    0 Not allowed! Not allowed!

  3. #3
    Member jack briggs's Avatar
    Join Date
    Oct 2007
    Location
    Raleigh
    Posts
    268
    Thumbs Up/Down
    Received: 1/0
    Given: 7/0
    Rep Power
    12
    Quote Originally Posted by Lollar Jason View Post
    If you cant find one heres what we've been using for the last 25 years https://www.alphalabinc.com/product/gm1-st/
    and I've got one of these for sale........

    0 Not allowed! Not allowed!

  4. #4
    Senior Member
    Join Date
    Dec 2007
    Location
    Poland
    Posts
    1,637
    Thumbs Up/Down
    Received: 47/0
    Given: 14/0
    Rep Power
    13
    I work on a similar project. Should be ready soon (at the moment the OLED display is missing). The software is already written (but not tested). But sending it from Europe to the US may be quite expensive.

    Mark

    Click image for larger version. 

Name:	gauss_meter.jpg 
Views:	99 
Size:	158.3 KB 
ID:	50275

    0 Not allowed! Not allowed!

  5. #5
    Senior Member
    Join Date
    Dec 2007
    Location
    Poland
    Posts
    1,637
    Thumbs Up/Down
    Received: 47/0
    Given: 14/0
    Rep Power
    13
    Initial test of the meter (Musicman bass):
    Click image for larger version. 

Name:	DSCF1229s.jpg 
Views:	70 
Size:	165.7 KB 
ID:	51328
    Test with neodymium magnet:
    Click image for larger version. 

Name:	DSCF1227s.jpg 
Views:	78 
Size:	134.8 KB 
ID:	51329
    It looks like milling the enclosure (in low quantities) is very difficult - no one wants to do it . I still need to design the front sticker for the meter.

    1 Not allowed! Not allowed!

  6. #6
    Senior Member
    Join Date
    Mar 2018
    Location
    Germany
    Posts
    1,371
    Thumbs Up/Down
    Received: 973/1
    Given: 640/2
    Rep Power
    4
    Quote Originally Posted by MarkusBass View Post
    Initial test of the meter (Musicman bass):
    Click image for larger version. 

Name:	DSCF1229s.jpg 
Views:	70 
Size:	165.7 KB 
ID:	51328
    Test with neodymium magnet:
    Click image for larger version. 

Name:	DSCF1227s.jpg 
Views:	78 
Size:	134.8 KB 
ID:	51329
    It looks like milling the enclosure (in low quantities) is very difficult - no one wants to do it . I still need to design the front sticker for the meter.
    Please note that the readings of the flux density at the poles are changed (increased) by the presence of the strings.

    0 Not allowed! Not allowed!
    - Own Opinions Only -

  7. #7
    Senior Member
    Join Date
    Dec 2007
    Location
    Poland
    Posts
    1,637
    Thumbs Up/Down
    Received: 47/0
    Given: 14/0
    Rep Power
    13
    Yes, it was just a test whether it works . And it works.

    0 Not allowed! Not allowed!

  8. #8
    Supporting Member John_H's Avatar
    Join Date
    Jul 2006
    Location
    Las Vegas Nevada
    Posts
    1,131
    Thumbs Up/Down
    Received: 264/1
    Given: 255/0
    Rep Power
    14
    It looks like milling the enclosure (in low quantities) is very difficult - no one wants to do it
    Have you considered 3D printing, or vacuum forming? Either of these you could do yourself.

    1 Not allowed! Not allowed!

  9. #9
    Senior Member
    Join Date
    Dec 2007
    Location
    Poland
    Posts
    1,637
    Thumbs Up/Down
    Received: 47/0
    Given: 14/0
    Rep Power
    13
    No, but I'm considering buying a mini CNC machine. I may use it in other projects.

    1 Not allowed! Not allowed!

  10. #10
    Old Timer J M Fahey's Avatar
    Join Date
    Oct 2007
    Location
    Buenos Aires, Argentina
    Posts
    11,209
    Thumbs Up/Down
    Received: 1,388/18
    Given: 1,056/27
    Rep Power
    26
    Just curious:

    Whatīs wrong with the beige plastic case you are already using?

    Is Eagle Audio your own brand or that of a commercial field sensor head?

    Thanks.

    0 Not allowed! Not allowed!
    Juan Manuel Fahey

  11. #11
    Senior Member
    Join Date
    Dec 2007
    Location
    Poland
    Posts
    1,637
    Thumbs Up/Down
    Received: 47/0
    Given: 14/0
    Rep Power
    13
    Quote Originally Posted by J M Fahey View Post
    Just curious:
    Whatīs wrong with the beige plastic case you are already using?
    Is Eagle Audio your own brand or that of a commercial field sensor head?
    Originally there are no holes in the enclosure. The most difficult to make is the hole for the OLED display. I marked it with a sharp knife and filed it. Should be done with a CNC machine.
    EA it's my own brand.
    Click image for larger version. 

Name:	Enclosure_02.jpg 
Views:	32 
Size:	48.5 KB 
ID:	51332

    1 Not allowed! Not allowed!

  12. #12
    Supporting Member
    Join Date
    Nov 2016
    Location
    Nova Scotia
    Posts
    148
    Thumbs Up/Down
    Received: 56/1
    Given: 149/1
    Rep Power
    3
    Depending on what your production quantities are, you could make a template that attaches to the screw holes in the case and use a router with a guide bushing to make the cutout. A 3mm or so bit would give a nice small radius in the corners.

    3 Not allowed! Not allowed!

  13. #13
    Member
    Join Date
    Jan 2016
    Location
    USA
    Posts
    114
    Thumbs Up/Down
    Received: 101/6
    Given: 153/6
    Rep Power
    4
    The owner's Manual for the gaussmeter at the link listed in posts #2 and #3 includes some very interesting information about magnets and the earth's magnetic field.

    1 Not allowed! Not allowed!

  14. #14
    Senior Member
    Join Date
    Dec 2007
    Location
    Poland
    Posts
    1,637
    Thumbs Up/Down
    Received: 47/0
    Given: 14/0
    Rep Power
    13
    Quote Originally Posted by Bloomfield View Post
    Depending on what your production quantities are, you could make a template that attaches to the screw holes in the case and use a router with a guide bushing to make the cutout. A 3mm or so bit would give a nice small radius in the corners.
    I was also thinking about such a template but to make it I need a CNC machine too. Or I have to pay someone to do it. I would use 2 mm bit to get 1 mm radius in the corners. I don't expect high production quantities. Just few friends asked me to manufacture something like this .

    0 Not allowed! Not allowed!

  15. #15
    Supporting Member
    Join Date
    Nov 2016
    Location
    Nova Scotia
    Posts
    148
    Thumbs Up/Down
    Received: 56/1
    Given: 149/1
    Rep Power
    3
    A nice thing about router bushings (especially if they are large) is that they will tend to even out small flaws in the template. If you filed out the template as well as you filed out the prototype, I think you could get a very nice end result. Some of my homemade pickup cutout templates look fairly crude, but do a good job in the end.

    0 Not allowed! Not allowed!

  16. #16
    Old Timer J M Fahey's Avatar
    Join Date
    Oct 2007
    Location
    Buenos Aires, Argentina
    Posts
    11,209
    Thumbs Up/Down
    Received: 1,388/18
    Given: 1,056/27
    Rep Power
    26
    Agree, I have done the same many times.
    Spending 1 hour rough cutting, filing and, worst of all, not getting a perfect result is a downer if it has to be made for each and every case, but spending, say, 2 hours for a perfect template is worth it, since afterwards each case will take minutes and be well finished.

    The router flute cuts along the edge, and any small error or roughness is way more tolerable than the "across the grain" irregular hand sanding, so that alone makes it worth routing.

    And you donīt *really* need a template to cut a rectangular window with sides parallel to case faces!!!!

    Mount the router under a table where only bit is visible, say 10mm above the surface, then do a little measuring and Math and bolt/nail/clamp 4 straight pieces of wood to serve as a "fence" around the case, so it can only move along those edges in a straight line, and so a rectangular window is the only geometrical shape which can be cut.

    Hope this is clear enough, if *neccesary* I can draw it but hope we can avoid it

    3 Not allowed! Not allowed!
    Juan Manuel Fahey

  17. #17
    Supporting Member
    Join Date
    May 2006
    Location
    PDX
    Posts
    3,267
    Thumbs Up/Down
    Received: 30/0
    Given: 14/0
    Rep Power
    18
    I'd think a small laser would do a fine job of the holes and display cutout. The problem with milling these is that the odd shape needs to be fixtured to the milling table and that's going to be a challenge. A laser doesn't push your part around, you just need to place it accurately so very minimal fixturing is needed. I'd call around to laser places locally and see what they'd charge you, I doubt it would be more than a euro or two per shell if you did them in batches.

    Routing might work but most plastics melt at such low temperatures you could easily end up with just a big ugly blob of molten plastic stuck to the bit and a deformed mess of your enclosure. If you try this get a single flute bit designed for plastic and attach a strong vacuum cleaner under the table to pull the chips away and cool the part as quickly as possible. Spraying the part with isopropyl alcohol can also lubricate the cut and help keep things cooler via evaporation. Exhaust the vacuum outdoors so you don't inadvertently create a flame thrower in your shop. Be sure to run the router at the slowest speed until you know what will happen. Move the part as quickly as possible past the cutter to minimize heat build up. As soon as the plastic melts and sticks to the cutter things will go downhill very rapidly.

    2 Not allowed! Not allowed!
    Last edited by David King; 12-03-2018 at 07:51 PM.

  18. #18
    Senior Member
    Join Date
    Dec 2007
    Location
    Poland
    Posts
    1,637
    Thumbs Up/Down
    Received: 47/0
    Given: 14/0
    Rep Power
    13
    Good idea with laser. Let me check it. Thanks.

    Mark

    0 Not allowed! Not allowed!

  19. #19
    Senior Member
    Join Date
    Jan 2009
    Posts
    616
    Thumbs Up/Down
    Received: 5/0
    Given: 4/0
    Rep Power
    11
    Quote Originally Posted by MarkusBass View Post
    I was also thinking about such a template but to make it I need a CNC machine too. Or I have to pay someone to do it. I would use 2 mm bit to get 1 mm radius in the corners. I don't expect high production quantities. Just few friends asked me to manufacture something like this .
    Hi Mark
    You could try selling them as a kit. My elepro meter was delivered as parts. I'd probably have one of yours as a spare is always useful and i'm in Europe as well.
    Cheers

    Andrew

    0 Not allowed! Not allowed!

  20. #20
    Twobie
    Join Date
    Dec 2018
    Posts
    3
    Thumbs Up/Down
    Received: 0/0
    Given: 0/0
    Rep Power
    0
    Quote Originally Posted by MarkusBass View Post
    Good idea with laser. Let me check it. Thanks.

    Mark
    Markus,

    Can I contact you in some way to order such a meter? Thanks!

    0 Not allowed! Not allowed!

  21. #21
    Senior Member
    Join Date
    Dec 2007
    Location
    Poland
    Posts
    1,637
    Thumbs Up/Down
    Received: 47/0
    Given: 14/0
    Rep Power
    13
    Quote Originally Posted by vintagemgear View Post
    Can I contact you in some way to order such a meter? Thanks!
    Yes, you can always send me a private message. But I don't know your location and the meter is not yet completed.
    The cutout for the OLED display is done with a laser (thanks David). It's not bad but I think that milling would be more accurate. Now I'm working on the sticker for the meter.

    Mark

    Click image for larger version. 

Name:	Enclosure_03.jpg 
Views:	39 
Size:	120.7 KB 
ID:	51583

    1 Not allowed! Not allowed!

  22. #22
    Twobie
    Join Date
    Dec 2018
    Posts
    3
    Thumbs Up/Down
    Received: 0/0
    Given: 0/0
    Rep Power
    0
    Quote Originally Posted by MarkusBass View Post
    Yes, you can always send me a private message. But I don't know your location and the meter is not yet completed.
    The cutout for the OLED display is done with a laser (thanks David). It's not bad but I think that milling would be more accurate. Now I'm working on the sticker for the meter.

    Mark

    Click image for larger version. 

Name:	Enclosure_03.jpg 
Views:	39 
Size:	120.7 KB 
ID:	51583
    It seems I'm not allowed to view your profile in order to send you a DM? I registered yesterday, not sure why I can't do that.
    Can you write me one?

    Thanks

    0 Not allowed! Not allowed!

  23. #23
    Senior Member
    Join Date
    Dec 2007
    Location
    Poland
    Posts
    1,637
    Thumbs Up/Down
    Received: 47/0
    Given: 14/0
    Rep Power
    13
    If I click on user name left to the post, there is a popup menu with "Private Message" option. But not in your case. It looks like starting members cannot send/receive private messages. At least you can update your location in your profile .

    Mark

    0 Not allowed! Not allowed!

  24. #24
    Twobie
    Join Date
    Dec 2018
    Posts
    3
    Thumbs Up/Down
    Received: 0/0
    Given: 0/0
    Rep Power
    0
    Mark,

    Please send me an email to *************, thank you!

    0 Not allowed! Not allowed!
    Last edited by vintagemgear; 12-19-2018 at 03:11 PM.

  25. #25
    Junior Member
    Join Date
    Jun 2014
    Location
    UK
    Posts
    9
    Thumbs Up/Down
    Received: 2/0
    Given: 1/0
    Rep Power
    0
    Quote Originally Posted by MarkusBass View Post
    Yes, you can always send me a private message. But I don't know your location and the meter is not yet completed.
    The cutout for the OLED display is done with a laser (thanks David). It's not bad but I think that milling would be more accurate. Now I'm working on the sticker for the meter.

    Mark

    Click image for larger version. 

Name:	Enclosure_03.jpg 
Views:	39 
Size:	120.7 KB 
ID:	51583

    Ahh, this is exactly what I need. Is there a waiting list I can sign up to for when it is completed? Hopefully by then I'll have the option of sending you a PM...

    0 Not allowed! Not allowed!

  26. #26
    Senior Member
    Join Date
    Dec 2007
    Location
    Poland
    Posts
    1,637
    Thumbs Up/Down
    Received: 47/0
    Given: 14/0
    Rep Power
    13
    No, there is no a waiting list. At the moment I have two prototypes and I can sell just one of them. Then, if there is an interest, I'll make some more meters.
    But please remember that I'm located in Europe and if you are e.g. from the States or Australia it will be difficult to these countries. I mean very expensive. What is your location? You can update it in your profile.

    Mark

    0 Not allowed! Not allowed!

  27. #27
    Junior Member
    Join Date
    Jun 2014
    Location
    UK
    Posts
    9
    Thumbs Up/Down
    Received: 2/0
    Given: 1/0
    Rep Power
    0
    I'm in the UK, but rather bizarrely the forum won't let me view or edit my own profile.

    I've no idea if this is a deliberate restriction or a weird bug.


    SirPrimalform, you do not have permission to access this page. This could be due to one of several reasons:

    Your user account may not have sufficient privileges to access this page. Are you trying to edit someone else's post, access administrative features or some other privileged system?
    If you are trying to post, the administrator may have disabled your account, or it may be awaiting activation.

    0 Not allowed! Not allowed!

  28. #28
    Senior Member
    Join Date
    Dec 2007
    Location
    Poland
    Posts
    1,637
    Thumbs Up/Down
    Received: 47/0
    Given: 14/0
    Rep Power
    13
    There is some policy that you need at least 5 posts to perform some actions. But why would they restrict user from editing his own profile (like adding user location) this is hard to understand. In my opinion this is a bug in the forum software.

    Mark

    0 Not allowed! Not allowed!

  29. #29
    ToneOholic! big_teee's Avatar
    Join Date
    Jun 2010
    Location
    Mid-South USA
    Posts
    11,161
    Thumbs Up/Down
    Received: 744/32
    Given: 722/14
    Rep Power
    21
    Quote Originally Posted by SirPrimalform View Post
    I'm in the UK, but rather bizarrely the forum won't let me view or edit my own profile.

    I've no idea if this is a deliberate restriction or a weird bug.
    I agree, you need more posts, for more privileges.
    T

    0 Not allowed! Not allowed!
    Last edited by big_teee; 01-25-2019 at 04:47 PM.
    It's only Rock and Roll, but I like it!

    Terry

  30. #30
    Junior Member
    Join Date
    Jun 2014
    Location
    UK
    Posts
    9
    Thumbs Up/Down
    Received: 2/0
    Given: 1/0
    Rep Power
    0
    Oh well, if it's only 5 posts needed it won't be long!

    0 Not allowed! Not allowed!

  31. #31
    Senior Member
    Join Date
    Dec 2007
    Location
    Poland
    Posts
    1,637
    Thumbs Up/Down
    Received: 47/0
    Given: 14/0
    Rep Power
    13
    At the moment I have 2 prototypes but only one of them is for sale. But if there is a bigger interest I can make some more.
    It looks like this:
    Click image for larger version. 

Name:	GM_04.jpg 
Views:	71 
Size:	146.7 KB 
ID:	52136
    I still plan to redesign the front sticker to look more professional.

    Measurement of a Celestion speaker in Marshall JCM900:
    Click image for larger version. 

Name:	GM_05.jpg 
Views:	65 
Size:	216.3 KB 
ID:	52137

    4 Not allowed! Not allowed!

  32. #32
    Junior Member
    Join Date
    Jun 2014
    Location
    UK
    Posts
    9
    Thumbs Up/Down
    Received: 2/0
    Given: 1/0
    Rep Power
    0
    I sent you a PM, but it hasn't shown up in my "sent" folder, so let me know if you didn't get it.

    0 Not allowed! Not allowed!

  33. #33
    ToneOholic! big_teee's Avatar
    Join Date
    Jun 2010
    Location
    Mid-South USA
    Posts
    11,161
    Thumbs Up/Down
    Received: 744/32
    Given: 722/14
    Rep Power
    21
    Quote Originally Posted by SirPrimalform View Post
    I sent you a PM, but it hasn't shown up in my "sent" folder, so let me know if you didn't get it.
    Looks like you were able to update your profile after 5 posts.
    Is that correct, I would like to know for future reference?
    T

    0 Not allowed! Not allowed!
    It's only Rock and Roll, but I like it!

    Terry

  34. #34
    Junior Member
    Join Date
    Jun 2014
    Location
    UK
    Posts
    9
    Thumbs Up/Down
    Received: 2/0
    Given: 1/0
    Rep Power
    0
    Quote Originally Posted by big_teee View Post
    Looks like you were able to update your profile after 5 posts.
    Is that correct, I would like to know for future reference?
    T
    Actually, it seemed to be after 4 posts. I was able to set my location and (attempt to) send MarkusBass a PM before making that fifth post.

    0 Not allowed! Not allowed!

  35. #35
    Junior Member
    Join Date
    Jun 2014
    Location
    UK
    Posts
    9
    Thumbs Up/Down
    Received: 2/0
    Given: 1/0
    Rep Power
    0
    Quote Originally Posted by big_teee View Post
    ...
    T
    I've replied to your PM, let me know if you get it (my sent messages folder is still empty for some reason).

    0 Not allowed! Not allowed!

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Gauss Meter for Sale
    By RedHouse in forum Tools and Coil Winding Gear
    Replies: 1
    Last Post: 01-25-2010, 02:41 PM
  2. Gauss meter bit it
    By Bill M in forum Tools and Coil Winding Gear
    Replies: 3
    Last Post: 10-08-2009, 04:03 AM
  3. Gauss meter
    By clown_luthier in forum Pickup Makers
    Replies: 7
    Last Post: 07-03-2009, 03:18 AM
  4. Gauss meter
    By markeymark in forum Pickup Makers
    Replies: 14
    Last Post: 02-10-2007, 09:44 PM
  5. gauss meter... How much do I need to spend?
    By corduroyew in forum Pickup Makers
    Replies: 18
    Last Post: 11-14-2006, 12:17 PM

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
  •