GOLDSCAN 5 SCHEMATIC QUESTION

[eclipse]

Do you want a coffee with that? it is obvious that only interested people in investing time and money will be able to MAYBE get it working to certain point. Dont expect full working PCB with a step by step instructions and modification for maximum performance..., as these will probably never become avaialble.

Thank you Eric for the info on that 4001.

[gaby_sult]

Regards, is anyone able to post the whole circuit (PCB) with all the modifications and maximum performance?

[6666]

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.

Thats good to hear, what opamp did you use ?

[Ferric Toes]

Hi Orbit...i think the 4001 is a delay to stop any "blair" from the audio on switch on...maybe eric can correct me on this if am incorrect.

Yes David, that is correct. Just enough delay for the electronics to settle down before releasing the Jfets. The circuit is not an oscillator. There is a redundant line on the circuit as posted with no connection points. The supply is +5 and -5V.

Eric.

[Orbit]

Stops high tones that they do not interfere with the low tones , when you cross the target that there is no prolonged tons ..stop any "blair" , but I did it with 20hz and it works its function ! Capacitor goes to the pin 11 directly !

[daverave]

Orbit are you sure the output of the "auto tune" or whatever it does, the section with CD4001 is 20Hz?
If that is the case we can use something else to generate the 20Hz signal.
It can probably be tuned to appear 1 time on every 100 TX cycles, before TX signal.

Hi Orbit...i think the 4001 is a delay to stop any "blair" from the audio on switch on...maybe eric can correct me on this if am incorrect.

[eclipse]

Orbit are you sure the output of the "auto tune" or whatever it does, the section with CD4001 is 20Hz?
If that is the case we can use something else to generate the 20Hz signal.
It can probably be tuned to appear 1 time on every 100 TX cycles, before TX signal.

[Orbit]

Hello Eric !What is specifically obtained with a different approach In the section ground balance at gs 5 In relation to gs4 ?

[daverave]

Hi Dave,

Yes, it would have if I completed it. The big box GS6 has an inlet air filter and an extractor fan to keep the internal heatsink on the TX down to a reasonable temperature; and of course the rest of the electronics. The one in the foreground has a large heatsink under the box.

Look out for a PM.

Eric.

[ATTACH]40031[/ATTACH]

Hi Eric..i like the way you attached the heat sink to the bottom of the die cast box...are the batteries fitted internally ??? i like the design very much.

[eclipse]

Thanks for sharing the info Eric.
I love it - overclocked PI

[Ferric Toes]

Hi Dave,

Yes, it would have if I completed it. The big box GS6 has an inlet air filter and an extractor fan to keep the internal heatsink on the TX down to a reasonable temperature; and of course the rest of the electronics. The one in the foreground has a large heatsink under the box.

Look out for a PM.

Eric.

[Jose]

Thanks Eric, for posting the GS5 times, it is the first time I see the times of separation between both channels.
Mu good photos, beautiful machine !!
Jose

[daverave]

Hi Eric....Is that a gs6 in the last photo with the tdi pro top section ??? that looks amazing detector !!! does it have the same power as the bigger boxed gs 6 ???

[Ferric Toes]

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.

The true GS6 was developed 5 years ago. Two versions made, although the lighter one was never completed. A bit different to the GS5 as it used the lapsed Paltaglou patent. Worked just fine and excellent GB but ran out of time to continue. The differential coil set-up was to cancel emi, but I found that it was not really necessary. Still have both and still no time due to a long legal battle on another matter. We won the case so it is now costs and damages to sort out which will take another year.

I'm trying to recover GS5 data, much of which was on a computer HD that failed, so watch this space. One bit of info to get the ball rolling - the minimum sample delay was 10uS; all sample pulses are 15uS and the delay from the end of the 1st sample to the start of the GB sample was 5uS.

Eric.

[daverave]

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 !

from what i heard from someone white's are not going to develop the tdi platform anymore...most of the gs 5 schematic is posted on here anyway...does not seem white's care about that schematic posted on this site...although gs 5 and tdi are the best pi detectors in my view they are still a minority market so its not really a big deal.