Harmonic Output Filtering

Here are two articles that I have found especially useful for designing and building harmonic output filters for radio transmitters:

George Dobbs (G3RJV) Guide to Harmonic Filters

W3NQN_Harmonic_Filters

I have not built a CWAZ filter yet.  But, I did build a 7 pole harmonic filter for 7 MHz using the G3RJV design.