I recently proposed an ultimate audio rack. A case with isolated cabinets for each component built from 1" aluminum stock with interlocking RF joints at all seams and heavy RF gaskets at the doors. The whole thing could be suspended to reduce the impact of vibration. It would be heavy enough to resist all but the most substantial vibration. All the internal connections would be through feedthroughs to prevent EMI from penetrating any of the shielded sections. A remote solution could be easily applied to control the devices inside. But then I realized that it would never sell- you can't see the precious objects inside.
This is the basis of the idea: http://cp.literature.agilent.com/litweb/pdf/N9360-90704.pdf
This is the basis of the idea: http://cp.literature.agilent.com/litweb/pdf/N9360-90704.pdf
I posted the difference between an aluminum and steel chassis. I found the results very interesting. The only advantage the steel had was on the AC line fundamental. But it also clearly showed how to reduce the radiated fundamental field so that the aluminum worked as well as the steel.
Yes, thanks, I did more reading and found that out.
Also it looks like no provision for running multiple tone tests ala Jon Risch.
Sort of limits it's ultimate usefulness !.
Dan.
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That the aluminum handles everything above the fundamental and if you load a typical transformer even a small bit the leakage flux drops off an amazing amount.
Loading can be done by a magnetic shunt or just a resistor on the secondary. The resistor has two other advantages and one disadvantage. Dick I have no doubt from your work you understand the issue, so lets see who else will venture a guess.
That the aluminum handles everything above the fundamental and if you load a typical transformer even a small bit the leakage flux drops off an amazing amount.
Loading can be done by a magnetic shunt or just a resistor on the secondary. The resistor has two other advantages and one disadvantage. Dick I have no doubt from your work you understand the issue, so lets see who else will venture a guess.
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One advantage is that the resistor will damp the tank circuit from the transformer inductance-Rectifier junction capacitance. It may be best to put a small cap in series with it to limit dissipation though.
John, you posted a talk, I commented on the talk, you have typically gotten all emotional and applied it to his whole career. get a grip please ...
That dichotomy is visible at RMAF, which is typically an audio show with 'technical workshops'. In that light, trying to straddle both camps is pretty impossible. Johnson clearly tried his best. The talk by ESS's Eng VP on their Sabre DAC a few years back was also trying to strike a balance. You always run the risk that each camp feels short-changed.
jan
Isn't that called a Vault ? (-Fault)
The times they are a-changing ? I recall worship of a DMA-100 going to Klingon warp speed : Caou-Tchouc (French rubber)
Are you insinuating that audio designers/manufacturers and their work can actually be judged objectively?... 😱
Many would have to find other ways to make a living, so their fierce objections on such a stance are more than justified.
What is more interesting is the hobbyist angle, as the above suggests that our systems can be objectively evaluated as well. One would think that this would be a welcome change for the hobbyists. I mean, all car geeks would love to get free horsepower measurements and test lap runs on their tweaked rides, all computer geeks waste time on benchmarks, all home-cinema geeks would love to have free calibrations of their projectors; you get the idea....
Instead, audiophiles seem to have a vested interest to fight the... solid, fixed goalposts as well. And they do.
You see, with fixed goalposts, some systems will be proven decent, some will be proven great and other will be proven awful, if not defective.
Some will have to face the fact that they have invested $$$$ to get rubbish.
Some will be winners and some will be losers.
But, as we are all told nowadays, younglings are not supposed to play games with winners and losers (lest it forever scars their sensitive souls etc etc).
And there is no child more sensitive than a big boy with expensive toys. 😉
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Mercedes-Benz SLS AMG Coupe electric Drive, 560kW 1000Nm instantaneous torque, all wheel drive. speed is limited/governed at 250km/h. cracks 8min on the Nurburgring last week check it out coming onto and on the straight at 6:50 onwards, sure looks like its got a fair bit left in the tank if it wasnt for the limiter. looks like he engages some sort of boost just going onto the straight, or maybe aero kit
This one isnt a concept car, its actually available. not sure of the price.
but the 0-100km/h isnt really any faster than the tesla model S 7 seat saloon. looks to handle better and sounds better, but still sounds odd. dunno what the range is.
Audi R8 and the new Honda NSX due in 2015 are also adding EV
This one isnt a concept car, its actually available. not sure of the price.
but the 0-100km/h isnt really any faster than the tesla model S 7 seat saloon. looks to handle better and sounds better, but still sounds odd. dunno what the range is.
Audi R8 and the new Honda NSX due in 2015 are also adding EV
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You need to go differential..double up on the bannanas.
And everytime I explain why, folks forget..
The ear reacts to the energy by reducing it's sensitivity. Background noise reduces when the ultrasonics are on. Use sufficient energy, this will be very noticeable. As well as dangerous to your hearing. When I did the experiments, OSHA did not have limits or guidelines for ultrasonic exposure.
I reported seeing the video on you tube. 😉
Agreed. And not necessarily far field rf, but rather, near field induction.
Hmmm...line cords...go figure. perchance, is it consistent with what I posted back in 2004?
jn
Unfortunately it costs $550k (416k euros) and posts a ring time similar to an E92 M3, which costs $55k base and came out 5 years ago.
The insurance companies will dictate a bye-bye charge cord, only available at selected distributors.
(Average intelligence law of the screen actors guild dictates that one forgets that a tattooed horseshoe only points up 2/3d of the time. SY must have caught her at an unlucky/horizontal moment)
whats the damage on the gas version of the same car? surely thats a more valid price comparison, also as mentioned, its limited by law to 250km/h because its the production version. its also 1000lb heavier than the gas version, due to the battery I guess.
so, weve established that ECI are quicker, for now. I thought that was established some 20 pages ago ... you'll excuse me for saying that its not a revelation, or news to the manufacturer (or myself ...) pretty sure you could get around there quicker than both of them on a 5K motorbike (OK maybe 10K)
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