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Measurement from Bounty hunter 3300 8" CCoil.
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Nice. Thanks. -
The 3300 coil is the same as the Fisher F2 coil, and other BH models:
http://www.geotech1.com/forums/showt...her-F2-F4-coil
http://www.geotech1.com/forums/showt...Discovery-3300
http://www.geotech1.com/forums/showt...er-4-inch-coilComment
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good home work and the report. thank you.Comment
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The 3300 coil is the same as the Fisher F2 coil, and other BH models - all those are of first texas products, not so amazing if they change the labels
not touching the content.Comment
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My point being Mr. Akasyto is incorrect in his reverse engineering.
And yes, First Texas own BH, Discovery, Teknetics, Fisherlabs, possibly more.Comment
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skippy means you gave a false info. please give pics of the coil inside and argument that you are right he is not.Originally posted by akasyto View PostComment
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like this kt 315?
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I like it. Very niceOriginally posted by Orbit View Postlike this kt 315 [ATTACH]31377[/ATTACH] ?
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I made a DD coil for BH3300
Mold is from hard expanded polystirene
Rx - 6.33 Ohm L=2.39mH 87turns 0.35 wire
Tx - 6.58 + 2 Ohm L=2.6mH 70turns 0.35 wire
Shielded with graphit33 and drain wires
Sensitivity is 24cm for 1e coin in air original 8concentric is 19cm for 1e coin
Weight of coil is 540 gram.Comment
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2 more pictures.Coil need to be cleaned,sanded and i need to make holder for rod.Comment
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I like it. If that is your first ever coil, you have made a nice job.
I notice the resistors in series with the TX coil, to help get the Q-factor correct. Not a common technique, but it has its uses. You can also achieve the same results with a parallel resistor across the ends of the coil, though calculating the correct value is harder. A parallel resistor doesn't need to be inside the search-coil, so you could fit it in the back of the coil plug, for example. (note: I haven't tried this).Comment
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