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Offline salemTopic starter
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« on: March 24, 2018, 01:59:58 pm »
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Hello all friends
I needed a search coil to be 20 ____________25 centimeters
detector Pulse induction
Resistance  3_____3.5
400_____600 uh
 

How to make it
How many turns
And what are the size of the copper wire

thanks


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« Reply #1 on: March 24, 2018, 02:49:11 pm »
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   Welcome Back.  Here is some ball park numbers for you.

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Diameter and parameters of PI coil1.pdf
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« Last Edit: March 24, 2018, 02:55:52 pm by Homefire »
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« Reply #2 on: March 24, 2018, 03:06:11 pm »
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Thanks my dear
But i need resitor 3 to3.5
What  i do?
turns more
Thanks

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Offline GoldDigger1950
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« Reply #3 on: March 24, 2018, 05:08:03 pm »
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You are not actually looking for a resistance, that would be futile. You are looking for a REACTANCE of 3 to 3.5 ohms. Many people make that mistake. Make your coile to match the inductance and then calculate your impedence which will give you your reactance based on the frequency.

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