Tesla coil
 

"Tesla coil circuits were used commercially in sparkgap radio transmitters
for wireless telegraphy until the 1920s,[1"
From: http://en.wikipedia.org/wiki/DRSSTC

But in 1929 was wrote: "It is not generally appreciated that this curious
apparatus, often associated with pretty or spectacular demonstrations of
high voltage electricity, is really a fundamental part of modern radio. For
all the tuning apparatus and circuits in every transmitting and receiving
set are simply variations of Tesla coils and Tesla coil circuits".
From: http://www.tfcbooks.com/tesla/1929-09-22.htm

Now is 2012. Is " this curious apparatus" the "fundamental part of modern
radio"? Of course in form of the " variations of Tesla coils and Tesla
coil circuits".
S*

Tesla coil
 

Jeff wrote:

No and yes. Tesla coils are not used to provide high voltages and
sparks, but resonant circuits, which a Tesla coil is, are used.


On the other hand, did anyone else notice that Tesla Motors Inc, makes an
Edison designed car? :-)

Geoff.


--
Geoffrey S. Mendelson, N3OWJ/4X1GM
My high blood pressure medicine reduces my midichlorian count. :-(

Tesla coil
 

On Apr 4, 2:42*am, "Szczepan Bialek" wrote:
Now is 2012. *Is " this curious apparatus" the "fundamental part of modern
radio"?

Here is a paper that will help explain the similarities:

http://hamwaves.com/antennas/inductance/corum.pdf

In Figure 2, the diagram of the Tesla coil looks identical to a 75m
mobile antenna with top hat.
--
73, Cecil, w5dxp.com

Tesla coil
 

Uzytkownik "Jeff" napisal w wiadomosci
...
On 04/04/2012 08:42, Szczepan Bialek wrote:
"Tesla coil circuits were used commercially in sparkgap radio
transmitters
for wireless telegraphy until the 1920s,[1"
From: http://en.wikipedia.org/wiki/DRSSTC

But in 1929 was wrote: "It is not generally appreciated that this
curious
apparatus, often associated with pretty or spectacular demonstrations of
high voltage electricity, is really a fundamental part of modern radio.
For
all the tuning apparatus and circuits in every transmitting and receiving
set are simply variations of Tesla coils and Tesla coil circuits".
From: http://www.tfcbooks.com/tesla/1929-09-22.htm

Now is 2012. Is " this curious apparatus" the "fundamental part of
modern
radio"? Of course in form of the " variations of Tesla coils and Tesla
coil circuits".
S*



No and yes. Tesla coils are not used to provide high voltages and sparks,
but resonant circuits, which a Tesla coil is, are used.

So in your transmitters are the coils made of wires?
Where can I find the scheme of a simple todays transmitter with the coils?

S*

I think Jeff - what the problem is, is that the VEC hands out Ham Radio Licenses like purple Quaalude's at a Grateful Dead Concert.

When your only goal is to increase the number of licensed amateurs, with no concern as to the education portion of the hobby, you end up with a pool of known nothing amateurs, who's only radio set up consists of a single or multiple single or dual band walkie talkies.

Even the local REACT chapter has more money invested in their cb radios and antenna's then the actual amateur radio - Technician Class license holder today.

The burden of proof is the fact that Amateur Radio Clubs in my area are being operated by people who have had their license for less then 5 years, and by people who has no actual real knowledge of how their radio actually works.

The Technology aspect of the club environment has been changed by coffee and doughnuts. " I pity the fool that gets between those club members and the coffee pot when the meeting is over!"

Because of that, most people feels that it is not necessary to join any club, or find a Elmer once you get a license. The people who holds a license isn't qualified to be a Elmer anyways. So basically these people are free to wander the earth, hopelessly lost. Not knowing what purpose Amateur Radio really serves. The ARRL, in hopes of attracting new members, says that the purpose of Amateur Radio is to do Ecom... ONLY Ecom requires training and participation and the use of more then just a simple walkie talkie.

When all else fails - amateur radio still works. - YES
But when all else fails - if your radio equipment does not work - you go hungry, Bow Wow Wow!

People sees something or they read something or they are spoon fed from the QST Magazine they get every month from their membership from the ARRL and they see the articles in the magazine, but the magazines real purpose is to sell stuff. The advertisers is what keeps the magazine going.
I say it over and over again. They are not going to say anything bad about amplifiers - because the first ad you usually see is for some type of amplifier.

People are like Tim the Toolman Taylor - More Power arugh arugh arugh!
Only there is no one around willing to stand up on the soap box and tell them that if you have a 100 watt transceiver, to move the S meter one S unit between S - 1 and S-8, you need to increase the power 4 times / hence you need 400 watts just to move the S meter one S unit.
All signals reduce at the square of the distance away!
1200 watts is only 2 S units.
Yet everyone thinks that with a 1500 watt amplifier, you are going to set the world on fire...
That's only one S Unit - if you were 10/S-9, or two S units if you were less then S-7 with 100 watts...

The stuff that Tesla was doing, would have burned the hair off your head while you stood there and looked at it.
He was able to send electricity through the air for something like 26 miles.
The reason why we don't use Tesla's model of electric transmission is due to the fact that if we did. all we would have to do is stick a antenna up in the air and receive electricity. They wouldn't even have to meter it, because it would be so cheap. The problem is - trying to get these cheap skates to pay for it.

Now think back - gee, stick a antenna in the air and receive free electricity.
Isn't that what we are doing with Amateur Radio?
Or antenna is a electrostatically charged device.
We create power when we transmit and we receive power when we receive someone else's signal..
Maybe what Tesla didn't understand was Broadcasting!
Maybe that was the reason why his coil was dismantled at the start of WW II - because the government knew that if it fell into enemy hands, it could be used to transmit anytime, day or night, globally - any information that someone wanted to send.

Even the largest transmitters of the time - such as WLW's Big Arse Transmitter couldn't compete with the one Tesla built....
http://www.ominous-valve.com/wlw.html

Tesla coil
 

Szczepan Bialek wrote:

napisa? w wiadomo?ci
...

No, you babbling moron.

A Tesla coil specifically refers to a resonant transformer specifically
designed to produce high voltages, typically much higher than 10,000
volts.

The coils in radio transmitters and receivers are part of resonant
circuits
specifically designed to provide either bandwidth limiting or impedance
matching or sometimes both.

Who was the inventor of this "coils in radio transmitters"?
S*

The first person to NOTICE that resonance exists in a capacitor and inductor
circuit, thus forming a tuned circuit, was Felix Savary in 1826.

The first patent for a spark-gap transmitter and a receiver with tuned
circuits in them was filed by Oliver Lodge in 1897.

Tesla coil
 

On Thu, 05 Apr 2012 19:27:08 +0100, Jeff wrote:



Who was the inventor of this "coils in radio transmitters"?

Marconi.

So this:

"A Magnifying Transmitter is an advanced version of Tesla's tesla coil, a
high power radio transmitter. Often cited as Tesla's greatest invention, the
Magnifying Transmitter consisted of three coils: an air-core transformer
plus a third coil operated as a grounded-base quarter-wave waveguide. In
Colorado Springs, Nikola Tesla constructed the first "Magnifying
Transmitter". From: http://www.wordiq.com/definition/Magnifying_Transmitter

is not true?
S*


That may or may not be a true account of a particular transmitter, but
has no bearing on the question that you asked, not being the first
transmitter to incorporate a coil.

Marconi tried to sell his communication system to the US army.
They refused to accept because the system would receive
from all ships simultaneously without selection.
Then he added selective tuneable circuits.

Tesla on the contrary polluted the whole radio band with his
broadband lightning towers and poked fun at those "Hertzian waves".
Tesla never understood and went bancrupt for senile stubborness.

w.

Tesla coil
 

On 4/5/2012 7:18 AM, Channel Jumper wrote:
I think Jeff - what the problem is, is that the VEC hands out Ham Radio
Licenses like purple Quaalude's at a Grateful Dead Concert.
snip crap

Even the largest transmitters of the time - such as WLW's Big Arse
Transmitter couldn't compete with the one Tesla built....
http://www.ominous-valve.com/wlw.html


And this has what to do with the subject?

Nothing at all.

tom
K0TAR

Tesla coil
 

On 4/5/2012 12:08 PM, Szczepan Bialek wrote:


So this:

"A Magnifying Transmitter is an advanced version of Tesla's tesla coil, a
high power radio transmitter. Often cited as Tesla's greatest invention, the
Magnifying Transmitter consisted of three coils: an air-core transformer
plus a third coil operated as a grounded-base quarter-wave waveguide. In
Colorado Springs, Nikola Tesla constructed the first "Magnifying
Transmitter". From: http://www.wordiq.com/definition/Magnifying_Transmitter

is not true?
S*



I'm not sure where all this is heading, but always keep in mind that
there is no free lunch, and at certain locations, lunch is very
overpriced for what you actually get for your money.

Actually, if you read Tom Edisons Bio - it says that he owed Tesla money and refused to pay.
Tesla was mad at Edison and said he was so stupid, he was willing to do something wrong 100 times until he found the right answer, then to spend the money and pay someone once to show him how to do it the right way.
Tom was the one who was hard headed.
Tesla's family was the ones who benefited by his death.
They were able to settle his estate and collect what was owed to them and were well off with the money that they received after his death.

Tesla was just stuck on trying to transmit electricity.
If you think about all the money spent on telephone poles, rights of ways, copper wire etc - if he could have perfected it - it would have made him a millionaire.

I would chock it up the same as the Tucker Automobile.
It was so far ahead of everyone else - as far as technology went that no one understood it and the Big 3 refused to allow him to make it, or they would have had to comply with the standards he invented and it would have cost them money, both in sales and in market share.

It was easier to get rid of Tucker then to allow him to produce his automobile and show the world how wrong the rest of the world was.

Things like air cooled engines, seat belts, padded dash boards, recessed knobs..

Tesla coil
 

"Jeff" napisal w wiadomosci
...


Who was the inventor of this "coils in radio transmitters"?

Marconi.

So this:

"A Magnifying Transmitter is an advanced version of Tesla's tesla coil, a
high power radio transmitter. Often cited as Tesla's greatest invention,
the
Magnifying Transmitter consisted of three coils: an air-core transformer
plus a third coil operated as a grounded-base quarter-wave waveguide. In
Colorado Springs, Nikola Tesla constructed the first "Magnifying
Transmitter". From:
http://www.wordiq.com/definition/Magnifying_Transmitter

is not true?
S*


That may or may not be a true account of a particular transmitter, but
has no bearing on the question that you asked, not being the first
transmitter to incorporate a coil.

My question was:
"Now is 2012. Is " this curious apparatus" the "fundamental part of modern
radio"? Of course in form of the " variations of Tesla coils and Tesla
coil circuits".

In 1924 Marx invented the High Voltage Generator without coils.
Tesla Coil is also HVG.

So I modify may question: "Are in todays transmitters "variations of Tesla
coils" or the "variations of Marx generators".
Or "is possible to do the transmitter without coils"?
If Yes, when was the first?
S*

Tesla coil
 

napisa³ w wiadomo¶ci
...
Szczepan Bialek wrote:

napisa? w wiadomo?ci
...

No, you babbling moron.

A Tesla coil specifically refers to a resonant transformer specifically
designed to produce high voltages, typically much higher than 10,000
volts.

The coils in radio transmitters and receivers are part of resonant
circuits
specifically designed to provide either bandwidth limiting or impedance
matching or sometimes both.

Who was the inventor of this "coils in radio transmitters"?
S*

The first person to NOTICE that resonance exists in a capacitor and
inductor
circuit, thus forming a tuned circuit, was Felix Savary in 1826.

The first patent for a spark-gap transmitter and a receiver with tuned
circuits in them was filed by Oliver Lodge in 1897.

But the transmitter was very weak. To be efficient it must has "the resonant
transformer specifically designed to produce high voltages".
Who was the inventor of the "the resonant transformer specifically designed
to produce high voltages".
S*

Tesla coil
 

Szczepan Bialek wrote:

napisa³ w wiadomo¶ci
...
Szczepan Bialek wrote:

napisa? w wiadomo?ci
...

No, you babbling moron.

A Tesla coil specifically refers to a resonant transformer specifically
designed to produce high voltages, typically much higher than 10,000
volts.

The coils in radio transmitters and receivers are part of resonant
circuits
specifically designed to provide either bandwidth limiting or impedance
matching or sometimes both.

Who was the inventor of this "coils in radio transmitters"?
S*

The first person to NOTICE that resonance exists in a capacitor and
inductor
circuit, thus forming a tuned circuit, was Felix Savary in 1826.

The first patent for a spark-gap transmitter and a receiver with tuned
circuits in them was filed by Oliver Lodge in 1897.

But the transmitter was very weak. To be efficient it must has "the resonant
transformer specifically designed to produce high voltages".
Who was the inventor of the "the resonant transformer specifically designed
to produce high voltages".
S*

When you are so obsessed with history, why don't you do your own research?

Asking questions here will never be useful for you because you are not
the type of man to accept any answer.

Tesla coil
 

"Rob" napisa³ w wiadomo¶ci
...
Szczepan Bialek wrote:

napisa3 w wiadomo?ci
...
Szczepan Bialek wrote:

napisa? w wiadomo?ci
...

No, you babbling moron.

A Tesla coil specifically refers to a resonant transformer
specifically
designed to produce high voltages, typically much higher than 10,000
volts.

The coils in radio transmitters and receivers are part of resonant
circuits
specifically designed to provide either bandwidth limiting or
impedance
matching or sometimes both.

Who was the inventor of this "coils in radio transmitters"?
S*

The first person to NOTICE that resonance exists in a capacitor and
inductor
circuit, thus forming a tuned circuit, was Felix Savary in 1826.

The first patent for a spark-gap transmitter and a receiver with tuned
circuits in them was filed by Oliver Lodge in 1897.

But the transmitter was very weak. To be efficient it must has "the
resonant
transformer specifically designed to produce high voltages".
Who was the inventor of the "the resonant transformer specifically
designed
to produce high voltages".
S*

When you are so obsessed with history, why don't you do your own research?

Asking questions here will never be useful for you because you are not
the type of man to accept any answer.

I am not "obsessed with history".

"My question was:
"Now is 2012. Is " this curious apparatus" the "fundamental part of modern
radio"? Of course in form of the " variations of Tesla coils and Tesla
coil circuits".

In 1924 Marx invented the High Voltage Generator without coils.
Tesla Coil is also HVG.

So I modify may question: "Are in today transmitters the "variations of
Tesla
coils" or the "variations of Marx generators".
Or "is possible to do the transmitter without coils"?
If Yes, when was the first?

I have never seen a transmitter (even that in a mobile phone).
S*

Tesla coil
 

"Jeff" napisal w wiadomosci
...


So I modify may question: "Are in today transmitters the "variations of
Tesla
coils" or the "variations of Marx generators".
Or "is possible to do the transmitter without coils"?
If Yes, when was the first?

I have never seen a transmitter (even that in a mobile phone).
S*

Neither, some of Tesla's equipment may have made use resonance, but they
are not the root of resonant circuits used in modern equipment.
ie Tesla coils did not turn into the circuits used today.

"is possible to do the transmitter without any coils"?
S*

Tesla coil
 

Szczepan Bialek wrote:

"Jeff" napisal w wiadomosci
...


Who was the inventor of this "coils in radio transmitters"?

Marconi.

So this:

"A Magnifying Transmitter is an advanced version of Tesla's tesla coil, a
high power radio transmitter. Often cited as Tesla's greatest invention,
the
Magnifying Transmitter consisted of three coils: an air-core transformer
plus a third coil operated as a grounded-base quarter-wave waveguide. In
Colorado Springs, Nikola Tesla constructed the first "Magnifying
Transmitter". From:
http://www.wordiq.com/definition/Magnifying_Transmitter

is not true?
S*


That may or may not be a true account of a particular transmitter, but
has no bearing on the question that you asked, not being the first
transmitter to incorporate a coil.

My question was:
"Now is 2012. Is " this curious apparatus" the "fundamental part of modern
radio"? Of course in form of the " variations of Tesla coils and Tesla
coil circuits".

In 1924 Marx invented the High Voltage Generator without coils.
Tesla Coil is also HVG.

So I modify may question: "Are in todays transmitters "variations of Tesla
coils" or the "variations of Marx generators".
Or "is possible to do the transmitter without coils"?
If Yes, when was the first?
S*

None of the above.

Modern recievers and transmitters contain coils but by no stretch of the
imagination could they be called Tesla coils.

Tesla coil
 

Szczepan Bialek wrote:

napisa? w wiadomo?ci
...
Szczepan Bialek wrote:

napisa? w wiadomo?ci
...

No, you babbling moron.

A Tesla coil specifically refers to a resonant transformer specifically
designed to produce high voltages, typically much higher than 10,000
volts.

The coils in radio transmitters and receivers are part of resonant
circuits
specifically designed to provide either bandwidth limiting or impedance
matching or sometimes both.

Who was the inventor of this "coils in radio transmitters"?
S*

The first person to NOTICE that resonance exists in a capacitor and
inductor
circuit, thus forming a tuned circuit, was Felix Savary in 1826.

The first patent for a spark-gap transmitter and a receiver with tuned
circuits in them was filed by Oliver Lodge in 1897.

But the transmitter was very weak. To be efficient it must has "the resonant
transformer specifically designed to produce high voltages".

No, that is utter nonsense that shows you know nothing about anything you
are talking about.

Who was the inventor of the "the resonant transformer specifically designed
to produce high voltages".
S*

Tesla, you babbling idiot, and it is called a Tesla coil.

Tesla coil
 

Szczepan Bialek wrote:

"Jeff" napisal w wiadomosci
...


So I modify may question: "Are in today transmitters the "variations of
Tesla
coils" or the "variations of Marx generators".
Or "is possible to do the transmitter without coils"?
If Yes, when was the first?

I have never seen a transmitter (even that in a mobile phone).
S*

Neither, some of Tesla's equipment may have made use resonance, but they
are not the root of resonant circuits used in modern equipment.
ie Tesla coils did not turn into the circuits used today.

"is possible to do the transmitter without any coils"?
S*

Yes.

Microwave transmitters routinely use resonant devices other than coils and
capacitors.

Tesla coil
 

On 4/5/2012 8:10 PM, Channel Jumper wrote:


Tesla was just stuck on trying to transmit electricity.
If you think about all the money spent on telephone poles, rights of
ways, copper wire etc - if he could have perfected it - it would have
made him a millionaire.

Dunno.. Transmitting electricity through the air strikes me as
quite lossy, and if using a broad pattern to enable many people to use
it, the amount of recoverable energy vs what is transmitted would be
fairly small. A large amount would go off into space totally wasted.
If his method were actually practical, I suspect someone would be
using it by now on some scale.
There are enough loss just using a direct connection with wire.
I can light a florescent light bulb using the energy from my
HF mobile antenna. But only if I have the tube right next to
the antenna. Five feet away, fugettaboutit..

Tesla coil
 

NM5K wrote:
On 4/5/2012 8:10 PM, Channel Jumper wrote:


Tesla was just stuck on trying to transmit electricity.
If you think about all the money spent on telephone poles, rights of
ways, copper wire etc - if he could have perfected it - it would have
made him a millionaire.

Dunno.. Transmitting electricity through the air strikes me as
quite lossy, and if using a broad pattern to enable many people to use
it, the amount of recoverable energy vs what is transmitted would be
fairly small. A large amount would go off into space totally wasted.
If his method were actually practical, I suspect someone would be
using it by now on some scale.

Exactly why the idea isn't used for anything much heavy duty than charging
a cell phone or a cordless toothbrush.

But system efficiency and losses were not something Tesla took into
concideration, nor was much thought put into how one whould charge
customers when they could have built the "receiver" end themselves
and obtained his electricity for free. Not a viable bussiness model.

Tesla coil
 

Well darnitall! There goes my idea for a wireless extension cord!

Irv VE6BP

wrote in message
...
NM5K wrote:
On 4/5/2012 8:10 PM, Channel Jumper wrote:


Tesla was just stuck on trying to transmit electricity.
If you think about all the money spent on telephone poles, rights of
ways, copper wire etc - if he could have perfected it - it would have
made him a millionaire.

Dunno.. Transmitting electricity through the air strikes me as
quite lossy, and if using a broad pattern to enable many people to use
it, the amount of recoverable energy vs what is transmitted would be
fairly small. A large amount would go off into space totally wasted.
If his method were actually practical, I suspect someone would be
using it by now on some scale.

Exactly why the idea isn't used for anything much heavy duty than charging
a cell phone or a cordless toothbrush.

But system efficiency and losses were not something Tesla took into
concideration, nor was much thought put into how one whould charge
customers when they could have built the "receiver" end themselves
and obtained his electricity for free. Not a viable bussiness model.

Tesla coil
 

napisa³ w wiadomo¶ci
...
Szczepan Bialek wrote:

"Jeff" napisal w wiadomosci
...


So I modify may question: "Are in today transmitters the "variations of
Tesla
coils" or the "variations of Marx generators".
Or "is possible to do the transmitter without coils"?
If Yes, when was the first?

I have never seen a transmitter (even that in a mobile phone).
S*

Neither, some of Tesla's equipment may have made use resonance, but they
are not the root of resonant circuits used in modern equipment.
ie Tesla coils did not turn into the circuits used today.

"is possible to do the transmitter without any coils"?
S*

Yes.

Microwave transmitters routinely use resonant devices other than coils and
capacitors.

Yes. It was impossible to "make" the microwave frequency using coils.
Magnetrons are for it.

But are the modern radio waves (ham) transmitters without any coils?
S*

Tesla coil
 

Uzytkownik "Jeff" napisal w wiadomosci
...

Microwave transmitters routinely use resonant devices other than coils
and
capacitors.

Yes. It was impossible to "make" the microwave frequency using coils.
Magnetrons are for it.

But are the modern radio waves (ham) transmitters without any coils?
S*


Generally they have coils, but NOT Tesla coils, it would be possible to
not use coils, but it not usual. (Depending on what you call a coil,
inductance would be a better word, as this can be generated in ways other
than what would normally be termed a 'coil'.)

A coil is made of a wire.
Are "magnetrons" or simmilar device for yours transmitters?
S*

Tesla coil
 

Szczepan Bialek wrote:

napisa? w wiadomo?ci
...
Szczepan Bialek wrote:

"Jeff" napisal w wiadomosci
...


So I modify may question: "Are in today transmitters the "variations of
Tesla
coils" or the "variations of Marx generators".
Or "is possible to do the transmitter without coils"?
If Yes, when was the first?

I have never seen a transmitter (even that in a mobile phone).
S*

Neither, some of Tesla's equipment may have made use resonance, but they
are not the root of resonant circuits used in modern equipment.
ie Tesla coils did not turn into the circuits used today.

"is possible to do the transmitter without any coils"?
S*

Yes.

Microwave transmitters routinely use resonant devices other than coils and
capacitors.

Yes. It was impossible to "make" the microwave frequency using coils.

No, it is not "impossible", just more difficult the higher in frequency
you go.

At lower microwave frequencies it is a coin toss whether to use coils
and capacitors or other things.

Magnetrons are for it.

Magnetrons are not relevevant to the question.

But are the modern radio waves (ham) transmitters without any coils?
S*

It is possible, at least at low HF, but not practical in general.

You are babbling.

Tesla coil
 

Szczepan Bialek wrote:

Uzytkownik "Jeff" napisal w wiadomosci
...

Microwave transmitters routinely use resonant devices other than coils
and
capacitors.

Yes. It was impossible to "make" the microwave frequency using coils.
Magnetrons are for it.

But are the modern radio waves (ham) transmitters without any coils?
S*


Generally they have coils, but NOT Tesla coils, it would be possible to
not use coils, but it not usual. (Depending on what you call a coil,
inductance would be a better word, as this can be generated in ways other
than what would normally be termed a 'coil'.)

A coil is made of a wire.

Well, usually but not necessarily.

Are "magnetrons" or simmilar device for yours transmitters?
S*

Magnetrons are microwave oscillators and impractical to build much below
1 GHz.

Magnetrons have nothing to do with coils of any kind.

You are babbling.

Tesla coil
 

Jeff is right, inductance would be the correct term but you want a coil made
of wire...Well what do you call a strip line used in VHF & UHF & beyond in
Ham Transmitters...I'm referring to a straight piece of wire (strip line)
that is not a coil & has no turns....Now you have your answer, it is
possible & is done with no coils...Howard K0ACF
"Szczepan Bialek" wrote in message
...

Uzytkownik "Jeff" napisal w wiadomosci
...

Microwave transmitters routinely use resonant devices other than coils
and
capacitors.

Yes. It was impossible to "make" the microwave frequency using coils.
Magnetrons are for it.

But are the modern radio waves (ham) transmitters without any coils?
S*


Generally they have coils, but NOT Tesla coils, it would be possible to
not use coils, but it not usual. (Depending on what you call a coil,
inductance would be a better word, as this can be generated in ways other
than what would normally be termed a 'coil'.)

A coil is made of a wire.
Are "magnetrons" or simmilar device for yours transmitters?
S*

Tesla coil
 

On 04/07/2012 10:35 PM, Howard K0ACF wrote:
Jeff is right, inductance would be the correct term but you want a coil made
of wire...Well what do you call a strip line used in VHF& UHF& beyond in
Ham Transmitters...I'm referring to a straight piece of wire (strip line)
that is not a coil& has no turns....Now you have your answer, it is
possible& is done with no coils...Howard K0ACF
"Szczepan wrote in message
...

Uzytkownik napisal w wiadomosci
...

Microwave transmitters routinely use resonant devices other than coils
and
capacitors.

Yes. It was impossible to "make" the microwave frequency using coils.
Magnetrons are for it.

But are the modern radio waves (ham) transmitters without any coils?
S*


Generally they have coils, but NOT Tesla coils, it would be possible to
not use coils, but it not usual. (Depending on what you call a coil,
inductance would be a better word, as this can be generated in ways other
than what would normally be termed a 'coil'.)

A coil is made of a wire.
Are "magnetrons" or simmilar device for yours transmitters?
S*




The word is inductor. At certain frequencies inductors take the form of
coils. At high UHF the inductors take the form of hairpins (aka Bobby
pins) a half of a loop.

Tesla lives in every old car with a distributor

Tesla coil
 

Many modern solid state transmitters have no "coils", per se, except perhaps in the output low pass filter or output matching network. The carrier is generated from a crystal oscillator (no coils, just caps and a hunk o' rock) and amplified in broadband stages.

Tesla coil
 

On 04/08/2012 09:55 AM, wrote:
Many modern solid state transmitters have no "coils", per se, except perhaps in the output low pass filter or output matching network. The carrier is generated from a crystal oscillator (no coils, just caps and a hunk o' rock) and amplified in broadband stages.



More like a switch mode power supply than a crystal oscillator, (the way
I visualize a modern AM transmitter without large coils.)

Tesla coil
 

"dave" napisal w wiadomosci
m...
On 04/08/2012 09:55 AM, wrote:
Many modern solid state transmitters have no "coils", per se, except
perhaps in the output low pass filter or output matching network. The
carrier is generated from a crystal oscillator (no coils, just caps and a
hunk o' rock) and amplified in broadband stages.


More like a switch mode power supply than a crystal oscillator, (the way I
visualize a modern AM transmitter without large coils.)

Are such used by radio amateurs?
S*

Tesla coil
 

Szczepan Bialek wrote:

"dave" napisal w wiadomosci
m...
On 04/08/2012 09:55 AM, wrote:
Many modern solid state transmitters have no "coils", per se, except
perhaps in the output low pass filter or output matching network. The
carrier is generated from a crystal oscillator (no coils, just caps and a
hunk o' rock) and amplified in broadband stages.


More like a switch mode power supply than a crystal oscillator, (the way I
visualize a modern AM transmitter without large coils.)

Are such used by radio amateurs?
S*

Since you haven't a clue what he is talking about, your question is
meaningless.

Most current, modern transmitters, amateur or otherwise, generate their
carrier frequency through digital frequency synthesizers referenced to
a crystal oscillator.

A small percentage of transmitters that are designed for either fixed
frequency use or use over a limited frequency range just use crystal
oscillators.

The output power is produced by amplifier stages to raise the level to the
desired output.

If there were no regulations, that would be the end of it, but since there
are regulations on spectral purity of transmitters, there are resonant
circuits somewhere before the antenna to ensure no spurious frequencies
are transmitted at a significant level.

Below microwave frequencies the resonant circuits are almost always made
of discreet inductors and capacitors forming either band pass or low pass
filters.

Tesla coil
 

Do you realize you are getting led down the garden path? I've been
following his participation (if you can call it that) in various discussions
for quite some time. I don't think he even as a license. He can almost
always be counted upon to totally disrupt an intelligent thread with
stupid questions and will continue to do so as long as he can suck
in a few responses.

Just ignore him for a while and he'll go away.

Irv VE6BP

wrote in message
...
Szczepan Bialek wrote:

"dave" napisal w wiadomosci
m...
On 04/08/2012 09:55 AM, wrote:
Many modern solid state transmitters have no "coils", per se, except
perhaps in the output low pass filter or output matching network. The
carrier is generated from a crystal oscillator (no coils, just caps and
a
hunk o' rock) and amplified in broadband stages.


More like a switch mode power supply than a crystal oscillator, (the way
I
visualize a modern AM transmitter without large coils.)

Are such used by radio amateurs?
S*

Since you haven't a clue what he is talking about, your question is
meaningless.

Most current, modern transmitters, amateur or otherwise, generate their
carrier frequency through digital frequency synthesizers referenced to
a crystal oscillator.

A small percentage of transmitters that are designed for either fixed
frequency use or use over a limited frequency range just use crystal
oscillators.

The output power is produced by amplifier stages to raise the level to the
desired output.

If there were no regulations, that would be the end of it, but since there
are regulations on spectral purity of transmitters, there are resonant
circuits somewhere before the antenna to ensure no spurious frequencies
are transmitted at a significant level.

Below microwave frequencies the resonant circuits are almost always made
of discreet inductors and capacitors forming either band pass or low pass
filters.

Tesla coil
 

Irv Finkleman wrote:
Do you realize you are getting led down the garden path? I've been
following his participation (if you can call it that) in various discussions
for quite some time. I don't think he even as a license. He can almost
always be counted upon to totally disrupt an intelligent thread with
stupid questions and will continue to do so as long as he can suck
in a few responses.

Just ignore him for a while and he'll go away.

Irv VE6BP

Not being led anywhere.

Our little babbling idiot spent a lot of time on the sci.phyics.* groups
where he was no better than he is here and his reception was a lot less
friendly.

He does not have a license of any kind and apparently not much of an
education of any kind other than skimming historical articles on Wiki.

His contact with the real world and every having seen any modern technology
of any kind also appears to be extremly limited.

Hi is obsessed with historical stuff, primarily dating from the pre-WWI
era.

He is incapable of understanding that any major historical player could
have possibly not fully understood everything and have published something
that later science has shown to be incorrect.

He can not understand that people like Maxwell, Tesla, Edison, etc. had
no access to things that are common today like oscilloscopes, time domain
reflectometers, spectrum analyzers, etc.

In summary, he is a babbling idiot.

The problem is most people when they first encounter him treat him like
an ernest newbee needing help instead of the fixated idiot he is.

Tesla coil
 

Thanks for the support. I was beginning to wonder if I was the
only one thinking of him that way. I don't like to think bad of
anyone, but this guy is just a pest! I hated to see others trying
to explain something to him knowing it would just go to waste.

Irv VE6BP

wrote in message
...
Irv Finkleman wrote:
Do you realize you are getting led down the garden path? I've been
following his participation (if you can call it that) in various
discussions
for quite some time. I don't think he even as a license. He can almost
always be counted upon to totally disrupt an intelligent thread with
stupid questions and will continue to do so as long as he can suck
in a few responses.

Just ignore him for a while and he'll go away.

Irv VE6BP

Not being led anywhere.

Our little babbling idiot spent a lot of time on the sci.phyics.* groups
where he was no better than he is here and his reception was a lot less
friendly.

He does not have a license of any kind and apparently not much of an
education of any kind other than skimming historical articles on Wiki.

His contact with the real world and every having seen any modern
technology
of any kind also appears to be extremly limited.

Hi is obsessed with historical stuff, primarily dating from the pre-WWI
era.

He is incapable of understanding that any major historical player could
have possibly not fully understood everything and have published something
that later science has shown to be incorrect.

He can not understand that people like Maxwell, Tesla, Edison, etc. had
no access to things that are common today like oscilloscopes, time domain
reflectometers, spectrum analyzers, etc.

In summary, he is a babbling idiot.

The problem is most people when they first encounter him treat him like
an ernest newbee needing help instead of the fixated idiot he is.

Tesla coil
 

"Irv Finkleman" wrote in message
...
Thanks for the support. I was beginning to wonder if I was the
only one thinking of him that way. I don't like to think bad of
anyone, but this guy is just a pest! I hated to see others trying
to explain something to him knowing it would just go to waste.

A few of us might recall another guy. I do
Remember his name, but actually mentioning
The name might conjure up his presence.

Usually, he offered some fancilful ideas with
No sound theories to back them up. Some were
Wacky and some were merely odd. He came
In here about twice a month. He has
Not been around for quite some time.

"Sal"
(KD6VKW)

Tesla coil
 

On 4/9/2012 4:03 AM, Szczepan Bialek wrote:
napisal w wiadomosci
m...
On 04/08/2012 09:55 AM, wrote:
Many modern solid state transmitters have no "coils", per se, except
perhaps in the output low pass filter or output matching network. The
carrier is generated from a crystal oscillator (no coils, just caps and a
hunk o' rock) and amplified in broadband stages.


More like a switch mode power supply than a crystal oscillator, (the way I
visualize a modern AM transmitter without large coils.)

Are such used by radio amateurs?
S*

Tesla coil
 

On 4/9/2012 4:03 AM, Szczepan Bialek wrote:
napisal w wiadomosci
m...
On 04/08/2012 09:55 AM, wrote:
Many modern solid state transmitters have no "coils", per se, except
perhaps in the output low pass filter or output matching network. The
carrier is generated from a crystal oscillator (no coils, just caps and a
hunk o' rock) and amplified in broadband stages.


More like a switch mode power supply than a crystal oscillator, (the way I
visualize a modern AM transmitter without large coils.)

Are such used by radio amateurs?
S*



Why don't you tell us? You are the expert. Google and Wikipedia are
your friend.

tom
K0TAR

Tesla coil
 

"Irv Finkleman" napisa³ w wiadomo¶ci
...
Do you realize you are getting led down the garden path? I've been
following his participation (if you can call it that) in various
discussions
for quite some time. I don't think he even as a license.

A few days ago i wrote:
" I have never seen a transmitter (even that in a mobile phone).
S*

He can almost
always be counted upon to totally disrupt an intelligent thread with
stupid questions and will continue to do so as long as he can suck
in a few responses.

I asked:
"Tesla coil circuits were used commercially in sparkgap radio transmitters
for wireless telegraphy until the 1920s,[1"
From: http://en.wikipedia.org/wiki/DRSSTC

But in 1929 was wrote: "It is not generally appreciated that this curious
apparatus, often associated with pretty or spectacular demonstrations of
high voltage electricity, is really a fundamental part of modern radio. For
all the tuning apparatus and circuits in every transmitting and receiving
set are simply variations of Tesla coils and Tesla coil circuits".
From: http://www.tfcbooks.com/tesla/1929-09-22.htm

Now is 2012. Is " this curious apparatus" the "fundamental part of modern
radio"? Of course in form of the " variations of Tesla coils and Tesla
coil circuits".
S* "

Now I know the opinions of radio amateurs.

Just ignore him for a while and he'll go away.

Sometimes I must ask the experts.
What is wrong in that?
S*

Tesla coil
 

On Apr 9, 1:00*pm, wrote:
He can not understand that people like Maxwell, Tesla, Edison, etc. had
no access to things that are common today like oscilloscopes, time domain
reflectometers, spectrum analyzers, etc.

Not to mention modern quantum electrodynamics theory.
--
73, Cecil, w5dxp.com

Tesla coil
 

Szczepan Bialek wrote:


Now is 2012. Is " this curious apparatus" the "fundamental part of modern
radio"? Of course in form of the " variations of Tesla coils and Tesla
coil circuits".
S* "

Asked and answered.

NO.

Tesla coils have not been part of ANY transmitter built since before WWII.

Tesla coils have not been part of ANY transmitter built since before WWII.

Tesla coils have not been part of ANY transmitter built since before WWII.

Sometimes I must ask the experts.
What is wrong in that?
S*

You are a babbling idiot and can't understand a simple answer even if it
is spoon fed to you.