IGSL

[Koala]

I'm sorry for going in offtopic, can u post lay file for your Bandido?

All info here original project was on md4u.ru forum.

[CDI]

All info here original project was on md4u.ru forum.

Many thank's...

[seadoggy]

Can i use wire 0.20 to make RX coil for IGSL??

[ivconic]

Can i use wire 0.20 to make RX coil for IGSL??

Yes of course.

[seadoggy]

Yes of course.

ok thx mate

[seadoggy]

Ivica when you turn IGSL with out coil,do you get any sound on speaker??

this is my igsl

[ivconic]

Ivica when you turn IGSL with out coil,do you get any sound on speaker??

this is my igsl
[ATTACH]34747[/ATTACH]

No.

[seadoggy]

hello do IGSL must reject ferrite rod??,
my IGSL board working good,but i dont know do must reject ferrite rod when i balance coil.

[CDI]

hello do IGSL must reject ferrite rod??,
my IGSL board working good,but i dont know do must reject ferrite rod when i balance coil.

Not completely reject ferrite rod, but some crack u must got near 5 cm from coil, try also hot rock, must be complete rejected, if not, u will got into instability at mineralised soil.

[seadoggy]

Not completely reject ferrite rod, but some crack u must got near 5 cm from coil, try also hot rock, must be complete rejected, if not, u will got into instability at mineralised soil.

I cant balance coil to remove ferrite!
My TX is 1mh-(4.5 ohm)
RX-15 mh-(wire 0.20 have 77 ohm)

[Koala]

I cant balance coil to remove ferrite!
My TX is 1mh-(4.5 ohm)
RX-15 mh-(wire 0.20 have 77 ohm)

Not all ferrite is made equal. I find a small bit long wave Arial fine but some of the hard emi filters don't reject fully. Also you can have problems if is in a doughnut shape.

If you are almost rejecting but running out of adjustment on the ground balance POT I would suspect the phase on the coils is too far out. RX and TX normally have very similar inductance for these detectors.

[seadoggy]

Not all ferrite is made equal. I find a small bit long wave Arial fine but some of the hard emi filters don't reject fully. Also you can have problems if is in a doughnut shape.

If you are almost rejecting but running out of adjustment on the ground balance POT I would suspect the phase on the coils is too far out. RX and TX normally have very similar inductance for these detectors.

Thx for replay mate.
I think my coil is not good(27 cmm coil),i try make new coil i then null coil i see on youtube they can reject ferrit with musketeer coil.
I try all night to reject ferrite,but it is mission impossible i have nice deep about 28-30 cmm small gold ring.also i did not shield my coils now i will make new one put shield and then see what will happen.

[Koala]

Thx for replay mate.
I think my coil is not good(27 cmm coil),i try make new coil i then null coil i see on youtube they can reject ferrit with musketeer coil.
I try all night to reject ferrite,but it is mission impossible i have nice deep about 28-30 cmm small gold ring.also i did not shield my coils now i will make new one put shield and then see what will happen.

If you have a way of measuring frequency follow Don Bowers 101 instructions.

"my favorite method is just attach the coil to your completed circuit board (J1) and measure the running frequency. The Tx should run at 14.5 kHz.
Next, half of the form must be removed and the wire must be constrained. I use simple dental floss. Note: If wire is wound on a two sided form tightly, very little change in inductance will occur once constrained. At most, it should increase by only .1 mH.
Build your Rx coil in the same manner, except for the number of turns. Also, to check your Rx coil, you can attach it to your completed circuit as well, but attach your Rx coil to J1 (the Tx circuit). Since this is 6.5mH, the oscillator should now run at 13.95 kHz. Again, this is just a quick check and will then be removed! "

[seadoggy]

If you have a way of measuring frequency follow Don Bowers 101 instructions.

"my favorite method is just attach the coil to your completed circuit board (J1) and measure the running frequency. The Tx should run at 14.5 kHz.
Next, half of the form must be removed and the wire must be constrained. I use simple dental floss. Note: If wire is wound on a two sided form tightly, very little change in inductance will occur once constrained. At most, it should increase by only .1 mH.
Build your Rx coil in the same manner, except for the number of turns. Also, to check your Rx coil, you can attach it to your completed circuit as well, but attach your Rx coil to J1 (the Tx circuit). Since this is 6.5mH, the oscillator should now run at 13.95 kHz. Again, this is just a quick check and will then be removed! "

I just measure the running frequency at TX coil i get 9.08 kHz!!,i think it is TX coil problem because i dont have 14.5 kHZ on TX coil and that why i cant remove ferrit rod.

[Davor]

Your coil is Musketeer style, and most probably your IGSL is as well. So 9kHz is OK as well. There might be a problem with Rx resonance being too close if the Rx coil capacitor is too big. Also if you built it strictly according to the original plan, you have 2 channels to adjust ferrite reject. Also please note that some ferrite rods are slightly conductive, and their response is not exactly where it should be. I'm using a small bag with a bunch of square-ish ferrite E-cores for that reason.

Now that your device is nearly done, you may wish to seek a pin swap mod that fixes the ferrous channel offset.