IDX-PRO+VDI

[Koala]

I built the IDX and it preformed brilliantly on the bench. And is really good on field with very few targets in them.

Here in the UK we are mainly looking for very thin coins. Not much thicker than thick paper. These are often cracked, cut in half or quarter. Put one of these on its edge in the ground. It will be almost undetectectable without turning the discrimination right down. Now you will pick up every forged nail that bent at 90, horseshoes and so on. Throw in the fact the pinpointer isn't true static means you can't eliminate targets by shape and size.

I didn't make the two tones mod. But even as a single tone, in quality headphones there's quite a lot of feedback. Sharpness, loudness and length can be learnt. Use to play a game of guess what the target is before its dug. For example deep large copper coins give a nice quite rounded tone.


Loved it sound and the youtube fetched some back nice memory's.

[chuubaba]

I connected 7.80mH inductors on Tx and Rx for test purpose. Also connected point 1C with 2C and oT with 2T Now it is giving very crisp melodious tone if i press the PP button else everything is dead silent. Still can;t figure out the true connections between points oT and 1T and 2T

Does this mean a correct circuit and i should proceed with building the coil for this IDX?

[SWL]

BC517 is connected incorrectly
[ATTACH]49889[/ATTACH]

Everything is right there. Bc517 has two options pinout collector and emitter pins......

[chuubaba]

Thank you Gaby_Sult. But here I have used MPSA13.

BC517 is connected incorrectly
[ATTACH]49889[/ATTACH]

[gaby_sult]

On this 2tone idx the two tone thing is incorporated in main board. Dont know what are these oT 1T 2T C1 C1. I hope someone will explain.
i have rebuilt the board but there is no tone (pots and coils not connected yet).
This project lacking proper build instructions in one document especially the coil building and board testing. Would be kind if specific document is available.

BC517 is connected incorrectly

[chuubaba]

On this 2tone idx the two tone thing is incorporated in main board. Dont know what are these oT 1T 2T C1 C1. I hope someone will explain.
i have rebuilt the board but there is no tone (pots and coils not connected yet).
This project lacking proper build instructions in one document especially the coil building and board testing. Would be kind if specific document is available.

[gurdal]

Hello to everyone;

Ferrite erase should start in which numbers scala on the pots of while adjusting the Idx PRO grount balance pot?
Is there a video explanation about this?


How should I proceed for better depth in the concentric coil?

https://youtu.be/1P88MiqHl0s

[MartyJ1963]

Thanks guys,,,,What I meant was I wanted to incorporate the 'Audio 2 Tones' pcb into the 'WhitesIDX' pcb as a whole unit,,sorry if I confused everyone. It's the 2 pcb's that Waltr posted earlier,,,Thanks again. Regards, Marty

[dbanner]

And finally, this schematic shows a 2-tone mod incorporated into the whole circuit.

[waltr]

thanks Dbanner. I added those schematics and links to my IDX files.

[dbanner]

[SWL]

Do not make 2 tones - useless prefix. The device will look like a music box (((

[dbanner]

I found this 2 tones mod board layout from an earlier post in this thread. It looks suspiciously like the board in the apparent 3-tones video I posted above.
Maybe I'll have a good read through the entire thread, or perhaps browse through the attachments list as well. There's plenty of info in this thread.

[dbanner]

Here is a 2-tone mod schematic:https://www.geotech1.com/forums/show...one#post191394

Another:https://www.geotech1.com/forums/show...one#post200224

[dbanner]

The video says "IDX 2 tones", but I hear 3 tones! At the end of the video you see a glimpse of the add on board, which by my eyes contains two chips, an 8-pin chip and another chip which looks to be a 14-pin job.

https://www.youtube.com/watch?v=xIA2Ee7nfrw

Here is another video:
https://www.youtube.com/watch?v=lyg_Di3kcvU

And another:
https://youtu.be/3q8EeLJC17Q