You're right Rick, we'll also need swimming suits and fishing rods!
I've got two problems:
First one: to change line on my post, I have to write "br" beetwen quotes. Is there an easier way?
I will come back to France with a Krell KRC-3 preamp. An american one, supplied with 110V/60V. Working on the power transformer, or using a converter, is not enough. An internal chip is monitoring the supply frequency, and Krell is asking me a huge price to make the job.
I got some information on "DIY Audio" forum, by working on the program of the chip, or "fooling" the chip by putting a 60Hz signal on its pin. I'm used working on microcontroler, but I'm afraid to make destructive mistake...
For the time being, the safer solution is to use a 12V/300W supply (like the one used for ledstrips), connected to a 300W 110V/60Hz pure sine inverter. Like a "regenerator", but much more cheaper. I guess 300W will be way enough.
The way Krell is trying to avoid a parallel market from USA to the rest of the world is awfull, especially for old devices...