Homebrew PCBs

> If you can open it, try to set the thermostat a bit further than the outside
> screw end run (it's a guess or trial-and-error adjust...). Or get ride of it
> and use one of your own inside the glass tube controlled by external
> electronics.
> 
> If ferric chloride, 90ºF is good enough. Not as fast as 120ºF, but WAY
> FASTER than cold water temperature.
> Don't know about CuCl temperature differences.


Yes normally you can set the heaters higher by removing the knob or stop.  

When I used Ferric Chloride found that it worked best heated.  I use CuCl now and do not heat it.

Ben