@jneutron & PMA,
this was the more interesting part of the publication (attached pdf), interesting graph on page 2, the measurement was done (according to the description) by using a R&S noise generator signal mixed in a power combiner with a 10 Mhz sinus signal.
Level of the 10 Mhz sinus remained unchanged while the noise floor dropped.
(Source: German "Studio Magazin")
this was the more interesting part of the publication (attached pdf), interesting graph on page 2, the measurement was done (according to the description) by using a R&S noise generator signal mixed in a power combiner with a 10 Mhz sinus signal.
Level of the 10 Mhz sinus remained unchanged while the noise floor dropped.
(Source: German "Studio Magazin")
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My initial problem with this remains, you can't possibly maintain a broadband match terminated system (as any measurement with a 50 Ohm analyzer and power combiner would require) with something like a Bybee without extreme care.
Thank you. Downloaded and I will go thru. I assume I have already seen it before, but had some reservations and gave it away. Anyway, I will read it again. R + jwL?
Of course and unfortunately a picture is missing from the baseline measurement without the coaxial test fixture he mentioned in the article (and a pic of this test fixture is missing as well).
Basically this guy should/could know about the care needed to do such measurements, but who knows;therefore i hoped that somebody else could replicate the measurment. Unfortunately i don´t have such a high quality noise source at hand......
The RF impedance of the Bybee must be fully characterized out to >10MHz and this must be accounted for. In any case what on earth does this have to do with the claimed magical 1/f noise removal properties, needless to say much easier to do. Perhaps they showed nothing?
I think I said this before, someone holding in their hands possible proof of reversal of entropy and refutation of the second law and they just move along like its nothing.
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A schematic of the test setups would ahve been nice.
I noted on page 1 the peak at 30 hz. What would be causing a 30 hz signal?
As to noise floor. 100 db down, and a very large thing inserted into a power supply chassis? Just the physical alterations to accomodate that thing would change the noise floor 100 db down.
You can't just throw a piece of test equipment into the fray if you throw out all normal wiring layout rules, especially at these levels and frequencies.
We have absolutely no way to know if what they did is even valid, it's just a mess of a technical article.
I would have loved to see the actual test layout they used. Otherwise, it's pretty much useless.
jn
OK, went thru. I have quite big troubles with the article. Introductory part of the article, written by audio publisher, is a pure pseudo-science. Then there are comments of measuring engineer. No differences in audio band, differences start above 3MHz. No wonder, if we see the construction, it must be doing "something" above MHz band. The construction is improper, if they wanted to filter UHF noise it should be covered in a metal case designed according to HF design rules and provided with HF connectors like SMA. As shown, and measured, it is a hoax to me.
BTW, this was not the best example, I explain..
A shorted former would buck the vc field big time as a shorted secondary. So it was not the best example. The conductivity of the aluminum by itself will do exactly what I stated, act as a magnetic brake with no back emf.. If the former is continuous, it will buck movement of the coil in the gap as a result of attempts to change it's inductive environment.
Sorry for the mixup..however, it doesn't alter my statements.
jn
A shorted former would buck the vc field big time as a shorted secondary. So it was not the best example. The conductivity of the aluminum by itself will do exactly what I stated, act as a magnetic brake with no back emf.. If the former is continuous, it will buck movement of the coil in the gap as a result of attempts to change it's inductive environment.
Sorry for the mixup..however, it doesn't alter my statements.
jn
I do not thing so, because it is not designed and connected to operate in GHz range. The way it is done is usable <<1MHz.
I did a google translation for your pleasure: "" The contribution of our sound engineer colleague Holger Siedler in the last issue As expected, has some 'defense reactions' triggered in the readership, because, as we know, can not to be what can not be. We would have with nothing else than our listening experience, our honest intentions and our over decades worked out editorial credibility can argue if not us the coincidence the results of a metrological Investigation of an independent, based in Ganderkesee, metrological institute, the Gecom Technologies GmbH, in the hands would have played. Gecom (www.gecomtechnologies.com) is a service company that exists since 1992 and in the fields of metrology, electromagnetic Shielding (EMS) and high-end audio is operating. The latter was also the reason own initiative Bybee Quantum Purifier metrologically to investigate. The responsible measurement engineer Stephan Goetze sums up his results in this article and findings together. The measuring session was using the following gauges carried out: Rohde & Schwarz ZVC Networkanalyzer, Rohde & Schwarz FSE Spectrum Analyzer, Rohde & Schwarz UPD Audio Analyzer, Rohde & Schwarz SUF 2 noise generator, HP 4194A Impedance Analyzer and HP 4192A Impedance Analyzer (The Editors). measurements During the inception check it was found that the connection lines of the 'Small Slipstream Quantum Purifiers' Magnetic are, but not the, Large Quantum Purifiers'. The actual body both specimens are not magnetic. A Metrological detection took shape quite difficult, because in the audio area no significant differences to one the same piece of wire. Only when the measurements in higher frequency ranges were expanded metrological Differences. As part of the Measurement with impedance analyzer is at pictured plot to note that it is is a logarithmic frequency scale. The provided with a marker circle The curve comes from the Small Slipstream Quantum Purifier, the corresponding ones Curves without markers of the same length Piece of wire. Below three megahertz are no noticeable differences. From 3 MHz, however, you can see a different one Behavior in the imaginary and real part - The Small Slipstream Quantum Purifier shows an inductive behavior, similar like a ferrite core pushed onto a wire. After this measurement is from a Suppression of very high frequency signals to go out and from no change in the audio section. For the measurement with vector analyzer became a small Slipstream Quantum Purifier in a coaxial testing device built-in. To the Comparison was without this Test device only the signal path measured. In each case the dark blue curve is the one with the Small Quantum Purifier populated Testing device while the green curve is the pure cable connection represents. In Transmission direction (S21, upper window), you see, that an attenuation starts at around 3 GHz. The lower window represents the reflection of the test piece. To put it simply: The closer this curve is to 0 dB is, the worse the adjustment and the more energy gets back into the source reflected. This measurement corresponds good with the previous one Impedance measurement: Only in the low frequency range is a small one Reflection (about -45 dB) to approx. 3 MHz available, from there on the reflection clearly on - that is, possibly existing on a cable Disruptions become performance-related reflected back. What is the use of high-frequency attenuation? Signals for the low frequency Audio range? Do you have two or more high-frequency signals in a nonlinear Transmission link, for example in one Amplifiers, but also in connector transitions, so can be called intermodulation occur. These are mixed products two frequencies. Are the fundamental frequencies f1 and f2, so are by intermodulation also f1 + f2 or f1-f2 as well n x f1 + m x f2 (n, m = integer) is generated. Create two interferers with 10 kHz spacing thus also disturbances in the audio range. Exactly these disturbances are reduced by the Small Slipstream Quantum Purifier. This theoretical Approach is clearly also metrological detectable. For the first measurement became a symmetric XLR cable, of course shielded, used. Once without a small one Slipstream Quantum Purifier, once with each a small slipstream quantum purifier in the signal wires, so a total of two. Measured was directly from the generator output on the analyzer input of Rohde & Schwarz UPD audio analyzer. There were none Filter turned on, bringing a measurement bandwidth given by 300 kHz. Measured became THD + noise, the sum of all Distortions + noise. The upper blue Curve is without the Small Slipstream Quantum Purifiers, the lower curve with these measured. You can do a low, but demonstrable improvement. This is quite audible! Measurements on Large Quantum Purifier The impedance measurement gave very similar results Results. Because of the physical Size of the Large Quantum Purifiers was one Measurement in a coaxial test device not possible. To document the effect, became another measurement setup selected: As signal source served Rohde & Schwarz SUF 2 noise generator, the broadband Noise up 50 MHz produced. This signal was with a 10 MHz sine wave Signal with a Power Combiner mixed. The result without Large Quantum Purifier is the upper blue curve, with Large Quantum Purifier the lower green curve. The 10 MHz signal is in both cases equal in level, so it is not attenuated. The noise floor is around 10 dB lowered. Such a big difference very noticeable in the audio field. Complementing were the Quantum Purifiers also acoustically tested at our reference system. The Small Slipstrem Quantum Purifiers were in the XLR cable between DA converter and precursor installed, the Large Quantum Purifiers were in front of the crossover of the mid / high part set (semi-active System). The results corresponded whatever else you do on and in relevant Websites and forums find: The space improved in width and depth, there were more fine details audible, instruments were clearer in the room defined, without any losses in the Had a dynamic. In metrology is an application in electrometers and high accuracy digital multimeters on. Again, more stable results were obtained achieved with less interference.""
Why didn't they replace the QP with an inductor with the same R and L and do the THD-N again. This would have been educational I think.
Did the QP and the piece of wire have the same Z in the audio band? - it was unclear to me. If yes, indeed the QP has magical powers - if No - was any level difference compensated for?
1dB is a lot.
//
Did the QP and the piece of wire have the same Z in the audio band? - it was unclear to me. If yes, indeed the QP has magical powers - if No - was any level difference compensated for?
1dB is a lot.
//
My wife and I were chatting to an old friend of ours who we haven't seen in years. Her son got his PhD. I asked her what was it in? She said 'some fancy stuff - I have no clue. Only thing I recognized was his name. '
Turns out, his PhD is in theoretical physics (thermal properties of quantum matter from holography) and he's . . . done a crash course in programming and joined a financial outfit in London as a 'Python Data Scientist'.
My son has a Swedish friend who has a PhD in Mathematics and works in banking in London as well, specifically doing risk assessments on 'tax minimization strategies' which I take it to mean 'how far can we push the boat out' or something like that.
Science doesn't pay unfortunately . . . and then we wonder why the world is the way it is.
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I know of a few software-heavy PhD in EE's to get swallowed up by a finances company. One was doing some machine learning fraud/laundering detection schemes if I remember correctly.
But most of my Ph.D EE friends went more "traditional" EE routes, aka to industry to work at tech or at least program/project manager positions. A few of us are confused and gluttons for punishment, so stayed in academia for longer. I'm coming around to this. Pretty sure it's time for me to get a big boy job, even if I have a save-the-world complex (low cost medical diagnostics) that will mean I need to look for jobs with the outfits that the Gates Foundation /Oxfam/etc are investing in. But I'd certainly like to get paid better than 80% of a wet-behind-the-ears, just finished BSEE starting pay with my skills and experience. Academia is terrible for pay, even though it has a good set of advantages, too.
*I apologize if this sounds arrogant, I certainly am writing this unfiltered rather than self-aggrandizing.
But most of my Ph.D EE friends went more "traditional" EE routes, aka to industry to work at tech or at least program/project manager positions. A few of us are confused and gluttons for punishment, so stayed in academia for longer. I'm coming around to this. Pretty sure it's time for me to get a big boy job, even if I have a save-the-world complex (low cost medical diagnostics) that will mean I need to look for jobs with the outfits that the Gates Foundation /Oxfam/etc are investing in. But I'd certainly like to get paid better than 80% of a wet-behind-the-ears, just finished BSEE starting pay with my skills and experience. Academia is terrible for pay, even though it has a good set of advantages, too.
*I apologize if this sounds arrogant, I certainly am writing this unfiltered rather than self-aggrandizing.
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Same here, paid 6 figures to shave microseconds off of electronic transactions. OTOH I have a friend with a brother deeply involved in the grid that claims there are power centers with Win 3.0 computers deathly afraid to take them down for upgrade (there are no longer any viruses that apply).
Ha! I remember the revolution PLCs introduced to the hard wired relay-based automation in general industry.
The PLCs were DOS based (ladder logic) and plants were running smoothly for a few years.
When the 3-4 big PLC manufacturers decided to turn to Windows 3.0, it turned into chaos.
George
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