GOLDSCAN 5 SCHEMATIC QUESTION

[Orbit]

Simply ,I bought the original design GS 4 analyzing to the detail of the sequence every, detail It's very easy to build GS 5 as well as TDI of course in their own way If it's well understood how it works It's easy to work more design with 2 channels as well as with 4 channels in order to fill shortcomings wherein 2-channel Individual targets inserted in tons of iron It's possible to do a lot point of balance determined tones you also have sd 2000
on the basis of it you can do multiple versions . Otherwise Eric I do not believe will give any information about anything related GS 5 he probably has his reasons ?!

Of course my advice is think with your head and you will find solution and you will be a lot happy with your unique solution !

[sinclairuser]

Hi sinclairuser....ive started making my gs 5 project but at present come to a stop cause of my low mental mood...just cant pick up the soldering iron and do anything...i really want to have a working gs 5 but maybe its going to take some time..i really wish that i had a ready made pcb with normal components which would have been a lot easier for me...but its not an option for me at present....have you made a working gs 5 ???

no mate fell out of love with pi's, currently building a raptor (itmd vlf project), i built a minipulse plus and it works great but the lack of discrimination is a big deal for me, i dont think i can build a better pi than that.
the complete designs are just not there, i know some people think eric should just post the details of the g5, but the fact he has not not done so leads me to the conclusion he cant due to some contractual limitations.
just because he designed it does not mean he can do what he likes with it, he may have had to agree to not develop it further when whites brought out the tdi, who knows its possible, there may even be someone developing a true gs6 with his consent for commercial sale.
i dont know i'm just speculating, what ever the reason the only way to get one is to buy one or build one yourself, which brings me back to the mpp even a gs5 would not be any better for me in my application, so i build stuff that will.
aly.

[daverave]

hi dave, just stick with it mate you will get there in the end, set your table/bench some where bright and comfortable, put it where you can do a few hours and leave it alone if you get frazzled.
when you are ready again sit down and get stuck in, thats how i do it now, three hours then have a break and do other stuff, i can pick it up or put it down so i get the most work done without burning out.
good luck, quite a few people watching the gold scan 5, hoping for a sorted circuit.
aly.

Hi sinclairuser....ive started making my gs 5 project but at present come to a stop cause of my low mental mood...just cant pick up the soldering iron and do anything...i really want to have a working gs 5 but maybe its going to take some time..i really wish that i had a ready made pcb with normal components which would have been a lot easier for me...but its not an option for me at present....have you made a working gs 5 ???

[sinclairuser]

hi dave, just stick with it mate you will get there in the end, set your table/bench some where bright and comfortable, put it where you can do a few hours and leave it alone if you get frazzled.
when you are ready again sit down and get stuck in, thats how i do it now, three hours then have a break and do other stuff, i can pick it up or put it down so i get the most work done without burning out.
good luck, quite a few people watching the gold scan 5, hoping for a sorted circuit.
aly.

[daverave]

i have completed the front end and it all seems to work ok...my coil is different to the spec so may have to experiment with the damping resistor.

[Orbit]

My support !

[daverave]

Dave this is not the default schematic.

I'm using minipulse PSU, integrators like in the GS5 (GS6 - aka serbian goldscan),
all timings controlled by PIC processor (don't yet know the correct timings so I would need to experiment),
experimental snubber (wanted to see any diff if any), 2 stage preamp, similar to GS5, 2 pots for TX width & delay.

Possibly not working at all Will see.

Wowww you have big challenge there to get that working !! ive started my project but im a bit slow in doing things cause of my mind problems...but i hope to get there in the end

[eclipse]

Dave this is not the default schematic.

I'm using minipulse PSU, integrators like in the GS5 (GS6 - aka serbian goldscan),
all timings controlled by PIC processor (don't yet know the correct timings so I would need to experiment),
experimental snubber (wanted to see any diff if any), 2 stage preamp, similar to GS5, 2 pots for TX width & delay.

Possibly not working at all Will see.

[daverave]

Orbit that's needed only if mineralisation is too high and you can't get it to work properly.
Normally you wouldn't want to use channel 2 (GB) cos it will result in less depth for sure.
It's better to have it and not need than to not have it and need it

The board is 2Layer + TH plating, silk screen,without solder mask cos it's too damn expensive (I will make it my self - I have UV paint),
150x100 - and it came to my door at the 4th day for 20$ total. It's a local company that doesn't work on the foreign market.
I just didn't want to make 2 layer board that needed to have TH plating, and don't have time to wait from China.

5 boards like these with good quality with DHL will come to 100$ for 10 days.. but this is just a proto board, I already found a mistake in my drawings

for me channel 2 would be useful on the dry sand to reject some iron and also good for inland...of course for pure depth on wet sand the channel 2 should be switched off.

[daverave]

Orbit that's needed only if mineralisation is too high and you can't get it to work properly.
Normally you wouldn't want to use channel 2 (GB) cos it will result in less depth for sure.
It's better to have it and not need than to not have it and need it

The board is 2Layer + TH plating, silk screen,without solder mask cos it's too damn expensive (I will make it my self - I have UV paint),
150x100 - and it came to my door at the 4th day for 20$ total. It's a local company that doesn't work on the foreign market.
I just didn't want to make 2 layer board that needed to have TH plating, and don't have time to wait from China.

5 boards like these with good quality with DHL will come to 100$ for 10 days.. but this is just a proto board, I already found a mistake in my drawings

looks a very nice pcb...are there no commercial gs 4 pcb's availiable ??? if not maybe silver dog should think about maybe producing these..im sure many people would buy them.

[eclipse]

Orbit that's needed only if mineralisation is too high and you can't get it to work properly.
Normally you wouldn't want to use channel 2 (GB) cos it will result in less depth for sure.
It's better to have it and not need than to not have it and need it

The board is 2Layer + TH plating, silk screen,without solder mask cos it's too damn expensive (I will make it my self - I have UV paint),
150x100 - and it came to my door at the 4th day for 20$ total. It's a local company that doesn't work on the foreign market.
I just didn't want to make 2 layer board that needed to have TH plating, and don't have time to wait from China.

5 boards like these with good quality with DHL will come to 100$ for 10 days.. but this is just a proto board, I already found a mistake in my drawings

[Orbit]

The biggest problem is that the profit is pretty small when switched on channel 2 .

[daverave]

Dave the power supply doesn't emit any noise in the air, why would you want to put it separate? You will gain absolutely nothing. I've tested the PSU from Minipulse - when using the synchro input there's virtually no noise, and when it's not synchronized the noise is terrible. My point is: use Minipulse PSU
My ugly *** board for GS4 just arrived

Hi Eclipse....in some of Eric's designs i think the audio section was mounted in the rear box with the batteries so thought maybe it stops interference from tx section affecting the audio stability...thats great you got a gs 4 pcb..where can you buy them and what's the cost ????

[eclipse]

Dave the power supply doesn't emit any noise in the air, why would you want to put it separate? You will gain absolutely nothing. I've tested the PSU from Minipulse - when using the synchro input there's virtually no noise, and when it's not synchronized the noise is terrible. My point is: use Minipulse PSU
My ugly *** board for GS4 just arrived

[daverave]

Is it best to give the audio circuit a separate power supply and maybe put the audio section into another box separate from main circuit maybe to help reduce any noise ?????