Homebrew PCBs

mpdickens wrote:

> I have been attempting to find a cheap source of
> phosphorized copper (Deoxified copper) for thru hole
> plating. I know that phosphorized copper anodes are
> typically around 5% phosphor. I have located copper
> welding rods that contain 7% phosphor and 93% copper.
> Further, these rods do not contain other additives. 
> 
> Does anybody know if the extra 2% phosphor will make a
> difference when plating? 

I have no idea, but according to my references, the copper anodes 
should contain about 0.05% phosphor.
I think phosphor is only important when using additives, and a 
high acid/low copper content bath. i.e the baths used for PCBs.