Clone PI-W

Hi folks.
I've built a chance v 1.2.1 and currently am using the coil from my minipulse.
While it works quite well I'm not sure if I could get better depth/discrimination. Also it's heavy!
I made a basket coil as per the specs previously mentioned but comes up around 90uH? The only difference is that I used insulated wire but core is the same..  When connected it does work and detecting a gold ring about 15cm but the 9640s are buzzing like mad! 
I'm a noob so please be gentle  if I'm missing something obvious! 
I'm guessing I need more windings or thinner wire?  Any help gratefully received.


Posted on: August 11, 2015, 07:00:45 am

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Hi folks.
I've built a chance v 1.2.1 and currently am using the coil from my minipulse.
While it works quite well I'm not sure if I could get better depth/discrimination. Also it's heavy!
I made a basket coil as per the specs previously mentioned but comes up around 90uH? The only difference is that I used insulated wire but core is the same..  When connected it does work and detecting a gold ring about 15cm but the 9640s are buzzing like mad! 
I'm a noob so please be gentle  if I'm missing something obvious! 
I'm guessing I need more windings or thinner wire?  Any help gratefully received.


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Thanks Bernte_one.
I should have thought about it before I had wrapped it! 
I guess I will unpick this one and make another with the same former. I made this just for testing but if all goes well I will make another finished housed one... I hope!

Posted on: August 11, 2015, 10:04:44 am

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Hi guys,  I made another coil for testing with magnet wire this time but it still comes out almost the same as before. 
Before I go any further,  is this a double sided coil? If so that's the problem! 
Once again thank you for any help.

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Hi Nickel_n
Thank you, this has confirmed what I was thinking.
I'd only wound wire on to one face of the ply!
I better get some more wire eh 
If you could share any info you have on your coil It would be much appreciated, its not been easy finding all the correct information.
Its been driving me mad today trying to understand what the problem was.
I know its a bit of an ask but could you explain a little how to start the coil please,
eg: do I wind one side and then flip it and do the same? <or> do I start at point A and move along X (I cant remember the number of divisions off the top of my head right now)
then cross over to the other side advance another X and then back over and so on?
Once again cheers for the help, its appreciated


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Cheers Nickel_N, I need to make another former then. 
The one I made before I'd made notches to pass the wire under and back up (like a peg) but look forward to seeing your information when you have the time.
With regards to the minipulse,  I've no idea what it is like for prospecting but can tell you that on the beach and heavy clay mud it's a great machine and found me an 1855 gold ring.  I think it's my favourite so far &  can work within 3 or 4 meters of my mate with a surf pi with almost no interference. I recommend you stick a volume control though as it's mega loud! Hope you get your parts soon.

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