Thanks Bojan,
yes the etch tank I made years ago but the only downside is the
maximum board size it holds.
Air is delivered via a complex regulator system....a hose squeezed
with a G-clamp
and a head tank of air from the compressor.
Etch takes only 3-5mins if the FeCl is above 30-40C so the air
flow doesn't change that much in that time.
Your board is on it's way. I will email you a layout etc so you're not
completely in the dark
The reliable process has now allowed me to think about a better
designed Bartels board as we discussed.
As you suggested , I think a series of daughter boards would be
a better approach.
There is always a negative though....When something works so
well it only adds to the long list of projects on the drawing board!
Isn't the ATM game fun!
Steve