In article <000201bd9582$aafc7200$2f040404@Dino>, Leonardo De Palo writes >This apparatus, (reading the technical description) are able to generate a >variable tension between 200 and 800 Volt, with 45 milliampere at 1 Mhz. >The front panel have a timer and a couple pushbutton to increase or decrease >the power at the tweezer. 9 to 36 watt of RF power seems a lot to fry a pubic hair. But obviously it works, so let's see how it's done : a quick search of http://www.patents.ibm.com reveals that the problem of hair removal has taxed the human ingenuity for some time. Beside all kinds of mechanical plucking devices just about anything had been tried, including lasers and capacitor discharge. Patent 5,026,369 (I love the pictures) looks interesting but it is only dc - this would probably be easier to control though. Patent 4,174,714 looks more like it but seems pre-occupied with the tweezer part of the device. Bring up a list of patents referencing this one ... The problem seems to be how to fry the follicle, which is quite conductive, while not damaging the surrounding tissue and not instantly vapourising the relatively non-conductive hair. Hence the RF (skin effect). Have a browse through the patents (search for 'hair removal' AND 'electrical'). I just hope that you have a willing test subject lined up. Karel -- ++++++++++++++++++ KH Design & Development ++++++++++++++++++ Electrochemical Corrosion Measurement and Control Consultancy http://www.khdesign.demon.co.uk/