Homebrew PCBs

I not sure why you need such a high temperature.  I just got done 
etching 3 boards in AP using an aquarium heater cranked all the way 
up.  The first one took about 25 minutes because I was unwilling to 
wait for a full warm up.  Once the temp reached the high point (about 
100 F), etching took about 10 minutes.  I also use a bubbler and that 
speeds it along.

I'm not sure how I feel about AP in general but it was really cool to 
watch the light start to come through the boards.  try that with 
swamp water, er, FeCl...

--- In Homebrew_PCBs@yahoogroups.com, Stefan Trethan 
<stefan_trethan@g...> wrote:
> On Wed, 03 Mar 2004 16:30:16 -0000, mumin55555 <MUMIN55555@H...> 
> wrote:
> 
> > HALLO!
> >
> > im want to buy a water heater for the etching tank i am building.
> > my problem is: no aquarioum heater thermostat goes more then 34
> > degrees c, while i need about 60 i think- for ammounium 
phersulphate.
> > what can i do?
> >
> > thanks a lot
> > mumin
> >
> >
> 
> tweak it ;-)
> 
> "more power"...
> 
> or make it yourself from a lab glass tube and some resistance wire.
> most likely cheaper and maybe you can not take the commercial unit
> apart without damage.
> 
> i filled the glass tube with silicone, thermal epoxy would be 
better.
> however i do not use the heater (HCl and H2O2 needs none).
> 
> you could also glue a "second floor" in your etch tank and put the 
heating 
> wire there,
> or a heating plate. (depends on tank material also).
> 
> ST