SUPER D COIL

[Nandor]

Looking good, must be a hard work!

Best regards

[6666]

Hi
roughly metal detection beautiful.
I do the reset and fine-tune the test in the following days[ATTACH]49234[/ATTACH]
Yours truly

Nice

[sayan1345]

Omega and Super D

Omega and Super D Sensors for IB Detectors

[Gwil]

Hi sayan1345 - Thanks for posting those pdfs, very interesting.

[Ozoz_xba]

I have made this super D coil to test on tgsl ,yes it can detect everything about but the depth dont go much.30x30cm coil diameter and 40x40 cm coil diameter had the same depth 22cm in air for 1 euro.instead of those i made another coil 27cm DOUBLE TUNED which has the same performance as super d, 22cm for 1 euro.

[EL NINO]

The range of the 30cm Super D coil will also depend on the detector performance ,.... AKA Signum ..and 30.5cm SuperD coil on [15kHz]....

[Searchy]

Am i right with my assumptions concerning the advantages of a DOD coil arrangement in conjunction with CCPI:

* Short to no TX to RX delay time for low TC targets like gold since TX and RX coils are separated and CCPI is used
* Higher sensitivity through higher inductivity RX coils, higher TX magnetic stregth through optimized TX coil
* Higher EMI immunity through two RX coils connected 180 degree out of phase
* EFE and ground effect immunity

I assume that the two receiving D coils have to be arranged in a way that the TX pulses ar not seen by any of both.
That way, receiver sensitivity can be maximized.
However, what i do not understand is how the devices manage to cope with TX pulses directly received by the RX coils due to targets changing magnetic fields.
This "direct" feedback should be way higher than the target's decay voltage?
My guess would be that due to the short, defined CCPI pulse, the pulse is masked out and thus is not saturating the RX-amplifiers?
However, the RX coils may again need to be dampened to avoid resonance?