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Offline dr.jare
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« Reply #10 on: May 20, 2011, 01:43:41 pm »
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Yes, and I am interested in coil inductance and resistance.

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Offline jaber.nouri
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« Reply #11 on: May 21, 2011, 11:05:44 am »
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US4348639 (TF900 Detector) pdf- 1

Posted on: May 21, 2011, 11:04:10 AM
US4348639 (TF900 Detector) pdf- 2

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« Last Edit: May 25, 2011, 12:20:28 pm by Eugene52 »
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Offline dr.jare
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« Reply #12 on: May 21, 2011, 01:29:22 pm »
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jaber.nouri, anything to do with these patents with the main theme? This is a TR locator.

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Offline fffTopic starter
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« Reply #13 on: May 25, 2011, 01:02:55 am »
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coils
  wire 1 mm2

15 cm diameter - 24 turns
20 cm diameter - 20 turns
1x1 meter square-12 turns

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Offline Eugene52
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« Reply #14 on: May 25, 2011, 12:15:12 pm »
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Quote:Posted by fff
coils
  wire 1 mm2

15 cm diameter - 24 turns
20 cm diameter - 20 turns
1x1 meter square-12 turns


Thank-You Sascho and everyone for your work here on our Forum and this topic !!!

Looks like 18 awg guage and copper enamel see fuzzy page 2 ?

Best Regards.............Eugene

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Offline dr.jare
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« Reply #15 on: May 25, 2011, 12:32:31 pm »
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fff thanks for your reply (coil=0.2mH).Tell me some information detection (for example, 20mm coin with coil 20cm) and whether it is sensitive to small nonferrous objects? Eugene your pdf document can not be opened. Wire is 1mm= 1.15mm=17AWG 

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« Reply #16 on: May 28, 2011, 10:44:01 am »
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I found the answer to my question: "Detection range-coil diameter 150 mm-20 mm diameter silver 24 cm
Loop 1 in 1 m-box cока-cola 1 m."     

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http://www.thunting.com/smf/pi_designs_deepseekers/sbgpi-t20701.10.html
  This is an excellent detection.                                                                                                           

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Offline dr.jare
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« Reply #17 on: June 03, 2011, 01:28:40 pm »
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Quote:Posted by fff
If you built this detector, please write what you like and what not.
Hi fff. I have one question: that perhaps should not be a crystal of 32Mhz instead of 32kHz? Perhaps the mistake is on the scheme? Crystal of 32kHz can not find, other than small for installation in hour.

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« Reply #18 on: June 03, 2011, 07:24:49 pm »
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bulgarian pi by sascho. 20x20cm metal at 1mtr air test coil 1x1 mtr=1mm 12turns.

with schematic and pcb.

ram,

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« Reply #19 on: June 03, 2011, 07:43:14 pm »
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Quote:Posted by ram
bulgarian pi by sascho. 20x20cm metal at 1mtr air test coil 1x1 mtr=1mm 12turns.

with schematic and pcb.

ram,


We are all very Glad to see you back on the Forum RAM !!!  Thank-you for posting the PI schematics and PCB file !!

Best Regards Always............Eugene

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« Last Edit: June 03, 2011, 07:45:49 pm by Eugene52 »
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