Homebrew PCBs

Adam 
I use this tank http://www.web-tronics.com/lowcosetsysw.html
It does 2 double side boards in about 4min.
It has about 4 small holes at the bottom only and uses an aquarium
pump, low pressure.  
There are as you call it sweet spots in the tank that etch faster than
others. But this is no real problem. I have forgot about it 
and left for an hour. All it did was make my trace narrower.

Derek


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