IDX-PRO+VDI

[sdesic]

If you use the TGSL shape with the specs on page one of this thread the phase works out perfect

Tried loads of shielding methods so far best to date is a simple flat card covered in carbon above and below the coil seems that any creasing in the shield ruins it.

I will need to aquire new wire then.
Shielding for concentric coil is simpler ... what can be done for DD ?
I have small beeps on ends of swing - maybe shield and can be fact that I did not use resin to cover it.

[sdesic]

http://www.ebay.com/itm/Whites-Blue-Max-Deepscan-950-Coil-and-Detector-FREE-SHIPPING-/141370115956?pt=US_Metal_Detectors&hash=item20ea50c774

seller is not shipping to Bosnia bargain

[sdesic]

Best option is commercial coil - black max 950 pro or blue max 950 pro.

I am not happy with DIY coil as for bad shielding and heavy coil when potted with resin.
I used mylar foil on my TGSL DD coil.

If I buy stock coil it would be expensive - is it worth it ?

http://www.amazon.co.uk/Whites-24cm-Search-Blackmax-950/dp/B0032TCIF6

[Koala]

Hi guys,

is there a IDX PRO DD coil making manual like for TGSL ?
I constructed few TGSL coils on coil jig, so I can use same jig for IDX PRO ?

I would like to use 0,30 or 0,45 or 1 mm wire for coils.
How can I calculate No. of turns for DD coil ?

Schematics and PCB are not changed very much from first 30 pages ? Don't need VDI yet.
I read this thread ... 109 pages ... but still reading searching for good solution for shielding

If you use the TGSL shape with the specs on page one of this thread the phase works out perfect

Tried loads of shielding methods so far best to date is a simple flat card covered in carbon above and below the coil seems that any creasing in the shield ruins it.

[Silver Dollar]

Well the formula for 27DD is;

TX wire from 0.70mm 35 turns - 0.587 mH - 1 uF cap
RX wire from 0.15mm 270 turns - 35.6 mH - 33 nF cap

The goal is low resistance TX and high resistance RX so changing the
wire diameter will affect results somewhat but as long as you end up
with the proper inductance it will work (after a fashion) depth may be
lessened... To find out how many turns to make with a different diameter
you could try a calculator but I've never found one accurate enough for
my coils. I'd add 10% and check the value while on the winder (if possible).

[sdesic]

Hi guys,

is there a IDX PRO DD coil making manual like for TGSL ?
I constructed few TGSL coils on coil jig, so I can use same jig for IDX PRO ?

I would like to use 0,30 or 0,45 or 1 mm wire for coils.
How can I calculate No. of turns for DD coil ?

Schematics and PCB are not changed very much from first 30 pages ? Don't need VDI yet.
I read this thread ... 109 pages ... but still reading searching for good solution for shielding

[paku]

Well the problem is around U5 though it is always in the circuit.
Check the outputs at pin 1 and 7 of U5 and see if there is an offset
there...

This Is Solution For My Problem Thanks For Hint Silver Dollar

Best Regards Paku

[paku]

i just check my battery out put is 11V
when i turn idx on
i put multimeter on battery + and - the voltage drop to 7v then it slowly up to 10.8v the beep is gone when voltage get to 10.8v.
i have remove all ic sockets but some time i still get long beep when i turn it on, and not stop

[Koala]

what is problem on idx when turn on just get long beep sound then the transistor MPSA13 is going hot
when turn it on disc mod it working like normal when put on PP mod it will be long beep and MPSA 13 is hot

MPSA13 should be cold something is wrong

You are not the first to get a hot MPSA13 last time turn out to be a solder bridge causing a short.

[paku]

Ok Thanks

Silver Dollar


at U5 i get 2.81v pin 1 and pin 7

Regards Paku

[Silver Dollar]

Well the problem is around U5 though it is always in the circuit.
Check the outputs at pin 1 and 7 of U5 and see if there is an offset
there...

[paku]

what is problem on idx when turn on just get long beep sound then the transistor MPSA13 is going hot
when turn it on disc mod it working like normal when put on PP mod it will be long beep and MPSA 13 is hot

[Schatztaucher]

konan you can do a search......perhaps "concentric coil"....and you find this for example.....


IDX_Concentric_coil.pdf


regards

[konan]

Does anyone know the parameters for concentric colil ?

[Koala]

have you test it or that is just theory

Tested in the field with two people with two XP Deus running identical program and the same size coil one get a slight signal. Other goes over the same area and it does not register at all.

If your IC's are in sockets you can test it your self by swapping some out and maximizing your detector

On another forum (findmall) Monte was a Tesoro dealer. He use to test every detector. Out of every 10 detectors most would be the same 1 or 2 would run slightly lower and 1 or 2 would run hotter and that does not include the slight differences in coils.


Interestingly I have also tested my IDX with 8" coil on a iffy signal against a Deus with a 9" coil and that also gave an iffy signal.