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Offline nikan1389Topic starter
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« on: August 22, 2010, 12:13:41 am »
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Heathkit Groundtrack GR-1290 VLF metal detector :

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http://www.hobby-hour.com/electronics/s/groundtrack-gr1290.php


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Offline knutdi
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« Reply #1 on: July 11, 2011, 11:34:43 am »
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Thank you nikan, i will made this.

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« Reply #2 on: April 17, 2014, 11:53:27 am »
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سلام من اين مدار رو ساختم اما دا خلي  شماتيك پي سي بي كه گذاشتيد مشكلي وجود داره داخل q3  & q5حتما برسي كنيد و خبرش را به من هم بدهيد
 در مورد كاليبره كردن ان هم به من كمك كنيد ببينم ايا  نياز به كاليبره هست يا نه
در مورد ساخت لوپ ان هم  كمك كنيد از چه سيم بيد استفاده شو با چه قطري 09357116117 من مهدي از ايران هستم

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Offline nickel_n
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« Reply #3 on: April 17, 2014, 02:13:41 pm »
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Quote:Posted by mehdi1199
سلام من اين مدار رو ساختم اما دا خلي  شماتيك پي سي بي كه گذاشتيد مشكلي وجود داره داخل q3  & q5حتما برسي كنيد و خبرش را به من هم بدهيد
 در مورد كاليبره كردن ان هم به من كمك كنيد ببينم ايا  نياز به كاليبره هست يا نه
در مورد ساخت لوپ ان هم  كمك كنيد از چه سيم بيد استفاده شو با چه قطري 09357116117 من مهدي از ايران هستم

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Offline mehdi1199
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« Reply #4 on: March 08, 2015, 08:16:18 am »
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Hi, I've made this circuit (volf 1290), but few problems I need to calibrate the circuit?
2.2 and 3.3 micro farad capacitor with three of the circuit is not in my other amounts
I used
Currently, this circuit does not work properly for me. And more than 35 cm does not detect anything
After the separation of metals does not Kiss Cry Cry Cry

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