Liquid nitrogen cooled cables, no joke!

[Privateer]

This is a first for me.

 

[jaxvon]

HAHAHAHA
AHAHAHAHA
AHAHAHAHA


I actually had that idea awhile ago, of using super conductors cooled with liquid nitrogen for the "ultimate cable". I guess someone actually did that.

All I can say is "Wow". What a waste of money. Sure looks cool though.

 

[mtrycrafts]

HAHAHAHA
AHAHAHAHA
AHAHAHAHA


I actually had that idea awhile ago, of using super conductors cooled with liquid nitrogen for the "ultimate cable". I guess someone actually did that.

All I can say is "Wow". What a waste of money. Sure looks cool though.

Well, just when you need Jneutron, the man in the know about superconductors, he is absent.
But, I doubt these will qualify? How cold you think it gets?
All it meas is that short piece of wire will be less resistive

 

[jaxvon]

Anyone know what kind of speakers those are? I see a Meridian CD player and Krell preamps and Amps.

 

[jneutron]

Well, just when you need Jneutron, the man in the know about superconductors, he is absent.

He is? Guess he needs to be flogged.

But, I doubt these will qualify? How cold you think it gets?

Best that can be hoped for is 77 K. At that temp, copper will be about 8 times more conductive than it is at room temp.

77 K is the temperature of liquid nitrogen at room pressure when it boils off. Of course, that is only an approximation, as the barometric pressure range will affect the actual temp by about 200 millikelvin..sloppy, sloppy

What confuses me in the picture:

1. I do not see any kind of safety vent on the dewar. This is typically a burst type membrane, which fails destructively should overpressure occur. This can happen when ice forms on the vent, either water ice or dry ice (solid carbon dioxide). (oxygen solidifies at 54 K, so is not an issue). Vents are required, as there is always heat leakage into the dewar and lines, boiloff carries that heat away.

2. I also note that there is no ice at the transition area, where the wires come out of the cable. Given the physical size of that transition, any real metal would be suckin the liquid big time there, where the copper wire goes from room to cold.. So, the question is, what is the real temp of the inner conductors?? Is this setup really there to support cooling of the conductors, or is it simply to provide nitrogen as the dielectric material for the cable?. I suspect it is simply a dielectric scheme, and the dewar is simply to keep the lines charged.

3. I do not see any ODH monitors in the picture..so how does one know that there is enough room oxygen to support human life should a leak occur? The safety people here would have hogtied the designer of this setup.

HTS will trivially handle the currents if they are at 77K, the smallest supers I can get on the open market will be about 150 to 200 amps at zero field.

But, the hysteresis loss at audio frequencies are not to be believed..that is why the tape manu's are working to create stripe based superconducting tapes for 60 hz power transmission..

Too many things wrong with the picture to be superconducting..course, whadda I know...maybe they've scooped all the cryogenic people...

Cheers, John

 

[Tom Andry]

Help for the masses

For those of you a bit lost by the above post, here is a glossary of terms:

K – Kelvin – Kelvin was this guy who kicked my butt in high school. The number in front of the K indicates the number of punches until I reach unconsciousness

Millikelvin – Kelvin’s little brother – also can kick my butt

Dewar – a type of cheap blended scotch

Dielectric – two electrics particles

Dielectric scheme – two electric particles’ plan of escape

ODH monitors – outrageously expensive plasma TV’s capable of 3D imagery. No, you can’t see them, and no you can’t afford them. They weigh about a billion pounds and are powered solely by vacuum tubes so you can’t even be in the same room with them as the entire set gets hot enough to burn a hole in the sun

Hogtied – a method of restraining hogs…or a super secret sexual position…I’m not sure

HTS – Definitely the latter of the above definition

150 to 200 amps at zero field – either a very large or very small amount, I’m not sure

Hysteresis – What happens to my wife when I purchase new audio equipment without her express written permission

Tape manu's are working to create stripe based superconducting tapes for 60 hz power transmission – now he’s just making stuff up.

Cryogenic people – super rich people that think if they give someone outrageous amounts of money to freeze their bodies in hopes of a “cure” that they won’t just be given to the local community college 15 minutes after the check clears.

 

[Audioholics]

...can't breathe... laughing too hard...

 

[jneutron]

That is by far, the funniest post I have seen on this site.

It is now printed and posted on the board in the lobby.

I also cannot breath..

Thanks


John

PS. In retrospect, now I'm just angry..cause my stomach hurts too much.

 

[Spiffyfast]

Dangit Takeereasy, someone beat us to the market

 

[JohnA]

Hahahaha.....

 

[patnshan]

 

[Resident Loser]

The funniest part...

...is that all the audio is actually being provided by a Bose Waveradio...

jimHJJ(...and how cool is that?...)

 

[jneutron]

 

[Swerd]

What confuses me in the picture:

1. I do not see any kind of safety vent on the dewar...

2. I also note that there is no ice at the transition area, where the wires come out of the cable. Given the physical size of that transition, any real metal would be suckin the liquid big time there, where the copper wire goes from room to cold...

3. I do not see any ODH monitors in the picture..so how does one know that there is enough room oxygen to support human life should a leak occur?

It confuses me too. Considering the small size of the dewar (liquid nitrogen tank, for those of us not in the know), the only conclusion I can make is that this setup was for visual effects only and did not contain any liquid nitrogen at all.

jneutron's point #2 is the biggest one. Liquid nitrogen is cold enough (77°K = -196°C = -321°F) to generate plenty of frost in areas where there is little or no insulation. See the two wires (in the red box) where they emerge from the thick jacket. There ain't no frost on 'em! With an empty dewar, no safety vents or low oxygen monitors are required.

 

[Audioholics]

It's likely similar to the batteries that form an incomplete circuit on those AudioQuest cables (hey, THAT'S why they never run out!) - the Nitrogen probably never leaves the tank - but its mere presence makes the cables better.

 

[Tom Andry]

its mere presence makes the cables better

That gives me a great idea. What we need are cable coaches! They could give your cables moral support, yell encouragement, train them in the ways of the chocolaty midranges, call foul when a power cord gets too close...

You may have to bump the volume up to hear the music over all the screaming and chair throwing, but I bet your system sounds SIGNIFICANTLY better. Oh, and I charge by the hour

 

[Tsunamii]

I had a hard enough time convincing the wife about the SVS sub in the corner never mind the nitro tank lol...

 

[patnshan]

It's a guy bouncing up and down pointing and laughing at the guy with the nitrogen cooled cables. Geez.....

Pat

 

[jneutron]

It's a guy bouncing up and down pointing and laughing at the guy with the nitrogen cooled cables. Geez.....
Pat

Ah, ok..

You posted it under John A, so I was thinkin he was the owner of da cables.....ya never know what PE is gonna sell next...

Actually, as I stated, I believe they are simply nitrogen filled conductors. The visuals do not support cold conductors..

Geeze, if anyone's gonna go to all that trouble lowering the effective DC of the insulation, why end the darn thing by exiting through metal, and putting the wires about an inch apart??? All that's gonna do is raise the inductance..


Cheers, John

 

[mtrycrafts]

John

PS. In retrospect, now I'm just angry..cause my stomach hurts too much.

Yes, and it is all your fault After all, he did comment on your post