6000D S2

[dbanner]

I had a long look at the White's 6000D series 2 schematic and realized what a solid circuit this is.
I have redrawn the schematic, with a few changes that should make it into a good circuit for home brew diy'er.
Most unattractive of all are those rotary switches which I disposed of forthwith. No battery test required.
Next was the mode switch which can be made into a two position toggle. One for geb normal( fancy term for all metal) and other for geb discrim.( Fancy for discrimination mode). TR discrim and geb Max are rubbish gimmick ( read user manual) nobody will ever hunt in these modes really.
I also dispensed with the depth and meter circuitry, useless in my opinion.
I also changed the clock circuit in favour of a simple 555 timer to generate the clock signal for the 4024.
CD4053 mux stands in for demodulation in place of the previous two chip solution.
The power supply also has been rationalized.
What I ended up with is a more streamlined schematic conducive to home made project.
All that remains is to design a PCB layout.
I'll post the modified schematic later today.

[profesor]

I also changed the clock circuit in favour of a simple 555 timer to generate the clock signal for the 4024.

In this case I wondered how the audio circuit was made.

[dbanner]

The audio is taken from of 4024 driving a bilateral switch for the audio chopper. 555 clock I put little trimmer resistor to fine tune the clock to appropriate frequency. Division down you select the pin. It is flexible design.
Simplicity l try to achieve. You can use 24.37 khz thereabouts( pin 11 drives the tx, pin 4 the audio).

[SWL]

On the Russian site MD4U, a person under the nickname Daemon has already made a modification 6000. Now I am repeating its design ..
http://md4u.ru/viewtopic.php?f=61&t=3115

[Qiaozhi]

На российском сайте MD4U человек под ником Daemon уже сделал модификацию 6000. Сейчас повторяю ее дизайн ..
http://md4u.ru/viewtopic.php?f=61&t=3115[ATTACH]54093[/ATTACH]

Please write in English.

[Nandor]

Im interested!

Happy new year to all

regards

[SWL]

Del

[dbanner]

On the Russian site MD4U, a person under the nickname Daemon has already made a modification 6000. Now I am repeating its design ..
http://md4u.ru/viewtopic.php?f=61&t=3115[ATTACH]54093[/ATTACH]

Very good, but this thread is related only to the 6000D series 2 metal detector. Which I intend to develop here on this thread to a working prototype based on my take on the series 2 schematic.

The schematic you referenced is based on the 5900/6000 di which rightfully belongs in another thread.

[kt315]

DB, i do not keep all DIY files, also names who did, no interest, but i see this matter is not new.
somebody made layout. try to remember...

[profesor]

bluemax deepscan 950 coil has good performance.
having aluminum TX.
I compared it with the Bluemax depscan 950 XL pro coil.
XL pro copper.
aluminum is better.

[Nandor]

Very good design, perfect for coin hunting. Also easy to pinpoint and it covers pretty good area of detection.

[dbanner]

DB, i do not keep all DIY files, also names who did, no interest, but i see this matter is not new.
somebody made layout. try to remember...

Dear kt315, that layout belongs to the series 1 service manual (retraced). The series 2 has never been copied to my knowledge into a working unit. Series 2, unlike the series 1, is a full wave synchronous design. This will be the basis of my take on the series 2 circuit as I stated in first post of this thread. Those who wish to pursue the Russian version almalgum of the 5900/6000di can do so in another thread so as not to confuse the issue here. My focus will be solely on the series 2 schematic and modifications exclusively.
I underake this merely as an academic exercise in a bid to better understand the workings of the circuit, it's limitations and possible improvements.

Here is my schematic. I fill in component values from original schematic tomorrow as I finalize the implementation.

[dbanner]

Why I picked this series two circuit is because there exists a copy of both the 6000d and 6db service manual, explaining in detail the workings of each and every stage of the circuit, along with scope shots and voltages etc. This will help me to get a very comprehensive understanding of how these circuits work, there's no better way to learn the art than to make a solid foundation with baby steps. The circuit may then be refined to squeeze out every bit of improved performance. I'll end up hopefully with a pretty decent metal detector.

[6666]

Dear kt315, that layout belongs to the series 1 service manual (retraced). The series 2 has never been copied to my knowledge into a working unit. Series 2, unlike the series 1, is a full wave synchronous design. This will be the basis of my take on the series 2 circuit as I stated in first post of this thread. Those who wish to pursue the Russian version almalgum of the 5900/6000di can do so in another thread so as not to confuse the issue here. My focus will be solely on the series 2 schematic and modifications exclusively.
I underake this merely as an academic exercise in a bid to better understand the workings of the circuit, it's limitations and possible improvements.

Here is my schematic. I fill in component values from original schematic tomorrow as I finalize the implementation.

Interesting work, I like the nice simple TX osc
are you working off this pdf ?

[dbanner]

Interesting work, I like the nice simple TX osc
are you working off this pdf ?

Yes. That's the one. The series 2 circuit and the 6DB circuit are very similar. Essentially the same circuit with minor variations.

I might be inclined to use a different tx oscillator drive circuit, but for now I will go with the stock design.