Homebrew PCBs

Chris,

For a small station, using massive anodes is much easier than the nugget 
aproach.

I use copper anodes which are 100 x 80 x 8 mm in size. I made a thread 
into one of the sides and use another copper rod (also with a thread) 
that goes into the anodes. I then moved a pvc tube over the rod and 
sealed it on the bottom towards the anodes with PVC glue to avoid the 
rod being used up by the plating process. You then can easily attach 
wires to the top of the rod.

Be aware that at least Bungards starter kit is not evenly divideable. 
That said some containers contain proportionally more of a given bath 
(i.e. the predip) than others. So your calculation to divide it by 7 
might be too optimistic. Can't comment on the one from MegaUK. Back when 
I started, I also did so with Bugnard.

Putting the chemistry back into bottles is a good idea anyways. I also 
do it this way for several reasons. It allows you to firmly keep it air 
sealed, and also to place it in a dark and cool place all of which helps 
to keep the chemistry alive over longer periodes.

HTH

Markus

scx31114 schrieb:
>
> Hello, the smallparts source is great, 6.3$ the part.
> For me, the problem getting to a pcb frabicant is a litt le problem
> for distances. I think, that i buy a starter package from MegaUK
> or from Bungard. I don\ufffdt know, if the chemical is allowed to be
> shipped over air. If there is interest, i can divide the chemical
> in 6 or 7 parts in order that don\ufffdt everyone needs to buy a starter
> kit. The price is 850 Euro div 6 (7)+ shipping.
> Similar thing can be made for solder/photo mask.
> As info, i plan to use PP boxes inside a larger heated water (???)
> tray. This water is circulated using a pump. The tray laying
> above a central rod, that makes all the liquid instable, and a
> rc servo drives the tray in order to oscillate over the rod.
> All this makes the heating and moving very cheap. This system
> works only for infrequent usage where the chemicals after using it
> are reposted inside it\ufffds bottles.
>
> For the thp station, i currently missing one information, probably
> patric know it\ufffds. Using nuggets, that goes down in the liquid,
> how the electrical connection is made. I heared professional
> manufacture uses titanum hulls, but there exist others, that don\ufffdt
> use it. Can you explain it please ?
>
> Regards
> chris
>
>