Detecting in South Africa

gambol1

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	Re: Detecting in South Africa « Reply #2310 on: April 13, 2012, 01:13:01 pm »

I like the idea of putting the mule in the back so you don't have to look at his ass. Grin

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Pgill

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	Re: Detecting in South Africa « Reply #2311 on: April 13, 2012, 01:43:17 pm »

Gambol, X would know about the back end of a cow, so mayb we can make a cow mobile Grin

X, the reason the coil is in that configuration is because the one side has to be twice the length on the hypotenuse and divided into the triangle, so that the ends can be 3 times the size of the left terminal of the capacitor, if you don't have that configuration, you will not get depth Idea

hope that helps you Great

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xavier

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	Re: Detecting in South Africa « Reply #2312 on: April 13, 2012, 02:56:13 pm »

F$%W% speak Chinese I might just understand whet the hell you're on about (But sound good any way) Grin

OK well got a bunch of stuff from the net and found out the the reason why have twice as many turns on the RX coil is that it acts as a transformer. Any way off to bed will build a new coil in the morning (Still don't know what happens to my LC circuit Undecided

Ha what the hell if it works LOL

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Pgill

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	Re: Detecting in South Africa « Reply #2313 on: April 13, 2012, 03:14:44 pm »

That is exactly what I said Clapp

You must just listen to me Wise

Make sure you do a good job of that coil, I do not want to see rubbish No no!

why no photo's of the box Angry

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GoldDigger1950

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	Re: Detecting in South Africa « Reply #2314 on: April 13, 2012, 06:42:23 pm »

	Quote:	Posted by xavier
OK well got a bunch of stuff from the net and found out the the reason why have twice as many turns on the RX coil is that it acts as a transformer. Any way off to bed will build a new coil in the morning (Still don't know what happens to my LC circuit Undecided Ha what the hell if it works LOL

Increasing the coil turns increases the length of the receiver antenna. Don't forget, a coil is nothing more than a long antenna wound in a circle. You can decrease the wire size and maintain the inductance. Plug in the formulas and see. The TX coil is fewer windings because that uses less power thus saving the batteries when you put forward that pulse of energy. As always, you will have more fun experimenting than succeeding at first go.

Keep well, old buddy.

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	Re: Detecting in South Africa « Reply #2315 on: April 13, 2012, 10:34:28 pm »

	Quote:	Posted by homefire
$30.00 of gas GONE in just three trips to town. What ta ell? New Project here. Mule Mobile

That's exactly what you need, Homie. I am sure a few carrots and a bag of oats are cheaper than gas , Grin

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xavier

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	Re: Detecting in South Africa « Reply #2316 on: April 14, 2012, 04:37:27 am »

	Quote:	Posted by GoldDigger1950
Increasing the coil turns increases the length of the receiver antenna. Don't forget, a coil is nothing more than a long antenna wound in a circle. You can decrease the wire size and maintain the inductance. Plug in the formulas and see. The TX coil is fewer windings because that uses less power thus saving the batteries when you put forward that pulse of energy. As always, you will have more fun experimenting than succeeding at first go. Keep well, old buddy.

Thank you for responding O wise one Pray

but there is still one thing that gets me. If I use the same gauge wire (Most do) my inductance will go for a loop now what happens to the LC circuit? I mean I wont have the same resonant frequency now will I? According to my calculations if I use a 0.47uF capacitor and a coil measuring 210.52uH I will have a frequency of 16Khz this is all well on the TX side but now on the RX side I have a coil 1/2 the diameter of the TX and twice the turns, question is how does this work? surely the RX must match the TX or is it at a different harmonic to the TX? Also how would I decide on what gauge wire to use?

All the best to you my friend
Xavier

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Pgill

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	Re: Detecting in South Africa « Reply #2317 on: April 14, 2012, 06:26:25 am »

X, I have given you all the answers to your problem No no!

exactly what GD says and more.... why don't you listen Funny

Hi Karl, GD, nice to see you guys here Great

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gambol1

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	Re: Detecting in South Africa « Reply #2318 on: April 14, 2012, 06:46:40 am »

x - I suggest you measure the L after you wind both coils, If it doesn't work right adjust the C. Mr. obvious man here. Cheesy

Posted on: April 14, 2012, 06:45:11 AM

Pgill, How is your move coming? Got the house on the market yet?

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Pgill

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	Re: Detecting in South Africa « Reply #2319 on: April 14, 2012, 07:00:04 am »

Gambol, yes the house is now on sale Great

in fact the agents are trying to get hold of some guy who wants to buy a house cash, that would be great Welcome

as soon as the house money is in the account, then I can resign from work (30 days) and then be on the plane to the UK Clapp

X will be very happy to hear this news Funny

Hope you are doing well on that side of the sea?

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