Compadre Schematics

[simonbaker]

Hi Simon,
sorry I haven't Compadre... just know that things cause I've made bandidoII and golden-sabre... so know about weakness of oscillator power and effects of rising the power there.

I assume data are correct cause they are really close to what I expect from a circuit like compadre, but never tested one.

I think you can compare results with 1eur coin using some other bimetallic coin with diameter of 23mm, made of nickel alloys.

Extern ring of 1eur is something 65%copper, 25%zinc and 10%nickel; inner is something more nickel... formerly is CuNi25 alloy... but I think the nickel percentage is more than 25%... rest is copper.

Don't you have nickel coins there ?

Kind regards,
Max

Ok, I'll melt down some nickels .

- Do you think it would be possible to use an audio transformer to boost the coil voltage somehow instead of new power supply?

[simonbaker]

Hi SB,
I think a more easy way to gain a little depth would be to turn up the sensitivity pot on CB some, that should help some, I know it did on mine.

Is that the "VR4" trimmer pot shown mentioned above? Did you just open the case and adjust it yourself? Or did you mount a new pot on the case?

When adjusting sensitivity, what test procedure did you use to decide on the best setting?

Thanks,
SB

[Steve in MS]

Thanks for clarifying. I thought maybe you had other mods as well. Your unmodified Compadre seems to go a lot deeper than mine, but I don't have any Euros to test with, just American coins.

Can you do a test with American coins and the unmodified voltage (9v) so I can compare my depth with yours? I would appreciate it greatly.

Cheers,

SB

Hi SB,
I think a more easy way to gain a little depth would be to turn up the sensitivity pot on CB some, that should help some, I know it did on mine.

[Max]

Thanks for clarifying. I thought maybe you had other mods as well. Your unmodified Compadre seems to go a lot deeper than mine, but I don't have any Euros to test with, just American coins.

Can you do a test with American coins and the unmodified voltage (9v) so I can compare my depth with yours? I would appreciate it greatly.

Cheers,

SB

Hi Simon,
sorry I haven't Compadre... just know that things cause I've made bandidoII and golden-sabre... so know about weakness of oscillator power and effects of rising the power there.

I assume data are correct cause they are really close to what I expect from a circuit like compadre, but never tested one.

I think you can compare results with 1eur coin using some other bimetallic coin with diameter of 23mm, made of nickel alloys.

Extern ring of 1eur is something 65%copper, 25%zinc and 10%nickel; inner is something more nickel... formerly is CuNi25 alloy... but I think the nickel percentage is more than 25%... rest is copper.

Don't you have nickel coins there ?

Kind regards,
Max

[simonbaker]

Hi,
if you read above you'll find:

"
Depth detection with this mod increasing:

9V ....... 1EUR ...... cca 25-27cm/air
12.5V ... 1EUR ...... over 30cm/air

Tested and 100% work

With 12.5V need stabil. 9V for suplly power box.
12.5V is only to TX section.
"

So... just change the TX voltage and you gain easy depth, but do it just if you know what you are doing... making mistakes is not reccomended on original boards...it's at your own risk.

If you put more voltage there... you'll get higher peak-to-peak voltage at tx sinus wave, so higher magnetic field too, that's why you can gain depth this way. Putting 12.5V there means you got something around 24Vpp at tx that's fairly hi voltage for a tx oscillator that normally runs at less.

You have now just 10Vpp in original compadre... so having 24-25Vpp means you increase get 150% (about) more power on your tx coil.

Kind regards,
Max

Thanks for clarifying. I thought maybe you had other mods as well. Your unmodified Compadre seems to go a lot deeper than mine, but I don't have any Euros to test with, just American coins.

Can you do a test with American coins and the unmodified voltage (9v) so I can compare my depth with yours? I would appreciate it greatly.

Cheers,

SB

[Max]

My new Compadre maybe gets 13 cm (5 inches) in air with American coins -- how in the world do you get 25 to 30 cm? Wow. What do you get with unmodified detector? Which mods give you 25 to 30 cm depth?

Hi,
if you read above you'll find:

"
Depth detection with this mod increasing:

9V ....... 1EUR ...... cca 25-27cm/air
12.5V ... 1EUR ...... over 30cm/air

Tested and 100% work

With 12.5V need stabil. 9V for suplly power box.
12.5V is only to TX section.
"

So... just change the TX voltage and you gain easy depth, but do it just if you know what you are doing... making mistakes is not reccomended on original boards...it's at your own risk.

If you put more voltage there... you'll get higher peak-to-peak voltage at tx sinus wave, so higher magnetic field too, that's why you can gain depth this way. Putting 12.5V there means you got something around 24Vpp at tx that's fairly hi voltage for a tx oscillator that normally runs at less.

You have now just 10Vpp in original compadre... so having 24-25Vpp means you increase get 150% (about) more power on your tx coil.

Kind regards,
Max

[simonbaker]

Hello - my modify Tesoro Compadre

Depth detection with this mod increasing:

9V ....... 1EUR ...... cca 25-27cm/air
12.5V ... 1EUR ...... over 30cm/air

Tested and 100% work

With 12.5V need stabil. 9V for suplly power box.
12.5V is only to TX section.

Sorry my bad english


Michal

My new Compadre maybe gets 13 cm (5 inches) in air with American coins -- how in the world do you get 25 to 30 cm? Wow. What do you get with unmodified detector? Which mods give you 25 to 30 cm depth?

[ms.nomi]

Michal, you can do a converter on 44 Volts, turn to TX stage and knock out by depth us.

truly yours

I make external battery box with 3x LION battery = cca 12.5V

why 44V ?

BR

Michal

[kt315]

Michal, you can do a converter on 44 Volts, turn to TX stage and knock out by depth us.

truly yours

[Max]

Hi,

yes, tested with standart Compadre coil (5,75 inch)

Stability OK - no without change.

Michal

Hi Michal,
really interesting.
1eur at 30cm air test with a 5.75 inch coil is a very good result,
much similar to PI performances than standard VLF.

Is about 2 times the diameter of the coil.
Very good.

I'll try similar mod. on TGoldenSabre soon and see results there.

Kind regards,
Max

[ms.nomi]

Hi Michal,
have you used a standard coil for it ?
I detect 1eur at 30cm in ground with an homemade DD22 on bandidoII.

I also think that putting small more voltage on osc section could give a boost in depth... like happens in other tesoro's models.

What about stability ? Have you noticed any difference on the field ?

Best regards,
Max

Hi,

yes, tested with standart Compadre coil (5,75 inch)

Stability OK
Michal

[Max]

Hello - my modify Tesoro Compadre

Depth detection with this mod increasing:

9V ....... 1EUR ...... cca 25-27cm/air
12.5V ... 1EUR ...... over 30cm/air

Tested and 100% work

With 12.5V need stabil. 9V for suplly power box.
12.5V is only to TX section.

Sorry my bad english


Michal

Hi Michal,
have you used a standard coil for it ?
I detect 1eur at 30cm in ground with an homemade DD22 on bandidoII.

I also think that putting small more voltage on osc section could give a boost in depth... like happens in other tesoro's models.

What about stability ? Have you noticed any difference on the field ?

Best regards,
Max

[ms.nomi]

Modify compadre

Hello - my modify Tesoro Compadre

Depth detection with this mod increasing:

9V ....... 1EUR ...... cca 25-27cm/air
12.5V ... 1EUR ...... over 30cm/air

Tested and 100% work

With 12.5V need stabil. 9V for suplly power box.
12.5V is only to TX section.

Sorry my bad english


Michal

Who is ....

Hello Cesar!
Who are you? Are you from Bulgaria or Zoran from Zajecar?
I know Zoran, he selling some hand-mades labeled "Cesar"...for 260e
All imported from Bulgaria as kit complet.
Not so bad detector, but lacks of instabillity also to inert on small items.
Coil i dont like mostly. Impossible pinpointing....
Since my friend has it, and have a lot of problems with it...is there any chance to adjust it better?
When testing in the air - good results. But in the ground - not so good.
I think disc is unadjusted well. Not discriminate well. But it is not about
detector, must be unadjusted? Any tip?
Rgards!

[ms.nomi]

All this info was collected in this forum. Maybe helps you.

Hi Esteban,

red switch? What func?
value for red rezistor?

(tesoro compadre schematic)

Thanx

Michal

Sorry my english....