Delta Pulse

[Malospelos]

Good morning, thank you for your help and your answers.

In the end, after testing, I built a 12" coil and I'm happy with the result.

To protect the coil I have seen that aluminum is used, the shielding should not be completely closed if there are no problems, am I right or does it have no influence on a coil of these characteristics?

Is there anything to keep in mind before closing the coil and applying epoxy?

Thanks again, I'll upload photos of the coil.

[kt315]

while you do coil for DP you must think you can use the coil in future, on another type of detectors. with more short MAIN DELAY.
so you must do right from start FASTEST coil, not trash one for your garbage basket.
so i NEVER suggest to do coil with foil. i also do not SUGGEST applying epoxy. you have to do fat AIR jacket between the winding and epoxy.
how? take a rope, wind it around, after wind scotch tape, in two layer, against spilling of epoxy in the rope. you will get air gap in 3-4 mm.

[Malospelos]

It's okay, I understand.

I had thought about putting a helical cap on it.

And then it occurred to me not to fill the coil with epoxy, to solidify it completely and make a slot to insert the helical cable and seal it with thermal silicone.
The blue line is the cable with the helical sheath, this way I avoid filling the entire coil with epoxy and close the 4mm slot that the cable has with silicone.

The coil material is nylon.The coil is manufactured on a CNC machine in one piece with a slot for the cable.With a thickness of 10mm it has a weight without cable of 220 grams.

[Tanu]

Can someone tell me how to make big coil Housing?
50 cm round mono coil

[kt315]

Can someone tell me how to make big coil Housing?
50 cm round mono coil

in folder of the Archive HUGE COILS you will seek all kinds of the coils, digest.

[Tanu]

Thanks kt315
First I decided to make the coil housing using PVC but
I have a problem with the PVC coil housing. How do I put the coil in it?
Should the pvc pipe be divided into two parts?

[kt315]

have i use SEARCH engine every time you ask me? this forum has the info on 4 pieces of ITMD4 book's value.

WHITES DUAL FIELD COIL - Geotech Forums (geotech1.com)

[Alexismex]

Helo Jose , i used also this type of wire , it is very good, but i removed the pvc cable cover and i tape the cables every 15 cm with masking tape .... By removing it, you take off a lot of weight of the coil....half!!!

[kt315]

Изготовление катушки для импульсного металлоискателя своими руками - Мир искателей - все о металлоискателях (miriskateley.com)
this is in Russian but look the pics. sorry I can not give you links in English because I do not know resources.

Зачищаем провода соединяем и распаиваем согласно таблицы.

	Провода конца №1		Провода конца №2
			О	<─Вывод 2 обмотки
	О	<─соединяются─>	ОБ
	ОБ	<─соединяются─>	З
	З	<─соединяются─>	ЗБ
	ЗБ	<─соединяются─>	К
	К	<─соединяются─>	КБ
	КБ	<─соединяются─>	Г
	Г	<─соединяются─>	ГБ
Вывод 1 обмотки─>	ГБ

[Jose]

Helo Jose , i used also this type of wire , it is very good, but i removed the pvc cable cover and i tape the cables every 15 cm with masking tape .... By removing it, you take off a lot of weight of the coil....half!!!

It's a good idea, thank you. I would like to clarify for those who are thinking of making their coils with this type of cable, that there are poor quality brands and this is reflected in the resistance of the conductor, which is of high values, affecting the performance of the coil.

[kt315]

Olá, você não vende com os componentes? E eu faço as soldas?

hello amigos

for KIT, you mean, i have to buy new components somewhere. Lithuania is so tiny country you will not seek it at the global map never. does make nothing now. but in USSR did all. so you can buy the details in Chine like i buy too there. all my projects are oriented on very poor people and to second use of old electronics boards you can take from garbage boxes at streets and in shops. we call that 'TRASH TECHNOLOGY'.

Pleasure

Anatloy