Coiltek 18x12 Mono Coilcases........................

[Mega B]

I would like some help please on how Coiltek coilcases are joined ?? i have just received a brand new 18x12 Goldstalker Mono case as in the top and bottom complete with skid plate and pigtail but minus windings,this i assume was from a ex display stand at some time.

So my plan is to wind my own inners for my Crossbow Pulse machine,i already have the wire to wind the coil and also the coil cable etc,but as yet i cannot fathom out how the top and bottom cases are joined,i have checked on YouTube and someone else has repaired the exact same coil due to winding problems but they dont show how they split the coil cases apart.

Are they joined by rubber mastic type of glue as i dont think it would be done with plastic glue but of course i could be wrong,so has anyone done a repair on a Coiltek case,its a brand new case and once i can get them apart i can then wind my own coil then place it into the coilcase that i have just bought.

Any help or advice would be most welcome.

[Mega B]

Problem has been resolved,the top and bottom halves of the coil case have had either plastic glue or heat welded used during construction so they cannot be taken apart,but as the coil has come with a brand new coil protecter on the bottom which is a very good fit we plan on using a wood router to make a channel in the bottom of the coil and then add the windings.Then the coil protector will be glued using silicon glue and no one will have a clue that its be altered in any way.

If at any time in the future it requires a new coil cover all that need too be done is strip the old silicon glue away and then add a new one then re-seal it again.

[Mega B]

This morning we routed a small channel in the bottom of the coil case and this will allow the coil winding to be placed into the Coiltek coil housing,the channel was made just big enough and as luck would have it the cases had all ready been foam filled this will reduce the coil windings from moving around.

Next plan of action will be to do the winding,this has been the daunting stage as this will be the 1st time that i have done anything like this but we will have a go,as for the shielding that is way over my head but after doing some reading it appears that on larger coils its not as important as smaller coils,of course i stand too be corrected on this one as i am a novice,but my detecting is not really near any major sources of EMI so i am hoping that i can get away with it.

If everything goes to plan then the coil should be finished the back end of this week,one thing that i am not 100% sure about is how i connect the coax cable to the coil winding and also the coil connector but i will cross those bridges when i get too them.

Will take a few images when its finished,just hope it all works all right.

[sinclairuser]

Saw your post and thought you should know, silicon sealant can cause problems over time, as it degrades it gives of a gas within the coil shell and causes coil connections to oxidise, which can lead to false signals or even intermittent contact.
its something you should be aware of, some here have used silicon and report no problems, but others have.
i use an epoxy type to seal mine, but thats just a personal choice.

[Mega B]

@ sinclairuser,many thanks for your input,will admit i was not aware about that but will bear that in mind when i finally come to seal the coil case.

[Mega B]

Just finished winding the coil,1st attempt was about 2inches larger than i had expected not really sure what happened but reqound it again and it fits a treat into the coil case.It was not as daunting as i had expected but i have wrapped it so in theory its finished but not taken the final reading of the coil yet as i dont own a inductance meter,so the plan is visit someone who has one or buy a cheap one that i have seen on Ebay.

If the reading of the coil is within spec then the plan is too start doing some tests on it prior to finally sealing the case up,next job on the new coil build is how to attach the coax cable and connecting plug that i am not 100% sure about but it cannot be as daunting as actually winding the coil wire.

Hope the coil performs well,but like most 1st attempts nothing goes too plan.