The performance of a single-transistor pulse (harmonic)-generator is covered
in program HARM_GEN now available from website below in a few seconds. Easy
to run.

The manner in which the amplitude of the harmonics 1 to 30 vary with
frequency and with operating angle (pulse width) are shown.

In general, with a very short pulse width, as the harmonic number increases,
the output level falls fairly uniformly. But as pulse width (operating
angle) increases then some harmonics almost disappear from the spectrum.
The program displays harmonic levels in decibels.

Fourier, that great French mathematician/philosopher wuz right! I think he
missed Madame guillotine.

Download program HARM_GEN now. It might be useful one day.
----
.................................................. ..........
Regards from Reg, G4FGQ
For Free Radio Design Software go to
http://www.btinternet.com/~g4fgq.regp
.................................................. ..........

On Tue, 16 Mar 2004 22:31:50 +0000 (UTC), "Reg Edwards"
wrote:

Download program HARM_GEN now. It might be useful one day.

Bloody right! Thanks, Reg.
--

The BBC: Licensed at public expense to spread lies.

On Tue, 16 Mar 2004 22:31:50 +0000 (UTC), "Reg Edwards"
wrote:

Download program HARM_GEN now. It might be useful one day.

Bloody right! Thanks, Reg.
--

The BBC: Licensed at public expense to spread lies.

Hi,

Fourier, that great French mathematician/philosopher wuz right! I think he
missed Madame guillotine.

Yes, he died in Paris in 1830. He was an active revolutionary but fell foul
of the powers that be and was imprisoned for a short time. Fortunately for him
they topped Robespierre first and he was released when the politics changed as
a result. As he wasn't into electric phenomena, he wouldn't have realised the
uses that the offshoot of his theory on the conduction of heat in solids (
Fourier Series) would be put to in later years. So the next time you burn
yourself, while holding a piece of wire you're in the act of soldering, you
will know who to blame.


Cheers - Joe

Hi,

Fourier, that great French mathematician/philosopher wuz right! I think he
missed Madame guillotine.

Yes, he died in Paris in 1830. He was an active revolutionary but fell foul
of the powers that be and was imprisoned for a short time. Fortunately for him
they topped Robespierre first and he was released when the politics changed as
a result. As he wasn't into electric phenomena, he wouldn't have realised the
uses that the offshoot of his theory on the conduction of heat in solids (
Fourier Series) would be put to in later years. So the next time you burn
yourself, while holding a piece of wire you're in the act of soldering, you
will know who to blame.


Cheers - Joe

Fourier, that great French mathematician/philosopher wuz right! I think
he
missed Madame guillotine.

Yes, he died in Paris in 1830.
As he wasn't into electric phenomena, he wouldn't have realised the
uses that the offshoot of his theory on the conduction of heat in solids (
Fourier Series) would be put to in later years.

So the next time you burn yourself, while
while holding a piece of wire you're in the
act of soldering, you will know who to blame.

No. Its the LACK of understanding of the Fourier Series which causes
blisters.

It is not surprising Fourier narrowly escaped the guiliotine. During that
era the French were ahead of the world in mathematics, statistics, physics,
etc. But the researchers were the idle rich of the nobility who did it as a
satisfying hobby.

For example, the idle rich used the technical subject of probability and
statistics to help themselves at the tables in the Parisian gaming houses.
This was not an activity likely to endear itself to the revolutionary mobs
behind the barracades in the streets of French cities. And so a number of
clever academics and noblemen fell to the embrace of Madamme Guilotine.
Napoleon soon put things on the right track.

Although Fourier Analysis was first applied to the conduction of heat by the
French philosophers it has, of course, since been applied to electrical
matters.

But it was Oliver Heaviside, a self-taught Englishman from the working
class, who many years later, around 1872 solved the mathematical problems
associated with the transient behaviour of electrical equipment and
transmission lines. He too ended up with an infinite series of terms, not
functions of frequency, but ot time.
----
Reg.

Fourier, that great French mathematician/philosopher wuz right! I think
he
missed Madame guillotine.

Yes, he died in Paris in 1830.
As he wasn't into electric phenomena, he wouldn't have realised the
uses that the offshoot of his theory on the conduction of heat in solids (
Fourier Series) would be put to in later years.

So the next time you burn yourself, while
while holding a piece of wire you're in the
act of soldering, you will know who to blame.

No. Its the LACK of understanding of the Fourier Series which causes
blisters.

It is not surprising Fourier narrowly escaped the guiliotine. During that
era the French were ahead of the world in mathematics, statistics, physics,
etc. But the researchers were the idle rich of the nobility who did it as a
satisfying hobby.

For example, the idle rich used the technical subject of probability and
statistics to help themselves at the tables in the Parisian gaming houses.
This was not an activity likely to endear itself to the revolutionary mobs
behind the barracades in the streets of French cities. And so a number of
clever academics and noblemen fell to the embrace of Madamme Guilotine.
Napoleon soon put things on the right track.

Although Fourier Analysis was first applied to the conduction of heat by the
French philosophers it has, of course, since been applied to electrical
matters.

But it was Oliver Heaviside, a self-taught Englishman from the working
class, who many years later, around 1872 solved the mathematical problems
associated with the transient behaviour of electrical equipment and
transmission lines. He too ended up with an infinite series of terms, not
functions of frequency, but ot time.
----
Reg.