IDX-PRO+VDI

[medj]

Thank you for your good location Fabian
I want to ask you manufactured the device or not
I made the device lacks something I did not know him
Reveals only a distance of 05 cm
I hope that you show me on pieces that control the power device
That I wanted to communicate with me in any way I'm ready
Or anyone else
There are many places went waiting for me
Thank you again for your response

[gtdavid]

Ok so the 39 ohm resistor did the trick thank you.
My fisher cz coil arrived today does any one have any connection or circuit tips or tricks to get the most out of these coils??
And if any one knew the pin outs for the fisher coil that would help heaps .
Thank you

[medj]

Is resistant r7
To 3.3 K neither less nor more
The sense that the device works, but weak
gtdavid

[gtdavid]

What do u mean medj..

[Fabian]

Thank you for your good location Fabian
I want to ask you manufactured the device or not
I made the device lacks something I did not know him
Reveals only a distance of 05 cm
I hope that you show me on pieces that control the power device
That I wanted to communicate with me in any way I'm ready
Or anyone else
There are many places went waiting for me
Thank you again for your response

Hello Medj. It is difficult to understand your post. Sometimes it's the same with mine, and it is because of the translators. Try to use neutral language, without idiomatic used in your region.
Regarding the IDX, as Eduardo said many times, all published PCB work well. Mine, for example, did not work until I found that he had confused the value of one of the capacitors when I put it together. In most cases, they are construction errors or changed values.
Another issue are the coils. If you are testing with homemade coils, patience. Once one realizes which variables to consider, it is not difficult to achieve a good result, but you can. Patience.

Regards,

Fabian

[gtdavid]

Ok I have read the posts on page 3 again and for the fisher quicksilver coil they talk about using capacitors on the tx and rx are these caps placed in parallel at the board or are they a replacement fir preexisting pcb components? ?
I have the coil connected and I am detecting a pair of pliers at about 20 cm . I was expecting a bit better than that.
I also seem to have a fair bit if noise comming threw also I will post a video if it helps ..
Thanks

[golfnut]

mostly for these, the Tx cap is in the coil and Rx tank tune is on pcb.

If you have too much or too little Rx cap this will alter sens.

try a few different caps on Rx

S

[gtdavid]

This may sound stupid but witch one is the rx cap??

[satdaveuk]

The MPSA14 is the upgraded version of the MPSA13, better spec and gives a bit more punch to sound output , or should I say it does on the Minipulse 3 project.

[Koala]

The MPSA14 is the upgraded version of the MPSA13, better spec and gives a bit more punch to sound output , or should I say it does on the Minipulse 3 project.

Thanks will order one and try later.

[gtdavid]

Ok so I retested the tx ac and it is down to 8.63v ac with the cz coil..
Is there a way to boost this voltage?

[Koala]

Ok so I retested the tx ac and it is down to 8.63v ac with the cz coil..
Is there a way to boost this voltage?

Is that with a meter or a scope.
I measure 16V peak to peak with a scope but under 4V with a meter. There are two way a meter calulates AC true RMS and AC average rectified both a for true pure sinusoidal signal.
Here is a quote from a meter manufacture
"non-true RMS or AC rectified average multimeter may not be accurate to measure non pure sinusoidal waveform due to different hardware architecture being used to extract the signal,"

As for connecting your CZ a few people on here have successfully done it maybe a PM to one of them will point you in the right direction as some of the information is missing from this thread. If I see on come up secondhand at the right price I will try one and would also be interested in the correct connection.

[kycoin]

Make that another one interested in the correct details for CZ coil !

[gtdavid]

So far I have the cz connected and detecting a small ring at about 15-20 cm and a gold bracelet at about 20-25 cm .
I have put 33.3 n worth of caps on the rx (2*15n & 1*3.3n) I have seen a silght improvement .
I am thinking about boisting voltage on the tx line by hot wireing the tx ciruct direct to 12v as I have seen some one else do in this thread.
Thorghts?
Thanks.

[golfnut]

I would try your kit on the ground now as your off first base, get used to all of the controls on your soil types. Getting the ground bal set properly and lowering sens position to max sens to targets but keep geb falses to minimum.



If it still isnt what you want, then do a few tweaks.



I run my Tx from 12v direct, it gives a more punchy hit on small targets - more than depth improvements. I have two batteries in my IDX 12v and 8v with a toggle switch for 12v or 20v tx supply


Most Tx tweaks for me where only a small improvement - often the difference between a one way tone and a two way tone - in use in the ground - tested on my testbed.


The most useful gain sensitive tweaks are the Rx tank tuning as you are looking at. Dont have the Rx tank resonate too close to the Tx freq or it will false a lot over the ground.

Generally,,
#
lots of turns on Rx coil - more Rx volts
GEB fine tune regularly
keep sens and threshold set accordingly
dont have the disc set beyond iron cut off - or you will loose a fair bit of depth
try more than one set of cans - borrow some others and some give user better info
good sheilding on the coil helps with falsing on wet grass

S