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Offline randagioTopic starter
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« on: October 25, 2010, 05:05:51 pm »
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Hola all!
can anyone help me about  the calibration of the md3009? also  i'm loking for the schematics
thank

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« Reply #1 on: October 25, 2010, 06:59:02 pm »
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Does this look the same?

gOOgle show Radio Shack detector 3009 here.


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Offline randagioTopic starter
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« Reply #2 on: October 26, 2010, 09:56:21 am »
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hi thanks for reply...no it's the seben 3009 i have read something about the calibration of internal trimmers  but i find nothing in internet

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Offline Eugene52
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« Reply #3 on: May 10, 2011, 03:29:14 pm »
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Hello Randagio . Please take clear photo's of the top and bottom of the Seben md3009 PCB "Circuit Board" . This  might help you to get a schematic or trimmer questions answered !!

Best Regards.............Eugene

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« Reply #4 on: June 10, 2011, 02:35:28 am »
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Hi,

the MD3009 is a chinese clone of the Fisher 1225-X, therefore schematics is the same and easily available! There are only minor differencies in onboard stabiliser (MD uses transistor instead of original FET).

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« Reply #5 on: June 10, 2011, 12:27:39 pm »
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Hello Everyone . Yes the Chinese 1225x is a great little machine !! I had a little trouble with the image [size limitation] , so the most important image I can not upload right now . But anyway I see 5 variable resistors [trimmers] on the circuit board . So-far I have not found  calibration specs . The only way to proper align is to find a perfect working 1225x or a china clone and measure the dc voltages on the trimmers or use oscilloscope at the test points .

HH........ Great.......Eugene



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« Reply #6 on: June 20, 2011, 10:37:52 am »
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I looked into my MD 3009 (an Fisher 1225-X clone) and realized, that my PCB is completely different from one published in previous thumbnails. The result is, that also schematics can substantially differ. I also tried to open the MD3009.ZIP but received a .LAY file, which I cannot read. Can anybody help with getting a corresponding schematics? Many thanks...

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Offline Eugene52
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« Reply #7 on: June 20, 2011, 12:37:14 pm »
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Quote:Posted by franny
I looked into my MD 3009 (an Fisher 1225-X clone) and realized, that my PCB is completely different from one published in previous thumbnails. The result is, that also schematics can substantially differ. I also tried to open the MD3009.ZIP but received a .LAY file, which I cannot read. Can anybody help with getting a corresponding schematics? Many thanks...


Hello Franny . The best thing you can do is take a clear picture of your MD 3009 circuit board and post it right here !!
A photo will help us , in trying to find the correct schematic .

Best Regards..............Eugene



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« Reply #8 on: June 20, 2011, 12:57:17 pm »
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This Program will let you open lay files and check it out.

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http://www.abacom-online.de/uk/html/sprint-layout.html




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« Reply #9 on: June 20, 2011, 05:15:09 pm »
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But it is still very important to see the actual MD3009 circuit board photo from Franny . If not , then no questions will ever be answered !!  20,480 kilo-bytes is the new attachment limit per photo .
Miniature thumbnails on the forum main page now . This may effect all future schematic and PCB [circuit board] postings . Franny may now have to post the circuit board photo in the "Download Area" of this Forum now.

HH...........Eugene



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