Tesoro Bandido III

[Aleks85]

Hello, there are such files, as I understand their author is a man from France. He made Bandido for himself and therefore called it Bandido III. Maybe someone knows the details? Maybe someone made himself the same? I would appreciate any information. Thank you.

[Carl-NC]

All I can offer is the schematic I drew out many years ago. I also made a "Bandido III" with some circuit mods, although I don't know where any documentation of changes might be. This was 20 years ago.



[ATTACH]n416595[/ATTACH]

[Aleks85]

Thanks for the interesting scheme. I'll add more files.

[ivconic]

All I can offer is the schematic I drew out many years ago. I also made a "Bandido III" with some circuit mods, although I don't know where any documentation of changes might be. This was 20 years ago.

"HEADPH" !!!???
What a laziness!
Or... spectacular talent for abbreviations!

[ivconic]

Gerber files for that pcb have been present on my account for months, ie. in "wish list" at JLPcb.
I really like how it's drawn, although I have some minor gripes.
And I especially don't like Tesoro's tendency to put potentiometers, switches and buttons close to the front of the pcb
and connect them with a bunch of wires.
That's why I haven't ordered those pcbs to be done yet.
I'm postponing everything because I intend to put the potentiometers (at least) directly on the pcb, which will certainly
increase the dimensions of the pcb itself.
And the second, more important reason is the production of the coil. I struggled with it too much and now I no longer have the will to do such a thing.
If I come across an original one; I might decide to make one.
By the way, I've had 2-3 original Bandidos so far. I'm not impressed with the depths. Everything else is correct.

[Aleks85]

I didn't quite understand - what is the difficulty with the Bandido coil? The inductance is known to be TX 5.75 mH,RX 6.20 mH. For example, I conduct experiments with TХ. I wound TX with a 0.4 mm wire - the amplitude is small - 6 volts, then I wound TX with a 0.35 mm wire - the amplitude became 13 volts - this is already better. I plan to try a 0.31 mm and 0,25 mm wire - it should be even better. All resistors, capacitors and transistor remained the same during the experiments.It turns out that the amplitude depends only on the diameter of the wire!
RX can be configured by connecting instead of TX or by a separate generator.TX is configured less at 1100 Hz than RX - right?
The work is difficult, but interesting.It seems to me that for Bandido the wire diameters TX and RX should be different.For example, if TX is 0.35 mm, then RX is 0.25 mm.

[ivconic]

I didn't quite understand - what is the difficulty with the Bandido coil? The inductance is known to be TX 5.75 mH,RX 6.20 mH. For example, I conduct experiments with TХ. I wound TX with a 0.4 mm wire - the amplitude is small - 6 volts, then I wound TX with a 0.35 mm wire - the amplitude became 13 volts - this is already better. I plan to try a 0.31 mm and 0,25 mm wire - it should be even better. All resistors, capacitors and transistor remained the same during the experiments.It turns out that the amplitude depends only on the diameter of the wire!
RX can be configured by connecting instead of TX or by a separate generator.TX is configured less at 1100 Hz than RX - right?
The work is difficult, but interesting.It seems to me that for Bandido the wire diameters TX and RX should be different.For example, if TX is 0.35 mm, then RX is 0.25 mm.

At the time I was making numerous TGSLs, IGSLs and several other diys based on Tesoro detectors; I made approx. 200 coils, probably few more than that, I lost count.
That's the "difficulty"... I am pretty much fed up with such jobs!
And then I discovered all the beauty of using stock coils with my diys.
When you drive a Trabant or a Wartburg or even a Yugo... you usually don't complain, everything is fine.
But once you switch to Mercedes... no one can make you go back to your old ways.
That's the "difficulty"!

[kt315]

it is just a project ... i do not see real board soldered and checked.

[Aleks85]

Almost soldered, but not yet tested - there is no time. I asked a question about something else - read the first post of KT315. If this topic is not needed, I ask the administrator to delete it.
Ничего со временем не меняется, всё как и было!

[Carl-NC]

Apparently this is the battery check mod I did on my Bandido III:

https://www.geotech1.com/forums/foru...tery-check-mod

[ivconic]

Apparently this is the battery check mod I did on my Bandido III:

https://www.geotech1.com/forums/foru...tery-check-mod

Oh man!
Those times... of dial up "joys"!
I was not memebr yet, just visitor.
It took me "hours" to download simpler schematic!
Then print it on b/w matrix printer!
What a "joy"!

[ivconic]

Almost soldered, but not yet tested - there is no time. I asked a question about something else - read the first post of KT315. If this topic is not needed, I ask the administrator to delete it.
Ничего со временем не меняется, всё как и было!

Neat and tidy!
I like it!

[Aleks85]

Я хотел бы задать несколько вопросов о вашей схеме Carl. C7 является ли этот конденсатор не полярным электролитом? Резистор R30 с номинальным значением 1k, у вас ошибка печати R28 100k? Правильна ли емкость конденсаторов C10, C13, C14, C16, C18? Является ли это оптимальным значением емкости? Thanks.

[ivconic]

Я хотел бы задать несколько вопросов о вашей схеме Carl. C7 является ли этот конденсатор не полярным электролитом? Резистор R30 с номинальным значением 1k, у вас ошибка печати R28 100k? Правильна ли емкость конденсаторов C10, C13, C14, C16, C18? Является ли это оптимальным значением емкости? Thanks.

Translated:

"I would like to ask a few questions about your schematic Carl.
C7 is this capacitor a non-polar electrolyte?
Resistor R30 with a nominal value of 1k, do you have a R28 100k print error?
Is the capacitance of capacitors C10, C13, C14, C16, C18 correct?
Is this the optimal capacity value?"

[Carl-NC]

C7 can be anything you like, it makes little difference. I would just use a ceramic cap.
Yes, it should be R30 @ 1k.
No idea on the other caps. These were measured values but I don't remember if I took the caps off the board to measure.