Proceed with Caution!Marcelnl - My math show's around 1 amp required for just the 16 DAC chips and yes at least 1 amp for headroom is minimum in my book too.
The R-Core transformer inside the DC-30 can supply 2.5 amps with the yellow 12V AC tap. I prefer the extra current it provides at the expense of more heat. I found that by simply installing taller feat under the DC-30 provided a "substantial" reduction of heat to the aluminum case. Now it is just warm to the touch.
I talked to Michael and his plan is to continue using the 9V AC blue wire for the production Chameleon DAC. This keeps everything within a safe margin no matter what worldwide voltage is being used. I agree.
However for us solder heads he suggests as long as we keep the case cool there should be no long term issues using the "Yellow Wire Mod." This is not exactly a green light from the designer, more like a flashing yellow light.
Proceed with Caution!