I am giving away $25 to whoever sends me info about Lorenz coils

[AlexP]

I need the coil connector wiring for a small (26cm, 35cm or 45cm) MONO coil (for DD will be good too) for Lorenz. It is different from the connector wiring for large coils - e.g. 1m x 1m coil, which I already have. So if you have one of those coils, I just need you to disassemble the connector, take a photo of how the wires of the coil cable are soldered to the connector pins and send it to my e-mail address (p.m. me for details). In return, I will send you $25 via PayPal. You must have a PayPal account.

[Alexismex]

Hope ii help you
Regards

[Mrand]

As the supplement. For the monoloop diam. 450mm.
Pin1 is connected with pin2, pin5 with pin6, pin3 with pin7. Concentric cable - "masse" is attached to pin1+pin2 and "hot" is attached to pin3+pin7.
Mrand

[AlexP]

Thanks Alexis and Mrand. I am just back from field testing my Lorenz and am pretty happy with the results. It will probably become my main coin machine now. Nothing too spectacular, but for coins it gets depths that none of my other detectors can reach. I don't have an oscilloscope to measure the frequency, but I suppose it was working correctly - at 1300 pulses per second as opposed to 700 pulses per second (as when the coil was connected in the same way as a 1m x 1m coil). The detector was producing higher pitched tones and it was "faster". The increase in sensitivity to coins was obvious as well.

I started with the diagram that Alexis provided for a DD coil and assumed that for a Mono coil it will be like this - see my diagram below. This is eactly as Mrand says. I was using my 12" Dual Field coil from my White's TDI (330uH, 3 Ohms or so), but only the outer of the two coils of the Dual Field. I connected it to pins 1 and 7 of the Lorenz connector with a special adapter which I made. The inner coil of the Dual Field is not used and being a metal object it reduces the sensitivity of the coil, I suppose. I will probably get more depth with a simple mono coil. But it still was very good.

Mrand, do you know the Inductance and the Resistance of the 45cm mono coil?

Alexismex, since you replied first and your diagram was useful to me, p.m. me or send me by e-mail your e-mail address that is registered with PayPal and I will send you $25.

[Mrand]

According to my measurement, the 450mm monoloop has: L=356uH, R=1.4ohm, selfresonace is 410kHz.
Mrand

[AlexP]

Thanks Mrand!

[Alexismex]

Thanks Alexp ,
i am happy your lorenz work well,
- last year i have to fix a repair for a Lorenz dead completly
i pass all the day to encounter the fail ....it was in the power regul board ( chance they did not have put black resin) where you have many 12V regulators etc.... and it was a very very small 1/8 resistor of 220R and i change this very small resistor and all the lorenz work again!!!!
I was very deception for me to Lorenz .... for this kind of high price equipment ..... they put this small 1/8 resistors (if one time you see this board.....you will understand me) and they have many place in the board to have put ALL RESISTOR at 1/4
....it is ridiculous because in a way you have a disproportional heavy duty components an another very fragile resistors !!!!!

But it is market place and selling ......
Thanks for the 25 $.... better give to a poor people you see in the road....ok
Regards
Alexis.

[AlexP]

Hi Alexis. Thanks for your help. I am not into electronics, but I agree with you that Lorenz detectors are very overpriced. All metal detectors are overpriced, but Lorenz are way too much. No wonder why they are so uncommon. However, their build quality is very high and they work very well. And unlike other PI detectors, they work at high frequencies which makes them sensitive to non-ferrous objects. If I take two objects of the same shape and size and one of them is ferrous and the other is non-ferrous, my Pulse 5 will detect the non-ferrous object from a greater distance. The new Deepmax series Lorenz detectors have some sort of ground eliminating feature and if the depth capabilities don't suffer when this feature is used (which I am not sure of as most PIs lose depth when the GB is used), then I've got to have one.