Gerard,
The internal 5volt regulator for the Nano is supplying the power to just the 5volt parts of the Raduino (or anything else connected to the 5volt rail).? This usually includes the display which is why IF you have a larger than a 3.5" display you should supply it with a separate 5volt source.? The Nano regulator can only supply a little over 500ma.?
The full radio is not being powered, only the Nano, Si5351, and the Display.??
73
Evan
AC9TU
