GOLDSCAN 5 SCHEMATIC QUESTION

[eclipse]

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

[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.

[Orbit]

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

[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.

[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.

[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 !

[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.

[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 ?

[gaby_sult]

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

[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.

[daverave]

Thats good to hear, what opamp did you use ?

Hi 6666....i used the NE 5534 and the AD 8055...and seems to work ok....as i progress with the GS 5 project i will post my findings and hopefully we can all get a GS 5 working...i feel eric's GS 5 design is the best pulse detector and the most exciting to try and build.

[gaby_sult]

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.

Frankly, I'm sick of people coming to such responses, I dont lack of money and I have 30 years experience behind.
I thought this forum shared the experience not arrogant.
Now I understand on Ivconik.
Anyway, thank you for your prompt response, a good day.

[kt315]

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

Eric wasted HD with whole info. if you are able with your perfect English to get any files - gerber, pics of board, sketches - from him
i will be greatley appreciated your forum's job (home work) just i am able to reestablish the board.
my speciality on high school (university) is a constructor-technologist of computer hardware.

[Orbit]

Talk when Ivconic . A very big loss for the forumall would is served on a tray !

[Qiaozhi]

Frankly, I'm sick of people coming to such responses, I dont lack of money and I have 30 years experience behind.
I thought this forum shared the experience not arrogant.
Now I understand on Ivconik.
Anyway, thank you for your prompt response, a good day.

I think what eclipse is simply saying is that a complete set of build instructions is not available for the GS5, as no-one has invested their time and money is producing a working clone. We often get members who request that projects are handed to them on a plate, hence the comment: "Do you want coffee with that?". People will only produce fully documented working projects if they have an interest in it themselves. For example, the MiniPulse Plus was produced because I personally bought a non-working MiniPulse on eBay, and back-engineered the design before developing it further. This cost me both time and money, and I did not make even one penny from the project. Likewise with the Baracuda. Due to several members having some severe problems with the original design, I decided to take a look and managed to locate a catalogue of design errors. This resulted in the Geotech Baracuda REV-A, from which I also did not receive even one penny.
So don't be surprised if you receive a negative response when you ask for the "whole circuit (PCB) with all the modifications and maximum performance".

If there is sufficient interest in developing a GS5 clone, then no doubt someone will take on the challenge. But I wouldn't hold your breath, as the Surf-PI is a popular project that also does not have a complete set of build instructions, despite members every now and then expressing an interest in creating one.