Metlicka Marc wrote to the list: > i don't know anything about vttc's but as a thought, if cooling is > desirable then a peltier unit, with a couple large heat sinks Marc, Peltier elements are very inefficient i.e. they need a lot of dc current (many As). VTTCs use high voltages and therefore insulation would be a problem. Usually it's easier to implement fans. Regards, Herwig