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Offline dbannerTopic starter
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« on: May 27, 2015, 10:07:20 am »
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I found PCB foil layout for the Heathkit gd1290 metal detector if anyone interested I'll post. Its not in English but the part numbers correspond to the numbers on the original schematic.


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« Reply #1 on: May 27, 2015, 10:11:56 am »
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  Please Post it.   Does it have the parts lay out?

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« Reply #2 on: May 27, 2015, 01:35:01 pm »
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Here it is. Had this on file for a long time and only just realized it the gd348 with one small omission and a modified power supply.

Posted on: May 27, 2015, 01:20:32 pm
I meant the gd1290 not the gd348. Coil cal. section omitted freeing up op amp on quad op amp to use instead of single op amp otherwise everything the same.

Posted on: May 27, 2015, 01:29:56 pm
The resistor and cap part number correspond to the part numbers on original schematic so the values are easy to know.

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