IGSL

[Qiaozhi]

Can anyone explain why 2 box are never motion detectors?

Thanks in advance.

Andy

HI


AS TM808

The TM808 is not a motion detector. It is a non-motion detector with autotune.
There are two modes of operation, autotune and non-motion available. To start off, you walk briskly with autotone on. Once a target is detected, you then must switch to non-autotune mode.

The IGSL is a true motion detector, and responds too fast to be used as a 2-box.

[golfnut]

Hi Johnsmith,

In UK there are some coins like 2pence struck in steel with copper plating..

These coins (depending on your settings) give both tone simultaneous.


I always hear tone for ferrous, I cant tune it out.

Steve

[johnsmith77]

Hi Johnsmith,

In UK there are some coins like 2pence struck in steel with copper plating..

These coins (depending on your settings) give both tone simultaneous.


I always hear tone for ferrous, I cant tune it out.

Steve

I see. I checked even 1-2 pence; 1-2 euro cents have iron.
Can you tell does igsl gives middle tone for caps?

Or this method can be used?

http://www.youtube.com/watch?v=3epFYd-iv7c

[pigeon]

hi



there is need to do to change when the igsl to make it as tm808

best time

pigeon

[johnsmith77]

IGSL

[der_fisherman]

??

The IGSL is a true motion detector, and responds too fast to be used as a 2-box.

Please can you tell us why that is bad for a 2 Box as I for one, still don't understand it.....the 2 Box still needs to be moved......

Many thanks for any help and explanation.

Andy

[Qiaozhi]

Please can you tell us why that is bad for a 2 Box as I for one, still don't understand it.....the 2 Box still needs to be moved......

Many thanks for any help and explanation.

Andy

A 2-box is a more unwieldy instrument to swing around, than a standard metal detector. which is moved easily by relatively small movements of the arm.

Note that I did not say the IGSL could not be converted to a 2-box ... of course, it can. My point is ... would you want to use such a detector?

To be effective, a 2-box needs to be non-motion.

[der_fisherman]

IGSL as a 2 Box

A 2-box is a more unwieldy instrument to swing around, than a standard metal detector. which is moved easily by relatively small movements of the arm.

Note that I did not say the IGSL could not be converted to a 2-box ... of course, it can. My point is ... would you want to use such a detector?

To be effective, a 2-box needs to be non-motion.

So what you are saying is that the IGSL will need to be moved around probably much faster than its maybe practical for the size/length of a 2 Box.

Now I understand that much better.

Many thanks for staying with us and explaining it fully.

Andy

[bernte_one]

what is it?

Thats many hours and nights of work

btw: which capacitor value i can take for this excellerator2 coil
specs shown in picture

thanks ivconic (the one with the idea), silverdog (pcb kit and this nice little connector plug)
forum members (great support) and internet and fore sure my wife for sleeping alone

[bernte_one]

can i use this calculator?
http://deepfriedneon.com/tesla_frame6.html

[bernte_one]

ok i calculated something

for excelerator2 coil from detech (0,71mH and 0,38mH)

rx 0,71mH 300nf total of caps are 10,905kHz +1,2 = 12,105
to get 12,105kHz on tx
tx is 0,38mH plus total of caps 450nf reaches to 12,17kHz

this way ist ok or?

or should i calculate for tx 14kHz thats not so important true?


for tx 14,906kHz i need 300nf (100nf plus 200nf paralell) 14,906/1,2 12,42kHz
rx 12,42khz 230nF (12,454kHz)

sorry im noob on frequency terrain but step by step i know how it works (i think)

regards

[Qiaozhi]

ok i calculated something

for excelerator2 coil from detech (0,71mH and 0,38mH)

rx 0,71mH 300nf total of caps are 10,905kHz +1,2 = 12,105
to get 12,105kHz on tx
tx is 0,38mH plus total of caps 450nf reaches to 12,17kHz

this way ist ok or?

or should i calculate for tx 14kHz thats not so important true?


for tx 14,906kHz i need 300nf (100nf plus 200nf paralell) 14,906/1,2 12,42kHz
rx 12,42khz 230nF (12,454kHz)

sorry im noob on frequency terrain but step by step i know how it works (i think)

regards

Try using this formula:


where

[bernte_one]

hello Qiaozhi

thx but im not a scientist

C is capacitance? (Farad nanofarad?)
w is Frequency? (in HZ or kHz)

L i know but in mH or H

f is what?


can you explain formula please?

[Qiaozhi]

hello Qiaozhi

thx but im not a scientist

C is capacitance? (Farad nanofarad?)
w is Frequency? (in HZ or kHz)

L i know but in mH or H

f is what?


can you explain formula please?

The formula uses SI units:
C is capacitance in Farads
L is inductance in Henries
F is frequency in Hertz (cycles per second)
is angular frequency in radians per second.
= 3.14159

For example:
If L = 0.71mH and F=14kHz, then





Hence, C = 182nF

[bernte_one]

thx Qiaozhi

peoples like you help me to learn something
my old formula book from physics in german gymnasium (engl. college)
was to far away and off my brain
in shool times 12years ago i could calculate such thinks

but think w=2*pi*f - 2*3,14159*14000=87964,594300514210676954014731826

c =1
----------------------------------------------------------------------
87964,594300514210676954014731826²*0,0071 (Henry)

result 1,8202282200764905763847273499879e-7

0,00000018202282200764905763847273499879 Farad

Nanofarad
182,02