Homebrew PCBs

On Thu, 10 Mar 2005 22:47:31 +0100, lists  
<stuart.winsor.lists@...> wrote:

>
> How about sitting the tray on the cone edges of an old loudspeaker - say
> about an 8". With a tone generator and an amplifier you could experiment
> with different frequencies to see which produced the desired effect -
> ultrasonic?


I'm curious about ultrasonic myself, but nobody having a ultrasonic  
cleaner has agreed to put in a plastic bag filled with etchant and board  
and try. Couldn't even find someone agreeing to see if toner "resist"  
survives ultrasonic in water.

As for the other motor/tray suggestions, i've graduated from tray to tank  
some time back, and no wish to go back.
thanks anyway.


ST

(P.S.: After one day in etchant (small jar don't want to contaminate tank)  
the round bubbler is still ok)