0 Members and 1 Guest are viewing this topic.
Tesla must have had a fantastic publicist. His name continues to come up in lots of examples and the myth of the superiority of his ground shattering inventions lives on. He did some good stuff, no doubt, but his name seems to be revered out of all proportion. I wonder why.
What new gases? How do they help a turbine perform better?
""Well, he did more or less invent electrical engineering as we know it; AC power transmission,""NO HE DIDN'T. British John Hopkinson had devised 3 phase AC before Tesla had even arrived in the USA.
I find the claims that Tesla invented X Y an Z farsical like a radio controlled boat in 1896 when the components needed to do it didn't exist.
We will have to agree to disagree.Have to remember in 1898 all they had was spark gaps and coherers. How could you have proportional control??
Unless you or someone can explain in detail how it could be done when the components and techniques needed didn't exist I will continue to think it is all sham.
The Tesla turbine seems simple.....What do you think? What is the great benefit if there is one?
Quote from: Karsten on 30/05/2009 18:35:43The Tesla turbine seems simple.....What do you think? What is the great benefit if there is one?Well there is this (NSFW)!!!!:http://ladycartoonist.com/archives/34
wolfekeeper:The spark transmitter.How would Tesla have measured the "High Q" of his resonator if he hadn't access to cw oscillators?
If you don't use an active device (valve etc) and a good filter / matching sircuit I can't see how you would get narrow bandwidth plus reasonable power out of a transmitter.
What was the state of filter design in those days?
The maximum frequency used for his experiments would have had to be in the order of hundreds of kHz.
You'd be lucky to get more than a couple of channels to work over a useful distance without mututal interference problems.
Tesla was the state of filter design in those days!
Efficiency isn't all that counts - it's actual Power! He didn't have many hundreds of Watts of DC available (ok, perhaps 1kW) and the 'coherer', which was all they had as a detector, was pretty insensitive. The only thing in his favour would have been the lack of other transmitters to interfere with his experiments.Measuring Q: Yeah but if you haven't worked out the effect Radiation Resistance if the antenna, how can you tell what the resistance (gives Q) is? You can't just measure the DC resistance - that's an entirely different thing. Even now, you have to do it numerically for RF inductors.
Sorry, but, techincally, you are into the realms of farmyard products. To "RF with a "meter" you need a diode - did he have thermionic diodes? No. He had to use a coherer.
QuoteTesla was the state of filter design in those days!That's not an answer. I was interested to know what the actual state of knowledge was. Filter theory is actually quite a recent development. (First World War ish)
Why does he have to have been a superman? Don't make out he had done everything. Get him into perspective.
You see, as he wouldn't have had access to a signal generator, he would need to have been using narrow band filtered spark signals (effectively, noise)
to explore the characteristic of his wider band filter. Personally, I can't see that he would have had any accurate idea of the Qs involved.
An how do you suppose Mr Tesla would have measured the "impulse response"?
In fact, he used continuous sparks, didn't he?
That is a very rough type of noise.
I am not sure whether you appreciate what Q means. It represents the rate of power loss compared with the reactive power in the circuit.