northwest Revisiting Home brew Plate Through Holes
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Some software and hardware updates now available for the QED.More  QED firmware updates (inc Auto GB  option) just announced here. New  QED hardware updates/options and pictures will be posted  first here  as they become available.

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!
From  another QED user today:"Been out and about today testing and comparing against other machines etc in ground that has been horrible in the past.Bround balancing Ive found very simple and easy.'m using the Nokia booster but need a little more sound/threshold.Otherwise no complaints from me, very impressed."
and :"My QED with the 8” commander on it, out performed my SDC Got bits that don't register on my scales SDC has since been sold"
"My QED is terrific. Lightweight, very sensitive and screams at me when it hits any target. The Detect shaft and the 11" ultra sensing coil is a top quality fitout. I attached an external speaker which added under 200gms of weight in total and still remains very well balanced so i never feel fatigued after many hours of swinging."

Stinky  Pete : is the  Australian distributor for the QED.
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! The ONLY people deriving  an income from the QED(other than finding good gold) are the approved retailer and Bugwhiskers! The ONLY investor in the QED is Bugwhiskers!
I have never met Jrbeatty or Reg Wilson at Howards house or ANY other location!

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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« 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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