"ruffrecords"
Phil Allison wrote:

To produce FM there needs to be a non-linearity.

Not really. A nonlinearity produces AM.

Yes really. It is exactly how a mixer works in a receiver. The non
linearity produces sum and difference frequencies.


** Which is characteristic of AM - you jerk.



Both FM and AM have sidebands (sum and difference frequencies). A
non-linearity can produce a number of effects, like harmonics for
example, not just AM.


** But simple circuit non linearity *** cannot*** produce FM.

That requires another mechanism.



And if you continue to reply with personal remarks I'll simply ignore you.



** You are just another demented pommy ****wit.


I do so hope that does the job.




............ Phil