Delta Pulse

[Geo]

Coil 25 cm

Hi Ivconic.I tested the coil 25 cm with 37 turns 0.5mm . Also i chahged the frequency at 370 Hz and dumper resistor at 1k1 (a resistor 2k2 paralel with the first dumper). No special differences. Stability is very good at first 30min. After half hour the IRF is heats a litle (at full power) and the detector comes unstable. It detects a soda can at 70 cm and a 1 litre paint can at 85 cm a coin 2EURO (25mm) at 28 cm and an old 100dr (30mm) at 35 mm.

[pml]

Hi Geo,

a coin 2EURO (25mm) at 28 cm

Actually that's pretty good and up there with the Minelab GP.

Paul

[diminute]

Replace

In the DP i can replace the 4538 ICs by the 4528 ????


Thank

diminute

[eroll]

ABOUT delta pulse schema

I built delta pulse . But it is not working properly.
ı saw that there are 2 schema about delta pulse one of them there are connections cd4538' s 8. and 16. legs -V +V but one of schema not showing connection to this legs which shema is true?


Geo or onebody answer this I will be glad.

one more thing VD12 and VD13 connection ways different because connection of R s place changed new model pcb by kt315.
I dont know it is important or not

[Satel]

I built Delta Pulse by chematic, where leg no.3 is +V and leg no.13 -V (453.It works.

[Satel]

Sorry, legs 3, 13, and 16 +V, 8 is -v
Sorry,

[ivconic]

Another...


Many regards to you Geo! I am very busy these days, that's why i am here so rare....We'll talk much more later..
The Delta Pulse .pcb and schematic KT315 posted here are just right! 100%
I made one before some time and it is working fine. Yesterday i finished another Delta Pulse, this time with no changes at all, and it is working too, maybe even better than first one....I am so glad. Later i am gonna post here more about it....
regards

[Geo]

Sorry, legs 3, 13, and 16 +V, 8 is -v
Sorry,

hi eroll
Satel has right
leg 3.13 and 16 +E
Leg 8 and leg 1 at -E (be careful not at gnd)
good luck

[Geo]

This time i am building a square coil 60 x 60 cm. When i will finish it i will send the results.

[ivconic]

Nice...


Water pipes !!!! I made one simillar, but 30x30cm....
It is working good. I put 30 windings in it,0.4mm....
Good Geo !!!

[Geo]

Water pipes !!!! I made one simillar, but 30x30cm....
It is working good. I put 30 windings in it,0.4mm....
Good Geo !!!

Hi. How you inserted the wire? I will cut the upper side of pipe and i will insert the wire. After it i will close the cut with thermo silicone. I will try with 2 winds. 28..30 turns for 100 hz and 12 turns for 400 hz. I will send photo.

[pml]

Using pipes is very interesting idea. The only thing I have in question is heat dissipation _if_ they are plastic, pvc. If they're metal then ignore this post. I believe plastic is a poor conductor of heat. So I'm just wondering how much heat the pipes can dissipate. Perhaps it will be enough, but I think the wires will be noticeably hotter than normal. As you know, heat increase wire resistance.

my 0.02
Paul

[Geo]

Using pipes is very interesting idea. The only thing I have in question is heat dissipation _if_ they are plastic, pvc. If they're metal then ignore this post. I believe plastic is a poor conductor of heat. So I'm just wondering how much heat the pipes can dissipate. Perhaps it will be enough, but I think the wires will be noticeably hotter than normal. As you know, heat increase wire resistance.

my 0.02
Paul

Good question. I did not think it by no means. The pipes are plastic and I do not know how much heat it can dissipation. In any case the increase of resistance will not be big for a increase of temperature of inductor at 20..30 degrees of Celsius. The experiment will show if exists problem.

Regards

[detectoman]

your coil is for magnetism or is resistence for heat eggs? hups

jajajaja you coil nedd refrigeration, some radials how the heads of motorcycles, you is employ big demasiado power of bateries ????mjmujm detectoman

[ivconic]

No problem...


I cut my pipes same as you planing..Only way to do it!
Don't worry about heat, no heat at all....There is 2.5 Amps current in my
coil and no heat after 30minutes....at least no noticeable changes!
I filled pipes with "pur penn" mass...
regards