1. #1
    Sven1's Avatar
    Join Date
    Jun 2010
    Location
    Ontario, Canada
    Posts
    43

    Making a Surfmaster PI Pro Coil Sink

    So I got one of those foam filled floating searchcoils that came on the used unit I bought dirt cheap. It didn't come with the epoxy filled sinking diver coil.

    Pretty annoying to have the coil want to float upwards as well as needing extra muscle to keep it down....

    Decided it needed weight, I actually made a quick mold using the coil and scrap cardboard.

    My first attempt molding a weight was a bit heavy, to much weight in the tip area.

    Decided to make another again using sand and epoxy resin I had on hand using what I learned from the first weight..


    I mixed up exactly 10 oz. of sand with 5 fluid oz. of mixed 2 part epoxy. Stirred
    the sand in until it was a nice thick paste like texture. spread the mix into the mold
    with the majority of it pushed back to the rear of the search coil. Tilted the front
    of the coil upwards to make sure the mix would not flow towards the coils front.

    I popped it out of the mold, it weighs in at 13 oz.

    Placed it back on the coil, filled up a tote with water
    and placed it into the water. 13 oz. is the perfect weight that will make the coil slowly sink
    in freshwater.


    The weight has now been painted white, a few days of drying and it will be ready to use.

    Still deciding how to attach the weight so it is removable for dry sand hunting. 2 sided tape, velcro, cable ties...
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	DSC06163.JPG 
Views:	430 
Size:	184.0 KB 
ID:	63952   Click image for larger version. 

Name:	DSC06162.JPG 
Views:	334 
Size:	186.3 KB 
ID:	63953   Click image for larger version. 

Name:	DSC06161.JPG 
Views:	318 
Size:	180.5 KB 
ID:	63954   Click image for larger version. 

Name:	DSC06177.JPG 
Views:	358 
Size:	157.6 KB 
ID:	63955   Click image for larger version. 

Name:	1.JPG 
Views:	965 
Size:	146.5 KB 
ID:	63957  

    Click image for larger version. 

Name:	2.JPG 
Views:	485 
Size:	147.6 KB 
ID:	63956  

  2. #2

    Join Date
    Jun 2010
    Location
    Mariposa, Ca (49er Gold Country)
    Posts
    842
    That is an awesome job in solving that problem.. wtg

  3. #3
    deolslyfox's Avatar
    Join Date
    Jul 2008
    Location
    Central Florida
    Posts
    44,669
    Pretty kewl. We used to use a bag of glass marbles tied to the shaft ....
    If there's anything I hate worse than diggin' pulltabs, its missin' a gold ring.

  4. #4
    Nitro 54's Avatar
    Join Date
    Mar 2005
    Location
    S.W. Orygun
    Posts
    27,760
    Kooks good,,, Thats one way to skin a cat
    Ineptocracy [in-ep-toc'-ra-cy] - a system of government where the least capable to lead are elected by the least capable of producing, and where the members of society least likely to sustain themselves or succeed, are rewarded with goods and services paid for by the confiscated wealth of a diminishing number of producers. There are three classes of people: those who see...those who see when shown...and those who do not see. - Leonardo da Vinci

    FNH FNX 40

  5. #5
    cnr_dogs's Avatar
    Join Date
    Aug 2008
    Location
    South Central Idaho
    Posts
    4,565
    great mod i would attach it with velcro cable ties

  6. #6
    Sandals's Avatar
    Join Date
    Oct 2008
    Location
    Suffolk Cty., Long Island NY
    Posts
    8,211
    very clever!!!
    *************************** To errr is human.....To arrr is Pirate **************************

Posting Permissions

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

Log in

Log in