.5% is not great accuracy, most crystals are 10x better and a heck of a lot more stable.
However for a CPU its about all you need.
I'll box up the Raduino as then radiated spurs have less a change to propagate.? If they
are not in a ham band I'll be very happy.? It is rare to find a radio without spurs causing
birdies even in the expensive commercial world.
The only way to avoid that in superhet radios is serious shielding, filtering,, and bypassing.?
That makes radios heavy and expensive.? The alternate is direct conversion image reject
architecture and that has headaches as well.
Allison
