Thanks, fascinating... That must be the most interesting thing I've read in here for ages... you should start your own blog!!
Ah - got it now. The cable has to be 1/4 wave of 50Hz in the air, as the kit that needs it is so badly designed it creates a colossal audible hum which vibrates the mains cable to just the right shape to reduce the hum loop...
They are still using the last one. We ship the next one in about three weeks. Assembling all the different coils very soon, finishing up the wiring this week.
CERN will be shutting down for a two year timeframe for upgrades, so they are in a rush to do more science.
Jn
That sounds even too geeky for me..
Way back in the day I worked for a diode manu. To speed up reverse recovery, we would diffuse in either gold or platinum. It would cause lattice defects in the silicon, so charge carriers would recombine quickly, as the other mechanism was sweeping them out by the voltage. Radiation, ion implantation was another way of causing defects, but frowned upon as the diode could partially recover and slow down. Also, all the techniques increased vf and reverse leakage.
The diodes that failed were one inch from the heavy ion beam, so bremsstrahlung radiation would hit the edge of the diode closest to the beam the hardest. It was an inch away, the other edge was four inches away so saw less damage.
Eventually, the less damaged lower vf side would shrink to the point where the current density was too much and it would melt.
Failures cost in excess of 10 million dollars. So we try to avoid that.
Jn
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So in general it will depend on the impedances of the wall outlet, the impedance of the "line cord" and the impedance of the device connected to the "line cord" if and at what frequencies a "reasonable amount" of attenuation is available.
Further in the case of more specialised cables, covered with absorptive material so transforming field energy to heat, there will be attenuation available that rises with frequency and length of the cable, therefore qualifies as a filter element.
Why, we make our own of course..
You've no idea how difficult it is braiding three pieces of 535 kcmil wire, nor crimping all three into an IEC female.
Plus, we end up duct taping the equipment to the benches because the cables pull them off. One guy dropped a line cord on his foot, he wasn't wearing his steel toe shoes, they managed to put his foot back together, we call him gimp now.
Jn
Odd how the nanovoltmeter even comes with a stock cord.
They do come up with weird stuff to do. With the last one, they verified that anti hydrogen has the same transition spectra as hydrogen, to I think 12 decimal places, using laser spectroscopy.I do hope that experiment works. No idea what it would mean to physics to find out which way gravity works on antimatter but just astounding that they are even trying to measure it.
I read the paper, it was really easy to follow...until about the third word in the first paragraph.
Really, is this English.???
I will always cherish being given credit in one of their write ups..."photo courtesy of"...
Jn
https://www.audioquest.com/cables/ac-power-cables/storm-series/thunder-high-current
Some of the cr@p from this website;
Alternating Current (AC), is a far-from-perfect power source. AC power technology is well over a century old and was never designed to meet the exacting standards of today’s high resolution audio-video components. AC noise is present at the utility source, and is then exacerbated by radio frequency noise that is induced (picked up by the AC power cord) and coupled to the component power supplies and to circuit ground. This creates distortion and low-level signal losses via the “masking effect.” Further, power amplifiers can require immense reserves of transient current for their power supplies to react to and then stabilize during dynamic audio passages. Most AC power cords and power conditioner-regenerators, though helpful to a point, are simply not up to the task.
Power amplifiers present a real challenge for any AC power source, as the transient current requirements (though short in duration) can be many times that of the average (RMS) current consumption. Power amplifiers are also unique from all other components in that the current draw is dynamic, not constant, and it changes with volume and audio signal content. Though many AC power cords may feature low DC resistance to allow for some of this requirement, the characteristic impedance of the AC cable is equally responsible for assuring uncompromised performance. Many premium AC cords constrict or compress the audio transient as their characteristic impedance restricts the transient current.
Who writes this nonsense?
Once again, when it comes to the audio your BS detection level is set very, very high.
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