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Offline numisNGSTopic starter
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« on: May 11, 2017, 11:54:45 am »
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hello
I have a question about vl770 transmit coil I read that it is made 40turns with 0.5 wire and where i see the schematic I saw a track in the medal od the coil ' it means that I wind 20 turns then I remove some of the resine and soldet a waire then I continue winding the  other 20 turns  or it's all 40 turns and the wire match the shielding
best regards

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« Reply #1 on: May 11, 2017, 01:15:06 pm »
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 The whole project can be found in the Zip. 

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Offline numisNGSTopic starter
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« Reply #2 on: May 11, 2017, 01:48:07 pm »
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I get it and read it but the construction of the coil is clear.I lost my mind when I saw the schmatic I put a mark on it where exactelly I don't understand how to make it
best regards my friend

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« Reply #3 on: May 16, 2017, 11:17:12 am »
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Hi friend , I was studyng the coil schemes and both coils  are mid-point or two superimposed coils and one is connected and the other is not . 20 + 20 turns .
Remember to do proper shielding and leave 5mm gap open .
Sorri for my bad English .
Greetings .

Posted on: May 16, 2017, 11:10:57 am
:)On page 112 you have a semicircle to wind up.
Or what you do not know is to make shield ?

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« Reply #4 on: May 17, 2017, 11:05:23 am »
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hello
I don't understand one connected and the other not connected how?
best regards

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« Reply #5 on: May 17, 2017, 11:26:49 am »
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 Rx coil is connected at three points.  Both ends and center tap.

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« Reply #6 on: May 17, 2017, 11:29:01 am »
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I understand now thank you very much

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« Reply #7 on: June 05, 2017, 09:21:01 am »
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hello home fire can you tell me about the configiration of VLF 770 coil .
1-inductance of TX and RX coils
2-dimensions and shape of the coil
3- the frequency I know that is 9khz for the transmit coil but the RX I don't know its frequency.
please if you don't know make a researche for me and tell me please .
thank you very much
best regards

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« Reply #8 on: June 05, 2017, 09:29:49 am »
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  I don't have any Specifications.  You may find it in the down load section I posted. 

Posted on: June 05, 2017, 09:26:03 am
  Just had a look at the Zip in Down loads.  Seems to hold all details. 

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« Reply #9 on: June 06, 2017, 09:22:53 am »
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I read alldetails .they say thatr vlf 770 has a coil  of 23 cm diameter .
and when I looked at the figure of coil construction I fid these dimensions/100 mm and 190 mm. and the design it self not a complete Dand  can't form circular coil.
you can chek these photos.
please help me !!!!!!!!.
best regards

Posted on: June 06, 2017, 09:20:40 am
the first page isn't clear but it says that the diaeter of vlf 770 coil is 23 cm I don't know if this coil is the commecial coil and the other is made by amator constructor Huh?Huh?Huh?Huh??

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