Another dumb question..but you guys are used to them

[Davor]

I see. So you are already deep into it. You already realised how good this concept works for resolution of small targets without losing the depth.
So how about the idea of a 4 quadrant Rx to harness all the goodies that a real differential coil can offer?

BTW, linking to the md4u forum without offering a few more hints is ... demanding. I can understand ~90% Russian, although I didn't learn it for real, but not slang, and I lose too much time in reminding that Gc stands for Hz etc. Google translate is of little help because it stops translating at the middle of the page, and it often misses the phrase. Please put a few words about the link you are referring to so that we can manage them with less confusion. A few quotes and a diagram would be perfect.
Thanks.

[Tinkerer]

>RX coil above the center of the 2 TX
RX is located on the equipotential surface of the TX
>in-phase will give more depth
the best =>

A single large coil will give more depth.
However, for FE discrimination we have a problem with very thin rusty FE targets. These targets show the R response stronger when presented flat or horizontal to the coil.

When presented vertical to the coil, the X response is stronger and the FE is better differentiated.

With the TANDEM COIL, the magnetic field vectors hit the horizontal target at an angle that enhances the X signal and therefore differentiates the FE target better.

A similar thing happens with coins in the vertical position. The signal response is very weak.

With the magnetic field vectors at an angle, these targets give a stronger signal response.

Talking about PI detectors.

Tinkerer

[Davor]

Aziz, is it possible for your fine software to do vector multiplication? I believe it would be very revealing to see in phase multiplied with antiphase as vectors.
Thanks.