Simple Sinewave generator

There is simple and good way to generate quite pure sine wave:
simpe sine wave generator
This circuit is not very simple, but results are quite fine: output is pure sine wave. From the other side, this schematics have some minuses: it is hard to change frequence. So this type of generator is not very usefull for variable frequence devices.

For my purpose I am using this generator to modulate RF. Here are some osciloscope shots of real world hardware:
Sine wave osciloscope image

AM modulation in it’s clasic way:

SIN generator

P.S. this device use dual polarity power suply.

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