With your hands.
You can use a low-pass filter (passive is mostly coils) but you won't end up with a square wave.
fundamental wave component is filtered in the front end.
There are no best harmonics.
Harmonics is multiple of fundamental frequency. Spurious is not related to fundamental frequency but it is observed at the output spectrum. Harmonics are generated due to non-linearity of the device. Harmonics can generate spurious. As an example harmonics can produce resonance with mechanical box internal structure and can generate spurious. Harmonics generally generated from TCXO & frequency multipliers. If amplifier is non-linear, this will also generate harmonics. But harmonics very near to carrier generally generates interference to modulating signals. We design final power amplifier as a class AB amplifier to get more output power and better efficiency and also to minimize output power variation with temperature. Since it is non linear amplifier it generates harmonics but it will be very far from carrier and can be filtered easily. See the link for detail :- http://harshit.org/spurious and harmonics.pdf
A guitar is a far more complex structure than a tuning fork, and has more harmonics. The whole design of a tuning fork is intended to give as simple and pure a sound as possible, since that is the easiest type of sound to use when you are trying to tune an instrument. You wouldn't want harmonics in a tuning fork.
Sigma Harmonics happened in 2008.
Psy-Harmonics was created in 1993.
Odd harmonics are theoretically the only harmonics that are produced by a push-pull amplifier, and even the level of odd harmonics should be very low.
harmonic filter capacitor is used to filterize the unwanted heat created by a certain component like power supply. harmonics are voltage or currents that operates a certain frequency. john
They're called "harmonics".
Sigma Harmonics was created on 2008-08-21.
Harmonics are a multiple of the fundamental frequency. If the power frequency is 60Hz, harmonics occur at 120Hz, 180Hz, 240Hz, etc.