Heathkit GD-348 Build Manual / Instructions?

My son (11) was asking about metal detectors so I pulled out the old Heathkit GD-348 my Dad & I built back in the '70's.

Unfortunately it's developed a few issues and needs fixing.   I found the schematics online, but I'd really like a copy of the original build manual & instructions.

Anyone have any idea about finding that?  I thought for sure all of that old Heathkit stuff would be posted as PDF's but most of what's out there is what the Ham Radio guys collected.

Thanks!

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My first detector came from Heathkit also. I got mine back in the 60's it was a kitco, my dad and I put it together and the first coin I found was a 1899 Barber dime in the front yard of our farm house. If I remember correctly, the GD348 was more of a Gold and relic machine than a coin shooter.

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I had an earlier version, the GD-48. It couldn't find its way to a coin if it sat on it!!   

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