Barracuda Legend Kit Problems

[Impulse]

i take that as a no then?

[Impulse]

Ok I have tried the new wire hasn't helped I just get a static like noise if I adjust the delay pot at a certain point I have even tried another coil which didn't help.

[Qiaozhi]

Ok I have tried the new wire hasn't helped I just get a static like noise if I adjust the delay pot at a certain point I have even tried another coil which didn't help.

This might be a stupid question ... but you have actually connected the cable screen to 0V at the PCB?
I see something that looks like it's connected between the cable screen and the PCB in your image, but I'm not sure if that's a wire connection or the plastic covering of the screen.

[Old cart]

Yes this is important. In addition to grounding the cable at the PCB ground, you might try connecting the shield at the cable end as well. Try both connections at the coil, one at a time.

[Impulse]

ok i have tried connecting just one end of the shield and 'nothing' and with the shield connected both ends it is better/more stable so i tried taking one loop at a time off the coil to bring the uH down to 'balance' (Im guessing at this point) the coil and i started with 24 loops 10.5" then as i go down (taking loops/coils off) nothing nothing nothing Then i get to 17 and it gets better so i keep going and i reach 15 and i get a scattered/sketchy signal but about 25-30cm away gold ring, also the coil now picks up a 5p (which it didnt before) at about 20cm so i continue to take loops off and it gets worse about 2 loops in so is the 'sweet spot' about 17 turns? i have also taken the insulation tape off the coil so i can do this. I feel slighty hopeful at this point yay. The o-scope should be here wednesday so i will be able to test the circuit (with your help ) and set it up properly. also with each coil/loop i took off i adjusted the top and bottem pots to get the best distance.

[Old cart]

Impulse, sounds like you are making progress. The performance you are seeing is in the ballpark of the best you can expect. My guess is a tweak of the damping resistor and it will get very usable.

[Koala]

30cm is what I was getting with a ladies wedding ring.

[Impulse]

I'm getting 25 30 cm with a gold sovereign ring kinda thin and the coin moves around its the only solid ish piece of gold I have.

[Impulse]

Hey guys would this be ok for my coil? and what do you suggest i do to 'fill' the surround? Epoxy with glass bubbles? i dont want to add any interference or capacitence in to the coil (i know i need to work on the shield part)

http://www.ebay.co.uk/itm/1118922052...MakeTrack=true

[Impulse]

hey guys my o-scope has arived today i have had a quick look but quickly realised i have no idea , can any one help me set the delay? (sorry i know you guys have helped me out alot but i just need the last nudge over the line please please please, It is a Hantek6022be i have the software installed and i have set the probes up as per the manual.

[Old cart]

hey guys my o-scope has arived today i have had a quick look but quickly realised i have no idea , can any one help me set the delay? (sorry i know you guys have helped me out alot but i just need the last nudge over the line please please please, It is a Hantek6022be i have the software installed and i have set the probes up as per the manual.

I am totally unfamiliar with that model. I suggest you start with the very basics. Google X Y Z's of oscilloscope and read it. It will give you a good background about how scopes work, in general. Then hook your scope on a known signal. A 1 KHz square wave is good and often provided on scopes. Adjust the trigger and vertical size and position so the waveform almost fills the screen vertically and is centered on it and is stable every time it repeats. Play with the the horizontal controls that adjust position and size. Horizontal position may also be under the trigger menu. After a while you should have no problems controlling how you capture and display the waveform.
Key elements
Triggering establishes where on the screen ( vertically and horizontally) the scope places the reference that remains stable.
Vertical controls all vertical attributes of the signal. The key is make the waveform as big as possible without the signal going off the screen.
Horizontal also controls how zoomed in the waveform appears and how it is positioned.
Let us know how this goes.

[Old cart]

Hey guys would this be ok for my coil? and what do you suggest i do to 'fill' the surround? Epoxy with glass bubbles? i dont want to add any interference or capacitence in to the coil (i know i need to work on the shield part)

http://www.ebay.co.uk/itm/1118922052...MakeTrack=true

If the coil fits this should be fine. Most would advise against using epoxy to pot the coil, although glass balloons should help some. As an alternative you can cut and jamb small pieces of syrofoam to center and loosely hold the coil in position. Then a few drops of hot glue should secure it without affecting the coil too much. Another option might be to use the expanding foam cans often used to fills gaps in your house. I have never tried this though and it can be messy.

[Impulse]

ok i have read and understood the general idea of oscilloscopes thanks to google (X Y Z's)

can i ask that you point me in the right direction? eg point A to B for probe 1 AND Point C to D for probe 2, then what to look for and to do? i really want to get out there with it and start digging!

[Impulse]

If the coil fits this should be fine. Most would advise against using epoxy to pot the coil, although glass balloons should help some. As an alternative you can cut and jamb small pieces of syrofoam to center and loosely hold the coil in position. Then a few drops of hot glue should secure it without affecting the coil too much. Another option might be to use the expanding foam cans often used to fills gaps in your house. I have never tried this though and it can be messy.

ok thanks old cart, food for thought i might try the expanding route mabe i can use a small amount in spots and limit the damage!

[Old cart]

ok i have read and understood the general idea of oscilloscopes thanks to google (X Y Z's)

can i ask that you point me in the right direction? eg point A to B for probe 1 AND Point C to D for probe 2, then what to look for and to do? i really want to get out there with it and start digging!

Have you tried the known signal first? This is very important to ensure that everything is working correctly.