Deus II: About the oscillogram

[Riss]

I might know why XP is using this waveform. A simple way to implement a SF detector using a digital TX drive is to just use a square wave, a la Fisher CZ. The current is then a triangle wave. At higher frequencies where inductive reactance dominates this works well. At low frequencies (maybe below 5-6kHz) the inductive reactance is dropping and coil resistance becomes a bigger factor. Instead of nice linear ramps the current waveform slopes become more exponential. The ohmic losses waste power.

Adding in some dead time (especially at the zero crossings) allows the use of faster slopes in the current ramping which improves efficiency. XP doesn't quite add 50% dead time but if it did it would make a 5kHz waveform have a similar efficiency of a 10kHz square wave. I suspect that they are channel-filtering the preamp signal and then doing a software IQ demod for traditional phase-domain results so all the weird artifacts go away.

No doubt - that's right. As the hunters say - with one bullet - two rabbits . Due to steeper current slopes , achieved with dead time - improved efficiency for targets with low time constants . At the same time increased energy efficiency- battery saving .

[Riss]

You stole that from the Mincecraft ...

notty notty!

At first glance it is very similar to this oscillogram
https://panther.ph/difference-betwee...wave-inverter/

[Marchel]

I found a similar video where they measure the X35 coil on an oscilloscope and there was already a rectangular signal in the X35 coils so the connection must be very similar to the new FMF coils.

https://www.youtube.com/watch?v=TyvD656l6i0&t=1231s

[Marchel]

Next video Deus ll https://www.youtube.com/watch?v=alNFtYUYPTA

[ivconic]

Next video Deus ll https://www.youtube.com/watch?v=alNFtYUYPTA

So, TX is bellow 1mH, that's what i see on those funny x-rays.

[Marchel]

The TX winding probably consists of several smaller windings, as in the older X35 coils. Here are some pictures of the disassembled coil and probably the pcb of the new FMF coil will probably look like that.

http://www.md4u.ru/viewtopic.php?f=94&t=9140&start=125
https://md-arena.com/razborka-katush...ichili-razmer/

http://piccy.info/view3/14074611/038...dc7cbd32/1200/
http://piccy.info/view3/14074609/b0e...00ad4172/1200/
http://piccy.info/view3/14074612/0fc...4491a830/1200/

[Carl-NC]

TX looks like Litz, I would expect both TX & RX to be ~500uH.

[ivconic]

TX looks like Litz, I would expect both TX & RX to be ~500uH.

Yeah... pretty close. Maybe RX is a bit higher.

[ionut_mtb]

I made some measurements on white HF coil 9”: tx 0.25ohm 118uH rx 24ohm 2.2-2.5mH (i have to check both my rlc meter and ohmmeter with real test equipment)

[ivconic]

I made some measurements on white HF coil 9?: tx 0.25ohm 118uH rx 24ohm 2.2-2.5mH (i have to check both my rlc meter and ohmmeter with real test equipment)

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Yes, that confirms our assumptions and logic so far.

[dbanner]

Nobody in the West can put deus11 videos but somebody from Russia?
Good video.

[Marchel]

I made some measurements on white HF coil 9”: tx 0.25ohm 118uH rx 24ohm 2.2-2.5mH (i have to check both my rlc meter and ohmmeter with real test equipment)

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Great job Please take a detailed photo of the PCB to compare between X35 and HF coil and try to calculate the number of turns of the coil and the thickness of the wire.

[ionut_mtb]

this is what i found on my hard drive, sorry for the quallity

[Marchel]

this is what i found on my hard drive, sorry for the quallity

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Thanks for the photos they are fine. It's as I assumed between HF and X35 it doesn't seem to hit any difference in the PCB, the difference will only be in the firmware.

[Taktyk]

This is a continuation of the ada4841-2 preamp and AD7691- 18 bit SAR and PIC electronic circuit. Here direct samling for Deus.



Here is CNV signal initiates a conversion, selects the CS mode. Conversion Time: CNV Rising Edge to Data Available = 0.5 to 2.2uS.


But for multi there should be a multi channel converter. Unless we collect samples as in the ML Sovereign method.