IDX-PRO+VDI

[Koala]

greetings .. can someone answer me this ---- that voltage at osciloscipo gets on channel 1 and channel 2 to measure the rx and tx desface,,, for that position tx and rx voltage that position is puts in volts or mv thanks

Should be about

TX 16 volt
RX 200 mV

[ricalbertvig]

greetings .. can someone answer me this ---- that voltage at osciloscipo gets on channel 1 and channel 2 to measure the rx and tx desface,,, for that position tx and rx voltage that position is puts in volts or mv thanks

[jlsilicon]

Well you really should ask this in the Coil section. You need the inductance of the original coil you are replacing. Then a couple
of calculators will help you design a new one.

This will show you the cap for tuning; http://www.siversima.com/rf-calculat...FfB3cAodsAgAzg

Download this coil calculator to get the number of windings needed for your target inductance; http://www.geotech1.com/forums/showt...oil-Calculator

The reason that I am asking, is because I want to try the Figure-8 Coil with my MD.
I want to use the TX as an Oval with a Folded RX Coil as a Figure-8 inside it,
or the RX as a skinny Loop with the TX as a Folded Figure-8 over the RX Coil.

This results with a ZERO Voltage base input on the Receive Loop, to the Circuitry.
With, a fluctuation input of Pos or Neg (around ZERO V) depending upon the Target.
So, the OpAmp Input needs no Adjustable/Floating offset to Compare to.

Should this make the MD easier/less to Tune ... no drift - yes ?

[Silver Dollar]

Does anybody have the calculations and Coils and Inductance and Caps - for creating a 6in or 7in DD Coil ?

Well you really should ask this in the Coil section. You need the inductance of the original coil you are replacing. Then a couple
of calculators will help you design a new one.

This will show you the cap for tuning; http://www.siversima.com/rf-calculat...FfB3cAodsAgAzg

Download this coil calculator to get the number of windings needed for your target inductance; http://www.geotech1.com/forums/showt...oil-Calculator

[jlsilicon]

Does anybody have the calculations and Coils and Inductance and Caps - for creating a 6in or 7in DD Coil ?

[Koala]

Are you saying that - all I need is a RESISTOR added - to use the BlueMax 256 with my IDX Pro Board as a Detector ??

I use a 6B old Classic coil on my home made IDX. Found that the ground balance was out of range so added just enough to fetch it in range. Can't remeber the value but it is in this tread somewhere. The Disc is slightly out and at its lowest setting will still reject small iron.

It is very usable stable coil

Never tried a BlueMax 256 but as its also used on 6B machines I would expect the same result.

[jlsilicon]

Are you saying that - all I need is a RESISTOR added - to use the BlueMax 256 with my IDX Pro Board as a Detector ??

[salih]

I have a problem in my IDX-PRO+VDI The cursor in the screen does not move, but in nearby can move, Lacks sensitivity ( VDI ) I need Tips

[Koala]

It's made for a different detector so disc and ground balance will be out. I use a 6B coil on my IDX and had to add a resistor for the ground balance to work

[jlsilicon]

Whats the problem with the BlueMax 256 ?

[Koala]

Is it workable to use the BlueMax Concentric Coil, instead of the BlueMax D Coil ?

Yes all bluemax are interchangeable and work properly on the IDX except for the "Blue Max 256"

http://forums.whiteselectronics.com/showthread.php?48965-Older-Whites-Coils-and-Blue-Max-Coils

[Silver Dollar]

I believe any BlueMax coil will work.

[jlsilicon]

Is it workable to use the BlueMax Concentric Coil, instead of the BlueMax D Coil ?

[zoomix]

Hello there,

I am mechanical designer and as they say, "to each his profession"

Could you tell me if there is a way to increase the reactivity of VDI?

The 2 amps are mounted input integrator with the + terminal on a divider bridge 2.5volts. Is that the integrator or subtraction?

The problems of input output menu bug is probably in the fact that the microcontroller pin up !! The push buttons of a microcontroller, in mounting this active low, must be connected to ground with a 10k.

I replied with a mounting Lf347 and changed cap0.470 by 1μ with 10k in series. The feedback resistor against at 470k. This circuit responds to 30cm but gives errors of values.

I need exactly this arrangement identified but I have my doubts ... intégrateur- or subtraction / differential?

Is it possible to have better results with an amp instrumentation?
Especially since I saw some identical VDi has yielded results greater than distance..et entry VDI lugateck is the same assembly.

thanks

[onuba]

my LF347 pin 7 Pin 8 does not send signal to VDI, and currency discriminates near the coil. LF347 what happen

ociloscopio I have no. way he is not bad LF347.