northwest Revisiting Home brew Plate Through Holes
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Another satisfied QED user!
QED user report for 9 days detecting! User loves it, found it easy to use,found gold with it and he prefers it to his 5000! Also a report on a QED used at the beach for coin shooting.QED users reporting in with their multi ounce gold finds with the QED!
QED is here! ML have NOT stopped the QED!
The QED pictured is backward compatible with the current QED and has been designed and made by a member here. The firmware and circuit are identical with the current version except for a change in the face plate and control box. Changing to this configuration will NOT void the warranty when performed by the control box designer as it has been endorsed, approved and authorized by the QED manufacturer. The 4th button will not work at this time as the  firmware update for that has not been created yet and when its available will be provided free of charge (other than postage costs)by BW.

Goldsearch Australia has been appointed the Australian Distributor for the QED. QED info on the Goldsearch website has been updated.
This is the only forum where you can talk directly with the designer/ manufacturer of the QED and  also some very experienced QED users.
Jrbeatty and Reg Wilson  and  Yellowfin  (or Doug here for that matter!)have NO vested  or pecuniary interests(or secret deals or cash for comment or any other undisclosed benefits )in the QED other than using it to find gold which it is doing very successfully!

australian electronic gold prospecting  |  DIY forum  |  DIY forum  |  Topic: Revisiting Home brew Plate Through Holes 0 Members and 1 Guest are viewing this topic. « previous next »
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Author Topic: Revisiting Home brew Plate Through Holes  (Read 375 times)
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« on: Monday May 12 2014 21:49:12 AEST PM »

Following on from this thread :   

I always thought it would be great if this could be done at home. I found plenty on the internet about making your own conductive ink, and I also found various links mentioning another process suitable for creating a conductive layer through holes and which can be plated to provide a robust connection. It all seemed to involve a lot of fiddling and jumping through hoops to get certain chemicals.

But over the weekend I revisited some of those old saved links and found some new ones which I would like to put here.


The above "instructables"  link is by authored by Sergiy Yevtushenco. Its based on method used in the old Soviet era. With the changes that took over, i.e Western influence, investment, methods - this process was almost forgotten. But it has regained some popularity amongst hobbyists,  worldwide. He gives a some useful tips in the comments section of his instructable.


Another link detailing the process. Part 5 very useful for anyone having trouble finding affordable calcium hypophosphite, and shows how to easily  convert cheaper and more readily available sodium hypophosphite into what is needed.

A youtube video showing the activating and plating :   

And a constant current circuit for use in home copper plating :   

So for anyone that is already setup for home photo-etching, and has a supply of copper clad board and dry film photo resist and suitable psu, the above links should offer some good leads on how to do it at home.

With practice, a layout like this one created by Mechanic (    ), could be done at home and result in a ready to solder board - in a few hours.
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