Schematics for Eric's Aquapulse and Superscan detectors available?

[Thomas Weissbach]

Dear all,
since Eric Foster hast left us some time ago, i am trying to find someone who has the Schematics of the Superscan and Aquapulse detectors available.
I am interested in how he managed to make these two detectors so powerful.
It would be interesting to see how these circuits were made.
Thanks a lot from Switzerland
Thomas

[GeoMax]

Hi Thomas,

If you search Geotech, you will find the Superscan schematic. The Aquapulse is actually the same as the MiniPulse, which you also can also find here in the forum. Both detectors have a longer TX pulse compare to other detectors. Thats why they are so powerful.

[kt315]

you may seek Aquapulse 1B pics of board in the Archive. i got them on request to one. a schematic is absent.
Superscan is oldie matter and all in the forum. pic superskan by erik foster orginal kopija2.jpg tells me that the sch was draw by Eric, but i do not sure know.

https://drive.google.com/file/d/1P4a...usp=drive_link

The settings for the Superscan are as follows -

TX pulse width 500uS

TX pulse frequency 86 pulses per second.

Sample pulse delay 60 - 150uS, adjusted by reject control.

Delay for second sample pulse 1100uS

Sample pulse widths 45uS.

The coil inductance should be 500uH for TX and RX, with a TX resistance of 1.5 ohms, including the cable.

Because of the low pulse rate and wide spacing between 1st and 2nd sample pulses, the unit can be affected by low frequency rf signals and power line noise. The MK2 version has a TX frequency control that can often counteract this. Also the integrator TC is adjustable (response speed) - slower smooths out the noise more.

For best signal on any object, the TX pulse width should be about the same as the decay time of the object signal. A large copper pan could have a decay time considerably longer than 500uS and not give as good a range as a similar size object of less conductive metal.

Ground signals from iron mineralised ground will be strong with a single TX/RX coil, but the Superscan was also designed to use separate TX and RX coils. An outer TX with and inner RX of half the diameter will give much less ground response. Also you can lay a big 10m x 10m TX coil on the ground, and search within it with a 0.5 or 1m RX.

Eric.

[Thomas Weissbach]

thanks a lot

Greetings
Thomas

[Masry]

تحياتي لك

[Qiaozhi]

تحياتي لك

Please make your posts in English.

Basic Rules of the Forums

[nasios]

someone have working pcb of superscan?

[nasios]

you may seek Aquapulse 1B pics of board in the Archive. i got them on request to one. a schematic is absent.
Superscan is oldie matter and all in the forum. pic superskan by erik foster orginal kopija2.jpg tells me that the sch was draw by Eric, but i do not sure know.

https://drive.google.com/file/d/1P4a...usp=drive_link

The settings for the Superscan are as follows -

TX pulse width 500uS

TX pulse frequency 86 pulses per second.

Sample pulse delay 60 - 150uS, adjusted by reject control.

Delay for second sample pulse 1100uS

Sample pulse widths 45uS.

The coil inductance should be 500uH for TX and RX, with a TX resistance of 1.5 ohms, including the cable.

Because of the low pulse rate and wide spacing between 1st and 2nd sample pulses, the unit can be affected by low frequency rf signals and power line noise. The MK2 version has a TX frequency control that can often counteract this. Also the integrator TC is adjustable (response speed) - slower smooths out the noise more.

For best signal on any object, the TX pulse width should be about the same as the decay time of the object signal. A large copper pan could have a decay time considerably longer than 500uS and not give as good a range as a similar size object of less conductive metal.

Ground signals from iron mineralised ground will be strong with a single TX/RX coil, but the Superscan was also designed to use separate TX and RX coils. An outer TX with and inner RX of half the diameter will give much less ground response. Also you can lay a big 10m x 10m TX coil on the ground, and search within it with a 0.5 or 1m RX.

Eric.

Hello you have and working pcb?