@Qiaozhi,,,Thanks for the info and the document,,,learnt something new! @Lamois,,Thanks for the link but I think this bagful I have here, according to the info, will do the job. Thanks, Regards, Marty.
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I'm in strong objection to the name of this project.
Sounds like I may never return from a treasure hunt!
"It was the Voodoo detector that finally did him in"...."we found his body half way down a 2 meter hole clutching a shovel in his hand....the metal detector he was supposedly swinging was nowhere to be found"
I'll order the book. Thanks for the project.
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George,
Reading a little more of this interesting book, a new question arises. On page 29, when describing TP5, at the end of the paragraph it says:
... the Troy coil (Fig. 3-18 ).
Shouldn't it say the following?
... the Troy coil (Fig. 3-16).
Greetings to all
Phantom
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Originally posted by Phatom View PostGeorge,
Reading a little more of this interesting book, a new question arises. On page 29, when describing TP5, at the end of the paragraph it says:
... the Troy coil (Fig. 3-18 ).
Shouldn't it say the following?
... the Troy coil (Fig. 3-16).
Greetings to all
Phantom
I can see a future proof reader ...
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Originally posted by Qiaozhi View PostYes, that should be Fig. 3-16. I'll add that to post #1.
I can see a future proof reader ...
George,
For years as part of my work I had to write technical documents. I read each document some times to correct misprints and mistakes. But if you are the author, you can read a hundred times and you aren't able to see a lot of them. You pass over as the document was perfect.
Later, when you put the document for review by the rest of the team members, that's when the errors appear and hit you in the eyes. This is inevitable, don't worry too much.
Regards to all
Phantom
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Originally posted by Phatom View Post
George,
For years as part of my work I had to write technical documents. I read each document some times to correct misprints and mistakes. But if you are the author, you can read a hundred times and you aren't able to see a lot of them. You pass over as the document was perfect.
Later, when you put the document for review by the rest of the team members, that's when the errors appear and hit you in the eyes. This is inevitable, don't worry too much.
Regards to all
PhantomYes, I know. Same thing happened with ITMD. Carl and I read and re-read it 100s of times.
Talking of errors ... I notice that your account name is Phatom, but you sign off as Phantom. Would you like me to correct that?Last edited by Qiaozhi; 10-25-2020, 09:48 PM.
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PCB's have arrived no thanks to dhl,
they look good, now the longer wait for the book.Attached Files
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Originally posted by Qiaozhi View PostYes, I know. Same thing happened with ITMD. Carl and I read and re-read it 100s of times.
Talking of errors ... I notice that your account name is Phatom, but you sign off as Phantom. Would you like me to correct that?
Gerorge,
Yes, this is the clear example of a typing error. Then I did not know if trying to correct it would lose my account
I would be very grateful if you made this change. Thank you very much
Cheers to all
Phantom
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Originally posted by bernte_one View Posti want to draw a concentric coil shell for 3d printing
it should have 280mm outer diamater,
what inner diameter is best choice / relation ?
Personally I like the ratio used by the Laser and Tesoro coils.
Using the outer diameters of the loops as a reference, the Laser has 9" (229mm) and 3.75" (95mm), which is a ratio of 2.4:1.
Whereas the 12" (305mm) White's coil has an inner loop [outer] diameter of 6" (152mm), which is a ratio of 2:1.
I find that the smaller diameter inner loop provides better target separation. However, having a smaller diameter requires more turns to achieve the same inductance.
Based on a ratio of 2.4:1, this indicates an inner loop [outer] diameter of 117mm for the 280mm coil.
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@Qiaozhi,,,Regarding the depth that the Voodoo is capable of, what would be a reasonable estimation of depth say for a 7" coil compared to a 9" coil please? Personally I'm not looking for any extreme depths as such as I think around 8" depth is ample for me for Inland detecting. The esimation will help give me an idea of which coil/coils to build for testing once I've built the Voodoo. Thanks George, Regards, Marty.
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Originally posted by Carl-NC View PostI proof-read the entire Voodoo book twice, still missed things.I think a better proof reader is someone who is not very familiar with the topic.
Maybe a combination of familiar and not familiar is the key to an error-free result.
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