Homebrew PCBs

can you give me a picture or be more specified on how to build it???



--- In Homebrew_PCBs@yahoogroups.com, "Leon Heller" 
<leon_heller@h...> wrote:
> 
> ----- Original Message ----- 
> From: "mumin55555" <MUMIN55555@H...>
> To: <Homebrew_PCBs@yahoogroups.com>
> Sent: Tuesday, February 17, 2004 7:35 PM
> Subject: [Homebrew_PCBs] its me from the etching tank question 
again!
> 
> 
> > here in israel, thought we are a very advanced country- it is
> > sometimes very hard or impossible to find equipment for certain
> > things. so, i want to built the etching tank by myself. can 
someone
> > please explain me exacly how this "spray etcher" works???
> 
> 
> The etchant is pumped through 'spray bars', tubes with holes 
drilled in
> them. For a small unit you might only need a couple of them. Some
> experimentation will be needed to get the pressure and hole size 
correct.
> Spray etching has the advantage of speed - Mega Electronics claims 
90 s with
> fresh ferric chloride for their spray etcher. It does cost 1600 
GBP, though.
> 
> Leon
> --
> Leon Heller, G1HSM
> Email: aqzf13@d...
> My low-cost Philips LPC210x ARM development system:
> http://www.geocities.com/leon_heller/lpc2104.html