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Offline bernte_oneTopic starter
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« Reply #10 on: November 05, 2014, 12:13:37 pm »
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first acceptable results with 27cm dd coil 

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Offline xavier
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« Reply #11 on: November 06, 2014, 03:51:38 pm »
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That's look rather good mate, you'll have to let me know what the coil and cap set-up that you used.

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Offline bernte_oneTopic starter
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« Reply #12 on: November 07, 2014, 12:25:02 am »
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good morning

just look in the video commentary Wink

Coil is TX 0,4mm 1mH 330nf, RX 0,25mm 12mH 22nf
Calculated Frequency of 8,7kHz. Null voltage 9mV possible lower with more sens

i can make absolute nullvoltage, but final setup is 3-4mv

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« Last Edit: November 07, 2014, 12:27:47 am by bernte_one »
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« Reply #13 on: November 07, 2014, 05:36:53 am »
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OK now I see the difference, I will make a coil like yours, I can't get the 0,25mm so I will just have to make do with 0,20mm wire. I guess that it's just about time to post this as a complete and working project then mate, well done. 

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« Reply #14 on: November 24, 2014, 03:25:41 am »
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at Moment i am on work to adaptd the geotech vdi modul to the Admiral
just have to search for the best Connection Points for x and y Signal

i use a double sided layout which fits perfect behind a 1602lcd

also another test with 32cm coil
but i have big Problems indoor

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the concrete floor and the Roof construction influence the Performance of that 32cm coil
wit 27cm coil i got better target Audio but the Overall depth is lower than 32cm

but i think outdoor, and adjusted far away from all metal the 32cm will work very good

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« Last Edit: November 24, 2014, 03:30:14 am by bernte_one »
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« Reply #15 on: November 26, 2014, 12:41:32 am »
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I found that I have three problems testing detectors indoors, one is the floor that is made from reinforced concrete, then there is the electrical system and lastly are all the TV sets that are on and cell phones all round me. My solution to the problem is to go to the forest with my tools and do all my testing there, a bit of a pain but the results are so great that it's well worth it.

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Offline geodog2014
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« Reply #16 on: December 19, 2014, 03:43:47 am »
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Interesting project. Is it complete or ongoing? I noticed in the videos no faraday shield around the coils. Does that affect performance/depth?
By the way, has anyone built Overton/Moorlands Raptor? Looks like an interesting future project.

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« Reply #17 on: December 22, 2014, 05:57:32 am »
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sorry for late reply, my News info mail Option is not right configured

coil is indoor tested and unshielded, for outdoor and real use in soil i think is enough to shield the RX part
if you will 100% shure shield it complete

Admiral is still going on
on german detektorforum.de (Partner-site from thunting)
we are working on Admiral 3 Version with newer Version of geotech vdi
not fully tested, it is end of the year and the Family needs our time too

i think you will hear some News on the first weeks of 2015
if all are regenarated from silvester party

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« Reply #18 on: December 22, 2014, 06:59:12 am »
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Thanks. I should have paid attention to the title of the video...First test with unshielded coil....dooohhh!  Shocked Understand the family needs. Holidays are on us and things get hectic. Have a merry christmas and new year. And thanks from geodog.

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« Reply #19 on: March 23, 2015, 03:13:12 am »
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time to continue

will assemble the power supply and fill the coil with epoxi for field test this week

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