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Offline ekitts
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« Reply #10 on: April 22, 2009, 03:25:10 pm »
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Gary was working on a two box on his site, Don't know if he posted it yet or not.

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« Reply #11 on: May 28, 2009, 03:44:02 am »
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I would like to see the Schematic too.
Earl

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« Reply #12 on: May 28, 2009, 09:10:47 am »
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Hello Everyone . I posted a couple of "Two-Box projects" here on this forum several months ago . And as you already know , Gary who runs the Chemelec website will be glad to help you as soon when he recovers from his major lung surgery . He has a great  , easy to make two box somewhere on his website . I will be off this forum till July due to extensive traveling . I hope others can answer questions and post circuits here on this forum while I am away....... If you look carefully there are some great Metal Detector projects already posted on Thunting.com......Best Regards.......Eugene

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« Reply #13 on: May 28, 2009, 02:41:54 pm »
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Unless Gary has put back up lately it was pulled last year. I have what he put up at the time, But he pulled it back off.
Earl

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« Reply #14 on: May 31, 2009, 11:39:23 am »
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Hello ekitts and everyone. We definitely need to post or start a 2 box project here on this forum . There was a complete whites 2 box project that is built on a single circuit board that would be great for building and is specifically used for very deep detecting . I think it is posted on this forum already ....... In the meantime here is one of Garys links that he was working on in 2006 . But it is from 1967 and very poor performance , just for reading and experimenting .......And everyone knows The best two-box on the market is the Discovery TF900 then the Fisher Gemini-III . Then the Whites TM808 which some have built or are building . The Whites 2 box would be the best way to go !! .........I will post what I can for now but I am away from my computer/schematics for 1 month........If anyone has more Two-box schematics please post them right here !! .......Best Regards............Eugene

 

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http://www3.telus.net/chemelec/Projects/Balance-Bridge/Balance-Bridge.htm


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« Reply #15 on: May 31, 2009, 01:02:44 pm »
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Hello ekitts,everyone . I did a little more research and found different parts of Gary's project . The receiver section of the T/R he completed and posted , but the transmitter section of the T/R he completed and NEVER posted !! Here is what I found , plus a modified Russian two-box circuit Gary also worked on.......Regards............Eugene

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« Reply #16 on: May 31, 2009, 05:24:01 pm »
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Hello Everyone . Here is some great information on the best two-box made . Excellent information and schematic drawings from public patent documents . This is for the discovery TF-900 .......Later on I will re-post a complete two box project to build .......Regards....Eugene

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« Reply #17 on: June 01, 2009, 02:45:05 pm »
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Hello Everyone . Here is a the Two-Box Project I mentioned yesterday . Somewhere I have the information on the two search-coils and I also have a PCB file in dxf or Gerber format ........ So for right now , anyone interested in building this deep-seeker can see the circuit board , the schematic and check if they have all the parts . I will post more later on ........Best Regards....Eugene

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« Reply #18 on: July 31, 2009, 06:10:02 am »
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Hi ,
did someone tested the Russian schematic ?  They make  a transistor analog to CA3035 but I wonder is it working ..
I also wonder what gain is needed by the search coil amplifier .. because I have some instrumentation amplifiers with fixed  gain = 100, 1000
 

Anthony

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« Reply #19 on: July 31, 2009, 11:47:16 pm »
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Has anyone worked up a parts list?

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