Tweet
I've found it very interesting following the threads about coil making and maybe one day I will have a go myself once I get all the right equipment. I do see and have read elsewhere that getting the coil just right for each detector is a very intricate and time consuming procedure for the electronic enthusiast. At present, I own a non mainstream detector where the manufacturer claims that, "each detector coil is individually calibrated, balanced and tested before each one leaves the factory". I was wondering how they do this. I can understand it if it means a simple adjustment is made inside the detector but surely they don't spend a lot of time on each of the hundreds of manufactured coils before they are sealed in resin. I think that the coil manufacture part of the process is possibly carried out by a different factory where the corresponding detector to which it is to be fitted would not be to hand anyway, though I may be wrong about that. I would be interested to read opinions on this matter from the very knowledgeable people on this forum. If someone wants a different size coil for instance, the serial number of the present fitted coil has to be sent to the factory so that you get a corresponding new coil with electronic characteristics that match your individual machine. I always thought that detector manufacturers allowed for a certain amount of tolerance in coils etc, which facilitates the ease of replacing and where desired, the fitting of an after market coil. (I am not talking about Nautilus Detectors; I know they had to physically open their coils to repair and adjust them)
-
-
Don't be cryptic. Say that you have a Blisstool. That's a line from their marketing. No other manufacturer would consider it a good thing, matching machine and coil, as it makes coil interchangeability difficult. Instead, they make the coils to a specification, and the detector to a specification, the result being they will always work together.
And yes, a significant time is spent making and adjusting high-end coils, that's why they are expensive. Budget concentric coils have less demands made on their spec, and they can be machine-wound precisely enough that less adjustment is needed, hence they cost less. -
Thanks for your reply Skippy, I think that does answer my query very well and you're right, there is no after market coil for my detector, nor likely to be from what you say. Excuse my being cryptic on the forum. Some "other forums" (won't name them) can be very touchy and you can get banned quite easily if you talk about something they don't like.Comment
-
"each detector coil is individually calibrated, balanced and tested before each one leaves the factory".
Well to calibrate it you just measure inductance, to balance you null it and to test plug it into a metal detector.
Wording in adverts can sound like more than what is going on. Most detectors have a wide range of L and C
they can work with. The most critical thing is the null. It can change when the glue dries ruining your coil.
The manufacturers use self gluing wire and don't fill the housing with epoxy many times. Some of the new
high end detectors will adjust for differences in the coil.
I say buy a couple spools of wire and give it a go. That and a few caps and a connector and you can see
if there's anything to be gained.
My experience is that there's a lot of learning needed for the process but once you have it down you can
make a coil in 1/2 hour or so that works fine! It's nice because if you get and idea you can whip up a new
coil and try it.
I'm experimenting with center tapped coils and more windings on the RX. No major improvements yet but
I'm having fun (and learning a lot).Comment
-
Hi Muddy... You allready know my answer.
Its not true that every Blisstool sold only will work with those coil's delivered from the factory. (Serial no.) But If you shall start your first coil project, I'm ready to help you and so will others. It should Be easy because I allso got a Blisstool (even got two), just say go and we do it together.
HenrikComment
-
Thanks Henrik, I've got to get a scope etc first and read Carl's book before I'm ready, so I'll be a while yet but this is something I've always been interested in. I keep studying all the posts and pictures on this forum about it but I have so much to learn. I didn't realise you made a 13" coil for your Blisstool, were you pleased with it's performance out in the fields? I am also interested in the possibility of hooking up a meter to the Blisstool which will help with Ground Balancing and Iron identification. I did fix an adjustable Ground Balance Pot to a Toltec 80 where before it only had fixed GB but that was an easy job.Comment
-
Yes Muddy.. Scope and a Inductance meter will Be needed. Alternative to the Inductance meter is a tone generator to find the resonans
with a capacity, that even more accurate than a cheap meter. ( Ive learned that with Skippy's help, when the resistance changed at the coil work and my meter was not accurate and I had to trust my work was okay by the resonans).
And old 10 mhz scope should be out there somewhere and this Inductance meter is what I got (not the best but Very cheap)
link. http://www.reichelt.de/Multimeter-di...1&GROUPID=4058
This meter can many things - Very universal . 29.95 € can't Be found much cheaper.
Henrik.Comment
-
You need to get Moodz and Aziz on this thread. They both are experts on coil building and design!!!!Comment
-
Unlike you
Comment
-
-
No, instead I said you are certainly not an expert. In a more relaxed tone, even if you have expertise in any of the art, you are very successful in hiding it. So your expertise doesn't show. At all.Comment
-
Originally posted by Davor View Post
Come on Davor. Have I ever said I knew about building coils? All I know is that Aziz boast that he is the expert. And I guess Moodz is following in his footsteps.
If any member here trys to show that they know more than any one else about coils, it has to be Aziz with his boasting. Am I wrong? If so you need to brush up on understanding english my friend.Comment
-
Kneel down PJ! The coil "expert" is coming...*LOL*Originally posted by PATCHES JUNIOR View Post
At least I can find the answers, that no one obviously can.
Even Mr. Candy can't do it!!! *LOL*
^sifComment
-
I think Davor said that in a little teasing and in a relaxed tone...friend to friend.
Comment
-
Patches junior knows a lot about nothing of the art as is evident by his post here and elsewhere!Originally posted by Davor View PostComment
Comment