TGSL coil

[waleed]

I have made TGSL-EDU metal detector,but i only have problem with the coil, so i decided to buy a stock coil from us amazon, i just want someone to tell me which coil will do good on tgsl, and give me a link for it, thank you

[rajesh]

I have made TGSL-EDU metal detector,but i only have problem with the coil, so i decided to buy a stock coil from us amazon, i just want someone to tell me which coil will do good on tgsl, and give me a link for it, thank you

Homemade coil building is very easy, then why do you want to ask for it from US Amazon , Is your detector not catching the 25 mm diameter nickel metal from 12 inches away?

[waleed]

Homemade coil building is very easy, then why do you want to ask for it from US Amazon , Is your detector not catching the 25 mm diameter nickel metal from 12 inches away?

I only can buy from us amazon because of my country, and no it can't detect that coin at 12" deep, i got boring making the coil several times, i just want to buy a stock coil that would work just fine.

[rajesh]

I only can buy from us amazon because of my country, and no it can't detect that coin at 12" deep, i got boring making the coil several times, i just want to buy a stock coil that would work just fine.

When you place an order from an International Seller on Amazon.in, you must provide KYC - proof of identity (ID).
This is mandatory for customers importing items . Please note that ID of the order recipient is required for KYC. then custom's can Enquiry to authorized person to use it

[waleed]

When you place an order from an International Seller on Amazon.in, you must provide KYC - proof of identity (ID).
This is mandatory for customers importing items . Please note that ID of the order recipient is required for KYC. then custom's can Enquiry to authorized person to use it

I don't have any problem buying from Amazon.us, leave this all for now and let focus on the main topic; "is there a coil that i can buy would work fine with tgsl?".

[waleed]

I forgot to mention, when i move the SENS knob nothing happened,i mean shouldn't it start to chattering when i increase the sensitivity?

[rajesh]

I forgot to mention, when i move the SENS knob nothing happened,i mean shouldn't it start to chattering when i increase the sensitivity?

If you increase your R 36 maximum then there is a slight change here i mean milli volt which does not increase sensitivity.081 or 071 instead of 308 will make noise

[waltr]

I forgot to mention, when i move the SENS knob nothing happened,i mean shouldn't it start to chattering when i increase the sensitivity?

This is typical with a stock TGSL. If you do the -8V mod on the sensitivity control then it will chatter with control at about half way.

[waleed]

Okit seems the potentiometer was broken i changed it, now everything seems work fine but the depth is low i can't detect a coin at 20 cm in air, i tested RX freq on tx tank and it was 13.97 khz and TX about 14.7 khz is that good?

[surfdetector]

Okit seems the potentiometer was broken i changed it, now everything seems work fine but the depth is low i can't detect a coin at 20 cm in air, i tested RX freq on tx tank and it was 13.97 khz and TX about 14.7 khz is that good?

For the TGSL your coil should be about;
TX 14.5 KHZ and 6.0 mH
RX 16.1 KHZ and 6.5mH

[waleed]

For the TGSL your coil should be about;
TX 14.5 KHZ and 6.0 mH
RX 16.1 KHZ and 6.5mH

Man i know that really, check again what did i post; i said that i tested them on the tx oscillator so for RX freq which was 13.97 khz is pretty good because if you would put it on the 15nF Cap it will be 16khz, but for TX freq it was 14.7khz instead of 14.5khz, i dont know if 0.2khz would make different?

[rajesh]

[waleed]

[ATTACH]56142[/ATTACH]

What this is for??, why the 18v?

[rajesh]

What this is for??, why the 18v?

entire 18 volt +9 volts & - 9 volts where -5 volts is - 9 volts

[waleed]

entire 18 volt +9 volts & - 9 volts where -5 volts is - 9 volts

Oki, but what happen when i do that?