This one is following in the line of other Belkin TuneCast mods, but this is for the current version, which I call the TC3... :)
I am not responsible for creating this mod, I found it through searching the web, and I have customised it to my needs and style.
This is where I found the mod originally...http://dreamlayers.blogspot.com/2008/09/simple-belkin-tunecast-3-mod-to-boost.html
Please note, this is a modification of FM transmission equipment, increasing the range of a range-limited device may not be legal in your location, so do this entirely at your own risk, if men in dark suits come knocking, it is not my fault!!!
(Thanks to vandmatt who reminded me that C means capacitor and R means resistor when it comes to labelling on the circuit board... :) )