TGSL-Mini 100x70mm

[bernte_one]

i have made some coil calculations for alternativ coil

original is TX 6mH 22nf 4,38kHz
RX 6,5mH 14,7nf 5,149kHz Relation 4,38 / 5,149 is nearly 1,2 (5,28kHz would be ideal)

replacement

TX 2mH 680nf 4,316kHz
RX 14mH 68nf 5,158kHz

less Resistance in TX - more power, and better inductance relation in RX results in stronger Signal

or did i calculate wrong?

[BKY1337]

Sounds interesting. Do you think i could use a coil from a tesoro cibola with a tgsl with this modification?

[waltr]

i have made some coil calculations for alternativ coil

original is TX 6mH 22nf 4,38kHz
RX 6,5mH 14,7nf 5,149kHz Relation 4,38 / 5,149 is nearly 1,2 (5,28kHz would be ideal)

replacement

TX 2mH 680nf 4,316kHz
RX 14mH 68nf 5,158kHz

less Resistance in TX - more power, and better inductance relation in RX results in stronger Signal

or did i calculate wrong?

The frequency of the Originals does not calculate from the L & C given.

The replacement values do however.

https://en.wikipedia.org/wiki/LC_circuit

[blobber]

TX 6 mH 22 nF 13,853kHz
RX 6,5 mH 14,7 nF 16,262kHz

I used LC circuit app from Google Play Store

[bernte_one]

maybe my calculation are wrong, i used caculator from website

[bernte_one]

ok calculated something wrong before, had failure in browser
new calc
original
Tx 6mh 22nf 13,853 khz
Rx 6,5mh 14,7nf 16,28 khz
alternativ 1
Tx 1mh 136nf (2*68nf) 13,647 khz
Rx 14mh 6,8nf 16,312 khz
alternativ 2
Tx 1mh 150nf 12,995 khz
Rx 14mh 8nf (4,7+3,3nf) 15,039 khz
wetec.vrok.de/rechner
i think null voltage tuning of factory made coils can be achieved with additionel resistor values in series#
or by trimming the resistor on fet of TX driver

[BKY1337]

My parts arrived today and unfortunately the dimensions of the 4.7u caps are way to big (8.5 x 14 x 7.2mm).

Are there smaller 4.7u polyester capacitors?

[kt315]

take bipolars and close this matter

https://www.ebay.com/itm/10pcs-4-7uF...gAAOSwvg9XcySq

[kt315]

https://www.aliexpress.com/item/10pc...ceBeautifyAB=0

[kt315]

https://www.aliexpress.com/item/10pc...ceBeautifyAB=0

[BKY1337]

Thank you kt315! The 5mm ones will fit. But I think I gonna Drill new holes for my big ones at the test Board and Connect the Pins at the back.
I will buy them for the other Boards. I hope my 100k Potentiometer will arrive soon.

[waltr]

ok calculated something wrong before, had failure in browser
new calc
original
Tx 6mh 22nf 13,853 khz
Rx 6,5mh 14,7nf 16,28 khz

Now correct.

[bernte_one]

can someone say something about the coil alternatives i caculated

as i know the normal 6/6,5mh coil has not the best Transformer relation

q-Faktor of TX can be improoved with 1mH (less turns, thicker wire, less capacitance -> better q Factor)

[bernte_one]

i remind also the pickup board for tgsl which provides the minelab musketeer Oszillator
so that is is passible tu use factory made coil like ts800 or ts1000, but i had not tested them in past

[Hyena]

i remind also the pickup board for tgsl which provides the minelab musketeer Oszillator
so that is is passible tu use factory made coil like ts800 or ts1000, but i had not tested them in past

I made and tested both versions of IGSL (TGSL and Musk) and differencies was only sensational. No difference in depth, nor in disc... I used exactly the same former for both coils (13"). Both get 35cm for € in air and 30cm in light soil.

I do not remember if motivation of using different frontend was due to lack of interest in making own coils or to gain performance. Anyway you can use "musk" coils with modified Tx oscilator and another caps of Rx... thats all. otherwise devices are the same.