The clone of SUPERSCAN MK II

[sirbedevir]

thanks for everybody

[sirbedevir]

minipulse?

[samii]

http://www.geotech1.com/forums/forum...Minipulse-Plus

[sirbedevir]

Hello!
What do you think: what is giving larger deep sensitivity for helmet size targets:
with two coil, 10×10 m big and 0.5m little
or
one 2×2m coil?

[g.s]

perhaps this is a good pcb .I want your opinion.

will present a comprehensive,When finished TESTING.

[sirbedevir]

Very nice, like a factory PCB...

[sirbedevir]

Hello!
I see the schematic of Superscan, but I don't understand how can flow bigger current in the coil then an usual 12V machine, because the Superscan has a 2.2Ohm resistor inline the FET? 24V/2Ohm coil+ 2 Ohm resistor = 6 A max. At a usual 12v PI machine can make the same. How Superscan can detect deeper? I don't understand...

[kt315]

ITMD is good book to read. if you need understand...

[sirbedevir]

My english not enough good read a whole book

[kt315]

mine too... its bad we both are idiots in english (

[pigeon]

perhaps this is a good pcb .I want your opinion.

will present a comprehensive,When finished TESTING.[ATTACH]36257[/ATTACH]

NICE.

[g.s]

with several several little things.
It is like asking amount watered a plant ???
1) be more specific
2) what targets searching
3) by separating the mono for ferrous
4) in search of the sea mountain
?????????????????????

Hello!
I see the schematic of Superscan, but I don't understand how can flow bigger current in the coil then an usual 12V machine, because the Superscan has a 2.2Ohm resistor inline the FET? 24V/2Ohm coil+ 2 Ohm resistor = 6 A max. At a usual 12v PI machine can make the same. How Superscan can detect deeper? I don't understand...

[kt315]

Hello!
I see the schematic of Superscan, but I don't understand how can flow bigger current in the coil then an usual 12V machine, because the Superscan has a 2.2Ohm resistor inline the FET? 24V/2Ohm coil+ 2 Ohm resistor = 6 A max. At a usual 12v PI machine can make the same. How Superscan can detect deeper? I don't understand...

you operate by impulse loading while you have to look on the delta pulse - flyback pulse current after mosfet turned out.
can you put your schema of Superscan? i have some schs but maybe your is better.

[waltr]

Hello!
I see the schematic of Superscan, but I don't understand how can flow bigger current in the coil then an usual 12V machine, because the Superscan has a 2.2Ohm resistor inline the FET? 24V/2Ohm coil+ 2 Ohm resistor = 6 A max. At a usual 12v PI machine can make the same. How Superscan can detect deeper? I don't understand...

It is NOT just the coil current but the coil TAU.
For a 390uH coil:
Tau = L/R = 390uH/6 Ohm = 65usec
390uH/2 Ohm = 195usec
These are the times required to reach 63% of Peak current. 5 x Tau time is needed to reach near maximum current.
https://en.wikipedia.org/wiki/RL_circuit

With lower Voltage and lower Resistance the TX ON pulse must be longer to reach the same coil current. This then limits the maximum Pulse rate (PPS).

In addition, what is to TC's of the integrator stage and what is the PPS rate???
Both of these factors play a big part in the detector's sensitivity and depth.

[sirbedevir]

Thanks, i understand it. The 2.2ohm is out of the 3300 micro capacitors circuit.... The 2.2ohr resistor is for charge the capacitor.