Homebrew PCBs

On Thu, 22 Jul 2004 12:33:59 -0000, you wrote:

>Well this is interesting. The original patent paper clearly states 
>that the etchant is pumped up the tube using a sprial mounted inside 
>the tube. This sounds reasonable to me but unfortunately will be 
>close to impossible to fabricate such a spiral. Somebody who has at 
>least a middle-sized lathe could probably try to turn it out of a 
>plastic bar, similar to turning a thread. I think I'll try the 3-
>hole type next.

Guys, no worries, it DOES WORK withouht any spindle of any sort. Just
look at the pictures I provided with the link to Radix in my previous
post. The main problem with the one I have is that IMHO the holes in
the tube are too thik and that there are too few of them.

Unfortunately I'm held too busy but once I have more time I definately
will modify the unit I have (or even build a new one from scratch).

Markus