For sale pcb Fortuna M2/M3 and M3

[blobber]

[TufaN]

many thanks blobber

[TufaN]

I wanted to draw it myself. Can you tell your ideas? Beautiful or not?

[blobber]

Well done!

[TufaN]

Thanks Blobber

[Suvabard]

Hello does anyone know what would cause the 'NO COIL' message during GB? Coil is plugged in and detects 1GBP coin 5inches away. The coil I'm using is the 8" eurotek as used by this blogger:
https://metaldetectormilano.com/2020...tek-su-quasar/
https://metaldetectormilano.com/2020...ra-quasar-arm/

Here is the message on the screen:
:


Setting:


Also, what depth should I expect from this coil size?

[blobber]

Sorry for my very long delay, but i was busy with other doings.
Did you solved the problem? If not, please follow this procedure.

Well, i see in your pictures, that your coil is not in resonance, because the current is much to small.

At first you only need the TX1 and TX2 connection on the pcb.

TX1 connect in series, for example with a 470 nF cap and with one end of the transmitter coil.

TX2 connect with the other end of the transmitter coil.

The goal now, is to find the resonance frequency in this TX-coil-circuit.

Later we will do the same on the TX outputs, to find the resonance frequency for RX-coil-circuit.

We need around 1.5 kHz lower for RX.

First, it must be ensured that the automatic coil adjustment is deactivated.

To do this, turn on the detector normally and, when the work screen is displayed, press the Enter key. Here in the menu Autobalance must be set off (Bal_Coil off). Then switch off, wait a moment. Then switch on while holding down the Enter key, you come to the service menu.

In the service menu, you first look for the resonant frequency for TX (in the case of an attached TX coil and capacitor in series) with the + or - key.

The current is probably still small, 14 mA are ok.

Resonant frequency is present when the current reaches the maximum. Then press Enter, the frequency will be saved (Save)

The current value should be at 50-130 mA. For Tesoro coils it is probably the smaller value as the higher resistance of the TX coil limits the current. Even with 40 mA the detector works.

Save current value again with Enter.

In the same way, the resonant frequency for the RX resonant circuit can be found (capacitor necessarily in series with the TX output). The current is much smaller here, because the resistance of the RX coil is greater.

The resonant frequency for TX should be about 1500-1800Hz higher than RX. This is important for good stability and smoothness.

Then move the cursor further to B_C, a small voltage value is displayed, the smaller this value is, the better the coil will work (zero balance).

Now the phase setting of the coil is determined. Place a piece of ferrite in the middle of the coil, a bar appears and a voltage value is displayed. The piece of ferrites back and forth a bit, so the voltage value is 2 - 4.00 V. Then press Enter and a second bar will run in the lower display to the same value as the upper bar. When the phase adjustment is completed, it is automatically confirmed with Save.

The setting Bat_ shows the voltage value of the battery, which is adjusted at the corresponding potentiometer with the actual supply voltage.

Use the + and - keys to set the lower operating voltage to approx. 5 - 6V. If this value is undershot, a warning signal is output in search mode.

Then turn off the detector, wait a moment.

Then switch it on normally and press the Up button briefly to get to the setting for ground balance. It appears in the first line Gr.B_ and next to it a value. Now move the piece of ferrite up and down at a distance of about 10 cm over the bobbin. The arrows on the display indicate the direction in which you have to change the value with the + and - button Conductance, which must be about 93 - 95 and instead of the arrows 3 boxes are displayed. If you then press Enter for a long time, the value next to Gr.B_ will change to 00. This gives you an initial value for the later comparison via real ground, which you can shift to + and -, because the detector should be in the Pump Pinpointer mode if possible have no change in the sound signal. So you switch over real ground between ground balance and controls the settings in Pinpointer mode.

Now go back to the work screen and 1 € coin (parallel to the coil pivoted) should give a single signal, at a distance of 10-30 cm.

If the coin gives a double signal, set the Bal_Coil to on and repeat the ground balance. Then set Bal_Coil off again and repeat the panning of the coin.

If the signal is still double, the connection of the RX coil must be exchanged. Then the complete adjustment process must be repeated. So phase adjustment and ground balance.

I hope this helps..

Fred

[ramses4040]

hello precious craftsmen looking fortune m3 hex file. can you help me teacher

[kt315]

do not ask me in PM. i do not have. HEX is a keks. somebody does HEX for free, at begining, then he offers new release but
for non-free.
collect a money to pay. economize on ciggarrettes. at least that's good for your health.

[Suvabard]

Hi Fred,

Thanks so much for putting this post together . I'll have a chance to go through the procedure later next week and will post the results to the thread.

Suvabard

Sorry for my very long delay, but i was busy with other doings.
Did you solved the problem? If not, please follow this procedure.
...

[blobber]

Hi Fred,

Thanks so much for putting this post together . I'll have a chance to go through the procedure later next week and will post the results to the thread.

Suvabard

You're welcome.

[blobber]

Again after a while with doing other things, a pcb is completed.

https://youtu.be/xJH0tVIH4YQ

[blobber]

Some pictures as well..

[Suvabard]

A very very belated update (due to some real world complications that took me away from the hobby). Using your post I was able to get it working perfectly. Thank you once again, you've been a real help!

Hi Fred,

Thanks so much for putting this post together . I'll have a chance to go through the procedure later next week and will post the results to the thread.

Suvabard

[Sando_ pretorii]

are there any more?