Quartz oscillation is well known for its high Q-Factor and stable frequency. I have read many articles which say that amplifying such quartz oscillations should not be easy. I am not a licensed radio amateur, but struggling now nearly two years for radio electronics. My question is about, how do the radio amateurs broadcast at stable frequency with power limitations radio signals each other? Either by coils amplified with standard Class A-F amplifiers or by quartz components which have better stability? How can I amplify for a higher power rate using simply a quartz? I would need for example 5 Watt power by using a quartz. How can I achieve this? I already know there are law restrictions. By the way, I can confess easily that I am a newbie. Below is a circuit which I have found on internet. This should give only an idea what I mean.