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Well actually, You and the detector aren't grounded at all. What happens, more so on warmer windy days, is you get static charge build up on the detector ground(case, shaft, coil shield) as well as your body(which is also isolated from the ground and the detector) So, what you will notice, the...

Welcome to the forum! Yes, that one is done by Detectormods, Link Technologies. Cheers Mick

Now that is interesting! Seemed to work quite well at the test patch. Might have to get me one of these when they are available. Cheers Mick

Most li-po that are intended for use in Rc cars etc don't have any sort of protection circuit. The protection is left up to the charger and the device it is used in. If the packs are built specifically for use with electronics then they might have a protection circuit built in. To test the one...

Hi Marcus, To replace the cell in the WM12 module, just find another cell of the same measurements. The capacity will be close enough. I would suggest re-using the protection circuit from the original cell, but that is your choice. Li-ion and Li-po are exactly the same chemistry. The only...

Hi Bush, So to hook that one up, the thicker wire is for the main windings. The outter of the smaller wire is for the shield and the the inner, connect that to the winding that the inner of the other cable connects to. This will be for the RX. Then at the plug, the two outter wires are...

Hi 19.3, The Mavic Pro battery actually charges up to about 4.5v/cell as compared to most normal li-ion/li-po cells. I can't remember the exact name for the cell type used in the Mavic battery. So with that in light, that is why they recommend that the battery be stored in a partially...

Hi Bush, :8 What have you done??!! Now, one thing I didn't know until very recently is that Minelab are using a separate wire for the coil shielding and joining it to coil ground at the coil plug. Conventionally the coil shield is tapped off from the ground connection to the coil where the...

Hi Esky, I haven't done anything as yet to make it smoother, that is the next job on the list. It is the one thing about the sdc, it's a chattery little thing! In fact, it is also quite heavy, it feels much better balanced with an 18" coil attached to the end! The only Evo tests I have done so...

So, the Sadie coil, bolts up and finds gold! Literally put the coil on the detector, fired it up, put it on the ground, weeeoooo. Nah, gotta be a pellet. Cranked up gain a bit just coz, oh that brightens it up some, take a scrape, out, in my hand, 0.03g tiddler! Unfortunately I couldn't keep...

Hi Bush, It sounds like the coil plug has been wired correctly. The false signals from your hand happen because there is no shielding around the control box and the capacitance from your hand has an effect on the coil receive. With the breeze causing your machine to become erratic, that is a...

The three wires are, red= coil ground black = coil transmit yellow= receive I have here an sdc2300 for repair(it is repaired) and the owner has given his blessing to investigate what modifications might be useful for it. Once warranty runs out on these units, genuine service is a bit of a...

Yes the receiver unit has push button volume control. The supplier for the Li-po packs is the same one that Ismael used for the Little Ripper. Cheers Mick

BigL, I can't help you on the VLF side of things as I will most likely lead you astray! If you haven't already join up to geotech there is so much info on vlf detector theory etc as well as pi. https://www.geotech1.com/forums/forum.php As for a Super D coil for a GPX, that could work. There...

Well I don't know that I would admit to that! The Busy B DBV weighs just under 500g and holds enough charge to detect for 8 to 10hrs, only has one lead between your battery and detector and 1 lead to charge both the receiver and battery all for $400, now that is :power: Cheers Mick

How long does it run on a single charge?

Hi Ded, Just for reference that diagram is from here> http://www.minelabmods.com/joomla3/index.php/news/120-sd2000-circuit-diagrams BigL, I'm not sure what actual difference a faster/slower resonant frequency coil will make on a PI other than initial settling time. I would have to test them...

It isn't putting an rf frequency into the coil It is turning the coil on for 240uS reaching a current of about 2.5A in the coil, which then switches off and the magnetic field collapses back into the coil in about 3~5uS, energising the target. From this point, the coil needs to settle to no...

Basically, the frequency I speak of is the engine that controls the timings. Speed it up and sample delays, transmits and cycle time are shorter. When you adjust the manual tune, you adjust this frequency. Pulse induction doesn't work like vlf (Continuous wave) detectors. Vlf detectors do have...

2.4mhz to 2.5mhz and it varies when you hit autotune or manual tune. The detector clock frequency doens't change between the timings, but the timing cycle time does. If you are asking in terms of a transmit waveform, the cycle time being different between different timings, then technically the...