Hi all , hi Gary ,.....comment on your pulse 1 , I'm very impressed with this build Gary. This machine is ultra stable and I really like the non motion side of the device . You have mentioned a few times that shielding isn't necessary on the coils ( I live on an Australian goldfield ) , however if I was to install shielding will this have any detrimental effect on the performance of the detector. I will be using graphene /graphite ....50 - 80 % single to 3 layer atomic carbon . This has a higher conductivity than normal graphite but I'm sure it is low enough so as not to allow eddy currents to perpetuate. And its not as messy or non adhesive , just paint it on (2 coats at 90 degrees to each other and a buff when dry ) even insulation tape will stick to this stuff. On a lighter side if I added enough graphene ( I make my own through electrochemical exfoliation of graphite sheet ) and compressed it with another compound I would have a coil cover you could not pierce with an AK47 .....actually true! Anyway I digress , I'm sure I will find out the hard way but that would mean pulling the coil apart again , they are never the same when disturbed . Cheers Dave.
Thanks Gary , that's what I wanted to hear . So shielding it is then . Yes you have spoken with me a couple of times recently ( Dave .H . from N.S.W. ) regarding a kit . All good and is running like a clock ! My high tech phone wont send picture msg's nor will wifi or blue tooth work .'No driver exists' says the computer .So I'm going to resort to my computers web cam by holding things in front of it and taking a photo ..sigh .Hopefully I will be able to post them ......Cheers Dave.
Appreciate your posting this project along with the interesting photos. As you use your detector more, please let the forum know about its performance (e.g., depth of detection, shielding effects, battery life, what you would change if you made another one, etc.). Nice job!
Thanks , Radioman . I get out as much as I can around here . Mineralization is monumental here and diminishes the depth of detection considerably on ANY type of detector .I have been experimenting with various types of shielding but nothing seems to get more depth . Admittedly I have been prospecting a reef so there are all kinds of rich deposits of minerals . The site near the reef has yielded many items , mostly iron and aluminium also a few coins . So I know the detector is working ok . You just have to accept the ground noise and try to "tune" around it. By the way I have other detectors , a Garrett AT Pro and an Ace . The ground drives both these machines nuts ....and me . I have found the Surf PI build to be better than both ! in dealing with ground noise . The Pulse 2 is much the same as the Surf in respect of noise but personally I prefer using it to all my detectors . Gary ... if you ever come up with a discriminating circuit that's not too complicated and can be incorporated into the P2 please let me be the first to know... hehe . I'm currently working on getting correct induction on a DD coil for the TGSL build . Not as easy as I thought , when the coils are restrained the induction increases too far even though I allow for the increase .( going through heaps of wire )Theres no going back after super glue is applied .So its trial and error for me .Even though coil inductance is off the machine still works ok . I just want the best build I can realize for my knowledge and skill level. I will start recording my finds ...as in what metal , depth found at , size, weight and mineralization levels .Thanks for your interest RM . Cheers ,Dave .
Thanks Gary , for the clarification . I can still convert the board to pulse II though , cant I ? I should probably get another board from you . On the ground noise issue what I said about disc. I was talking in general terms , not the best way to get an idea across , I'll try to be more specific . And yes ,DD coils . When I finally get the process right to get accurate inductance I will make several sizes to test . Thanks for the input ,cheers Dave.