[G0HZU_JMR]

Here's a quick simulation using a square wave drive at 5Vpkpk. You can see the circuit outputs a 4Vpkpk sine wave at 1MHz with a 560R load.

A quick and dirty FFT analysis is included in the plot below and this shows that the worst case harmonic is better than 40dB down. It's probably close to 50dB down.

This amount of harmonic rejection is probably not necessary so if you can live with slightly higher harmonics on your sine wave then the network could be redesigned for a lower Q.

This lower Q is achieved by simply changing the 6.22 value down to something lower. This will mean the inductor value will go up.

A Q of 4.1 would deliver component values of 2.2nF and 22uH and 2.2nF. This circuit will have slightly less loss and will be less peaky when adjusting the inductor for max output at 1MHz. However, the price for this is slightly more distortion on the sine wave. I doubt you would be able to tell on a scope though.