Hobby Hybrid MD1

[Ivont]

The transistor Q16 is controlled from ALL channel. When some target is detected, this transistor enables the work of the final stage of the DISCRIMINATION channel to show the type of the target - Fe/non-Fe. For Fe target, The "Fe" LED lights up first and after that "non-Fe" LED lights. For non-Fe target this order is reverse.

Why does discrimination use a later signal? Is the discrimination block swapped with the right channel?

[Ivont]

Sorry, I understand now. This sample is being removed.

[dbanner]

A bifilar coil where the Tx and Rx coil are co-located(hence bifilar). How can we null such a coil, or do we even have to? See, you can have a DD bifilar, so you have an inductively balanced arrangement in which each half contains a co-located Tx and Rx coil. When the Tx is on(on both sides), both Rx coils can be made to cancel each other(post signal processing) because they are balanced in the DD arrangement. Fancy pancy switching could make this work or not.
A beautiful symmetry is what the scientists always look out for. Surely this one can't be useless.

It is not a bad thing just to throw ideas out there, maybe one will stick.

[Ivont]

Sorry, what is this about? That's another topic.

[Ivont]

Hi Karl! Is discrimination possible with a bifilar wound coil not with DD? In progress on..

What do you mean by bifilar? The bifilar coil will not accept any signal.What do you mean by bifilar? The bifilar coil will not receive any signal. No transmission, no reception.
It's a completely different story if you mean percentages.

[Orbit]

https://youtube.com/shorts/kpxFxxHMR...mKHR-7LafUyFKq. I mean this I wound bifilar with 3 to 4 turns of 1 inch and one start and end is connected to rx the other is connected to tx, on tx and rx must be the same damping, I experimented a little last winter with this coil tx width 100us and frequency 700hz. Like I said I didn't have too much time but it turned out that something made sense.?!!!?It should be noted that it is important where you listen during the transmission pulse, i.e. it is necessary to place the sample in a certain place during tx for the iron, there I still have the task of adjusting CH 1 and CH 2 to the SAT speed.You can see in the video that for the coin the swing needs to be slowed down and for the iron a bit of a fast swing above the coil, this is because SAT CH 1 and SAT CH 2 were not aligned.

[Detectorist#1]

Hi Orbit,
Your impressions at this stage are very raw. Calm and write new refreshed information what happened with this solution.

[Orbit]

Hi Orbit,
Your impressions at this stage are very raw. Calm and write new refreshed information what happened with this solution.

It's very simple, as I said, it's waiting for its time.. Vladimir... Otherwise, the video is real, it's not lasered like the big producers usually do. This really works! I am completely calm, the recording is from a few months ago, I had other jobs, I do not sell detectors like Mikron, etc... I work for my own needs. I don't know too much, but the blind hen also stings the grain.

[Detectorist#1]

Hi Orbit,
It is will be very good if your idea (and results) will gives some new results in TX-ON analysis of RX signals. The information for TX-ON analysis of Rx signals in PI detectors in ITMD3 book is not big, it is time for us to do more experiments in this area.