IGSL

[ivconic]

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.

Sheesh! You not suppose to have 14.5kHz with Musk coil at all, who told you that?
As i recall 8.3 to 8.7kHz was the frequency at my diys.
It's been a while... i haven't done nothing similar as IGSL for quite some time, that's why i don't take a part in these discussions here, simply because i forgot so many things about it.
But one thing i think i remember good; my IGSL was working good in range 8.3 to 8.7 kHz at the time.

[seadoggy]

Sheesh! You not suppose to have 14.5kHz with Musk coil at all, who told you that?
As i recall 8.3 to 8.7kHz was the frequency at my diys.
It's been a while... i haven't done nothing similar as IGSL for quite some time, that's why i don't take a part in these discussions here, simply because i forgot so many things about it.
But one thing i think i remember good; my IGSL was working good in range 8.3 to 8.7 kHz at the time.

Ok thx Ivica and Davor,i dont know where i see 14.5kHz ,i make new coil now running at 8,5 kHz,where to find E cores?? is that in small (transformators)?

[Davor]

Yes, those are small ferrite cores like these: http://i.ebayimg.com/images/g/ViAAAO...zLR/s-l300.jpg
They work quite well.
It is good to have at hand a piece of alu-foil lightly jammed into a ball for adjusting discrimination.

[seadoggy]

I make new coil again and i think i almost reject ferrite rod!!,but i am not really sure is it good well.
here is video of new results.

Coil still not shielded.

[seadoggy]

Second test now with shield.

i think it is much better.

[ivconic]

Good progress, bravo!
But... you have to use proper shielded cable from coil to pcb, NOT simple wires.
Anyway, you almost there.
Cheers!

[seadoggy]

Good progress, bravo!
But... you have to use proper shielded cable from coil to pcb, NOT simple wires.
Anyway, you almost there.
Cheers!

Thanks Ivica .what is best cable to use??,can you attach pic here,or link

[Koala]

I use van damme microphone cable 4 core. Nice and flexible unlikely to break.

Looks like ferrite would be rejected if it was smaller.

[seadoggy]

I use van damme microphone cable 4 core. Nice and flexible unlikely to break.

Looks like ferrite would be rejected if it was smaller.

ok i must try search that cable on ebay.thx for info.

I will post here new video of my IGSL i think it is good now he dont respond at ferrite just little but i think that is good.

Final test IGSL(ferrite rod)

[Koala]

ok i must try search that cable on ebay.thx for info.

I will post here new video of my IGSL i think it is good now he dont respond at ferrite just little but i think that is good.

Final test IGSL(ferrite rod)

Looks very good to me.


Shield makes or breaks the coil when you use the coil in the field. I had to make a second coil before I got it right. First tested okay. Went on a rally and the dew on the grass made the coil almost unusable until the sun dry the grass a bit. Second coil I used Don Bower method of keeping the shield separate from the TX and RX ground in the head worked fine and is very stable. Don't known the cause for sure but if you can test over wet grass before you seal the coil up would be a good idea.

[seadoggy]

Looks very good to me.


Shield makes or breaks the coil when you use the coil in the field. I had to make a second coil before I got it right. First tested okay. Went on a rally and the dew on the grass made the coil almost unusable until the sun dry the grass a bit. Second coil I used Don Bower method of keeping the shield separate from the TX and RX ground in the head worked fine and is very stable. Don't known the cause for sure but if you can test over wet grass before you seal the coil up would be a good idea.

I dont know how you think shield separate from TX and RX!?you think TX/RX shield go with wire separate to ground at PCB??

[ivconic]

I posted sketch (picture) somewhere ... most probably on this thread or Tesoro Golde Sabre thread, of cable which suits nice for my coils.
Can't find it right now.
It is making the difference of how you will connect coils, shield and cable. Better to perform tests and check several options before you close your coil and apply filler.
Cable must have nice and rich shield, usually litz wire net.
Use cable with 3 separate pvc coated leads (preferably litz too) and all those in common shield finally all coated in pvc or silicone.
That's actually common cable, simple ordinary, usually met at most of coils today.
Second option (not bad too) is cable with two separate coaxial put in common coating (XP coils are using such cable).
...
Usually i connect cable and than later i perform coil nulling. A assume you will have to re-balance your coils a bit after add proper cable.
According to your videos i am sure you already made good coil, now you only have to finish it properly.
Cheers!

[ivconic]

Here it is one of the options from the past;

[bernte_one]

one choice was belden 2738 cable (2 twisted pair with one shield)
other choice can be dual s-Video cable These are two coax lines and one additionel shield line
or you take some simple microphone cable with at least 5 lines inside

but best choice could be a dual coax for sattelite or tv Installation
but not the stiff choice but with rubber
the tx and rx side is separated side by side and each pair with good shield
lorenz in Germany use such a Kind for their rx/tx pi coil - it can´t be wrong

http://www.nuggets.at/bilder/produkt...-SuchSpule.jpg

[Koala]

Here it is one of the options from the past;

[ATTACH]34801[/ATTACH]

That's the one I used on my original coil which worked fine except over wet grass. Must work as its the same as Tesoro use. The one that worked for me was to directly connect the four TX and RX to the four wires in the cable and shield to the shield of the cable at the coil end. Suspect its something to do with the epoxy and coil shell material and cable combination used. Original brown Tesoro coils are made out of a conductive plastic.