Thanks for the answer
Unfortunately my receiver is tooooo old (Futaba AM@27MHz) and has not a spare slot.
So, your second way is to connect it directly by soldering the cooler's power wire on the ESC's input cable? There the voltage is 7.2V and the cooler is only 6V.
My idea is to put a Y-harness on the BEC (6V) cable of the ESC (like this one:
http://www3.towerhobbies.com/cgi-bin...&I=LXSGN3&P=SM). Is this way right?
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AE RC10B44 FT (2007)
Kyosho Inferno 4WD (1996)
Kyosho Stinger MKII (1994)
Kyosho Ultima II (1993)
Kyosho Rampage 2WD (1992)
Kyosho DoubleDare 4WDS (1991)