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Offline carlrodTopic starter
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« on: March 18, 2009, 07:03:11 am »
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 Hello FRIENDS. MY PORTUGUES,and i made a reel(coil) 50x50cm,to my DEEPERS-7 (P.I),and works well,except,that does not work at maximum sensitivity:11,with normal frequency=600 hz. BUT in 1200 hz,already works wellin max.11.WHAT IS THE CAUSE? 2-TERMINAL COIL,CONECT,ELECTRONIC COMPONENT? WHAT?
 THANK-YOU
 CARLOS.

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Offline Christian
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« Reply #1 on: March 18, 2009, 07:09:50 am »
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Hello Carlos!

[wleocme] to our forum! I am sure eitehr Cornelius or Eugene will be able to help with your problem. I hope you will enjoy our forum.

Best wishes,

Christian

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Offline Eugene52
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« Reply #2 on: March 18, 2009, 12:42:43 pm »
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Hello Carlrod , Welcome to the Great Thunting.com forum !!!! You need to read the PDF article I posted here again especially page 4 , It has some good tips . Is your coil Sheided or not , that has an effect on the coils capacitance  ? That may solve one of your problems . The other problem might be your inductance is too high . I will try to find exact specs for a 50cm by 50 cm coil , which is 20 inch  by 20 inch . Thank-You for joining us and please read our cool "Tech Talk" area .

 Great................Regards..........Eugene52

 Remember , the specs of the new coil you made ,  must match the original coil that came with the Deepers 7 !!!!

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« Last Edit: March 18, 2009, 12:46:23 pm by Eugene52 »
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Offline carlrodTopic starter
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« Reply #3 on: March 19, 2009, 06:28:29 am »
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>SUMMARY AND COUNCIL OF A FRIEND for a 50x50 cm round coil (50 cm diameter), you need only 15 turns.
> It will have ca. 278 ?H inductivity. (16 turns will have 316 ?H). The
> wire core diameter should be 0.58 mm for 1.6 Ohm. The windings
> thickness should be 0.5 cm. You need ca. 24 m coil wire.
>>After all, the coil: 16 TURNS.,wire,AND, 2.6 Ohm. how to put the: 1.6 ohm? reduced, how many laps? less ohm, increases or decreases, the depth of detection? Detecting

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Offline Eugene52
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« Reply #4 on: March 19, 2009, 10:28:06 am »
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Hello Carlos , Basic "ohms law" applies to a search coil , the lower the coil resistance the higher the current flowing through the coil thus increasing your magnetic field around the coil . Try only 12 turns . But that may not help !!!! I think you are having other problems . The type of wire you are using is not correct , because the problem is occuring when you double your pps or frequency . Exactly what kind of wire are you using , copper enamel , magnet wire , or teflon coated ......If you your original search coil is 2.6 ohms , your new coil must be 2.6 ohms , no exceptions . Also is your coil shielded ? Just keep experimenting and you will succeed . Be carefull not to go to low in DC coil resistance and burn out your Deepers 7 "power mosfet transistor" . Best Regards......Eugene

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Offline carlrodTopic starter
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« Reply #5 on: March 20, 2009, 03:03:07 am »
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 tank you,EUGENE 52,FOR HELP MY.I his conselho.primeiro, I measure the coil original.a then I will get around the new reel, so it is with equal (ohm, s)
  if it is less, (ohm, s) can detect a little deeper? actually tested yesterday on the ground (sand) and works very well, until max.sensi: 11, but by precaus?o, then by going in as the original (OHM, s) not to damage the DEEP-7!  Wink Wink Wink

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Offline carlrodTopic starter
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« Reply #6 on: March 20, 2009, 09:40:30 am »
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good afternoon friends. measure, the coil, original (DEEPERS) = 2.2 OHM. : the coil: 50X50cm, is 2.6 ohm. this difference may damage the detector? may lose some depth, significant?  Detecting

CARLOS


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« Reply #7 on: March 20, 2009, 10:09:24 am »
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Quote:Posted by carlrod
good afternoon friends. measure, the coil, original (DEEPERS) = 2.2 OHM. : the coil: 50X50cm, is 2.6 ohm. this difference may damage the detector? may lose some depth, significant?  Detecting

CARLOS



Hello Carlos . Your 50cm by 50cm coil must be 2.2 ohms [dc resistance] . Try 12 turns tightly wound and then measure again with an accurate digital ohm meter . Do not go below 2.2 ohms !!!! Please check back with us and let us know your progress .
Best Regards.............Eugene

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« Reply #8 on: March 20, 2009, 10:21:28 am »
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Hello again Carlos . I re-calculated your wire at 0.1375 ohms per turn , so try 14 turns and you should be close to 2.2 ohms . 12 turns is not enough ............14 should be close to perfect  Shocked........ Great........Eugene52

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« Reply #9 on: March 24, 2009, 03:05:42 am »
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friend,s.tirei of 3 turns of wire, and was with: 2.4 ohm. measure  coil original:(1x1m) and has: 2.3 ohm. the original coil, (40x20cm) is: 2.2 ohm. I further modified nada.o do you think? 0.2 ohm will not reduce, + 5 cm depth of detection?  Detecting


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