[ARC5] BC-221-AKs

[Bill Fuqua]

   You are overlooking the most obvious waveform.
An asymmetrical wave form in time. A short pulse, one that a class C device 
would produce.
Ideally, an impulse, one that has a width of zero and an amplitude of 
infinity would produce
all harmonics. A class C oscillator or amplifier with a small conduction 
angle would produce
many strong harmonics even and odd. I have made an inexpensive calibrator 
that has produces
~6ns pulses and even at 10kHz fundamental it produces great harmonics up to 
2 meters with out
extremely strong ones at HF frequencies. I have also made a harmonic mixer 
to go with it that
allows you to tune oscillators and amplifiers. It also has a temperature 
compensated crystal
oscillator.
73
Bill wa4lav


At 05:51 PM 11/23/2012 -0800, J. Forster wrote:
>Correct. I have to brush up on Fourrier theory, but I suspect the
>asymmetry has to do with filling in the even harmonics. A square wave only
>has odd.
>
>-John
>
>=======================
>
>
> > By the way, I would have thought that we did NOT want a pure sine-wave
> > output from these
> > in the interests of maximum harmonic output. Am I wrong?
> >
> > I would have thought that the output should be as close to a square-wave
> > as possible.
> >
> > Ken W7EKB
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