my first russian pirate pi

[gando]

I need an help for my Metal detector, is a pirate russian pi.(from ebay K157UD2 board with 2 trimmer)
it find a coin at 3-4 “ ( 5-7cm)
i use a 9 volt battery rechargeable (8.2-8.4Volt)
the coil is 10 “(20cm) of 0.4 x 31 rounds - 432uH
cable from central unit to coil is 85cm 2x0,75mm
my problem is: i want to find a coin near 8-10 “ (16-20cm)
can you help me?
thanks in advance

[gando]

[gando]

[gando]

this is my pirate pi, my first test, but i don’t like the deep performance...

https://m.youtube.com/watch?v=znYEOhsk_Og

coil from coin is 2” -3” ( 4cm)

[kt315]

sorry but if you give small kalym for a girl you get only ugly curve one. you get a detector for its money. now you are ready to do follow one.

[Eddy71]

Fast test of "Pirate-Pi"

https://www.youtube.com/watch?v=rAfvLlVnlrA

[nonkapo]

this is my pirate pi, my first test, but i don’t like the deep performance...

https://m.youtube.com/watch?v=znYEOhsk_Og

coil from coin is 2” -3” ( 4cm)

In the video post by Eddy, author state that when using 9volt battery the performance is worse, so my first advise to you is to try 12 volts. Second advise is to build different diameter and parameters coils. Good luck.

[gando]

sorry but if you give small kalym for a girl you get only ugly curve one. you get a detector for its money. now you are ready to do follow one.

i don’t understand...

[gando]

Fast test of "Pirate-Pi"

https://www.youtube.com/watch?v=rAfvLlVnlrA

this coil is fantastic! it’s home made?

[gando]

In the video post by Eddy, author state that when using 9volt battery the performance is worse, so my first advise to you is to try 12 volts. Second advise is to build different diameter and parameters coils. Good luck.

i will try 12 volt battery or 9 volt batteriy with DC DC step up to 12 volt.
for the coil, have you experience or can you suggest different build but simple?

[Eddy71]

Coil 27 turns 27AWG wire around 180mm tube

[dbanner]

Another thing to consider is adjustable damping to experiment with various coils. I spent considerable time on this Russian pirate pi, never got more than six inches or so on coins.
Good for pinpointer for Beach sand.
Build something more complex like bara or surf, don't waste your time for 10 inches from this circuit, you'll never get it.

[kt315]

i don’t understand...

ДЕШЕВАЯ РЫБКА - ПЛОХАЯ ЮШКА. from cheap fishes you will not do good soup.

[gando]

Another thing to consider is adjustable damping to experiment with various coils. I spent considerable time on this Russian pirate pi, never got more than six inches or so on coins.
Good for pinpointer for Beach sand.
Build something more complex like bara or surf, don't waste your time for 10 inches from this circuit, you'll never get it.

thanks a lot for your think and your experience.
next build will a surf pi kit.
i want a pulse induction metal detector for sometime on wet sand...

[gando]

ДЕШЕВАЯ РЫБКА - ПЛОХАЯ ЮШКА. from cheap fishes you will not do good soup.

all ok!
can you advise me for a good kit to build?