Around here, a search of thrift stores turns up quite a few model
train transformers and slot car tranformers, at very cheap prices.
Not all light dimmers will handle a transformer as a load and may blow
out. If the transformer is at too high a voltage, you can ease both
problems by putting an incandescent light bulb in series with the
primary and attach this to the light dimmer.
Steve
--- In Homebrew_PCBs@yahoogroups.com, "twb8899" <twb8899@y...> wrote:
...
> A regulated power supply may not be the best way to make a rectifier.
> I have always used a "variac" variable transformer controlled
> rectifier for plating. This allows to current to be set without the
> power supply trying to compensate. The voltage will end up where it
> needs to be if the current is set properly. You could try using a
> model train transformer for your rectifier or use a triac lamp dimmer
> to control the power supply transformer. Maybe some of these ideas
> will help.