Tesoro Lobo news

[Pimadoddz]

Which Lobo version is ok?I read that some are wrong

[Sacchetti]

My Lobo is working, but there is a problem with the coil (Tx - 170 coil wire 0.2 - 47n, Rx - 65 turns with wire 0,3 - 6n8, 25 x 12.5) - can not see well in the "all metal", the "discrimination" is much better, but after adjustment potentiometer on the 30% no longer sees metals (R10 - 100K). By moving relative to each coil, I noticed that at some point the speaker is silent, and here begins widzić metals. In the most optimal point on the oscilloscope is a graph as in this picture of "my lobo" (measuring points at the exit to the coil). With a genuine Lobo noticed that the chart here is a little different (photo of "original lobo" - the second sine wave is almost flat despite the same oscilloscope settings). When I try to get a graph similar to the original in my lobo stops working properly (adjustable potentiometers on the board also does nothing). My question is whether it can change the number of turns in the coils? Thank you for all the answers.
1. My Lobo
[ATTACH]25623[/ATTACH]

/ 2.Oryginal Lobo
[ATTACH]25624[/ATTACH]

Hi ZL17,
please, can you enlarge the rx signal on original lobo to see better the phase shift compared to tx?
Thank you.

Best regards

[Sacchetti]

Hello polkruv,

I actually have a problem with the coils and it does not benefit the development of the lobo.

I have an original and SEF coil for tecknetics T2 (14kHz). I searched the web connectivity but I have not found. I made measurements on the connector but we must know whether he did it not integrated component in the coil .. (or other capacity). if anyone has any info on the connections of the coils could be used as ca.

On my diagram is not very complicated, all components are in the exact recommended value on the schematic of FOMA. and my PCBs from the site of REDRAM

The only difference is the value of capabilities that are tailored to my coils.

To answer your question, following the patterns of FOMA
(TX = 65 rounds of 0.28mm 1.33mH and RX 170 rounds of 0.22mm = 10.97 mH)

I measured 2.6 mH TX / RX 11ohms and 28.2 mH / 50 ohms.

I'll post the diagram connector coils and T2 readings tonight.

Maybe she could be compatible with the lobo. Legaucho said it worked okay, but he did not pursue testing ground ...

thank you for your help

Hi Zoomix,
the ohm value of your coil is right but mH are double therefore I suspect you confused diameter with radius.
Try to rebuild a new coil using half dimensions.

Bye

[Hannu]

[kt315]

http://www.md4u.ru/download/file.php?id=8186

[Hannu]

LOBO M.LAY6, IC 7555 pins 3 and 6 connected. I think this is not correct. Should be pin 2-->6.?

[Hannu]

a layout of lobo M from vlaser.

[ATTACH]31986[/ATTACH]
[ATTACH]31987[/ATTACH]

What kind of diode is D1? Same sound circuit is used in "verator 3" and "thunder 7".

[kt315]

Final Results.pdf

My 8 inch Tesoro concentric coil has gone intermittent. I completely destroyed
it trying to take it apart and repair it. I did manage to make some measurements
during the process and decided to build a copy as best I could.
This is my fist attempt at metal detector coil building. My background is
designing and building magnetic resonance coils for research projects at VHF and
UHF frequencies but not 17.5 KHz. I thought this would be fun project and maybe I
could learn something in the process. This blog has been more than helpful when
it comes to information although the Tesoro Lobo Supertraq doesn't seem to have
many followers. I thought I should contribute.
This is my finished coil. I made a document in case I had to do this again in
the future and thought maybe the information could be useful to someone else.

Thanks,

Praco

[paku]

a layout of lobo M from vlaser.

[ATTACH]31986[/ATTACH]
[ATTACH]31987[/ATTACH]

dear,
KT315

what is the coil spec

[bernte_one]

many thanks

some nice days to you all

and dont loose any fingers on sylvester

[greylourie]

Kevs Lobo Lite

Christmas present. You will need to download Target3001- PCB Pool version from somewhere. Hope attachment works.

Kevs Lobo Lite.zip

[bernte_one]

oh yes
the lobo m layout is really good

i will get some double sided foto pcb from bungard the next days
so i have a good base to escape from my mother in law over christmas holidays

[kt315]

a layout of lobo M from vlaser.


LOBO M.rar

[kt315]

test of Lobo mod on ring daddy and a file (not mine).

[kt315]

lobo schematic moded