0V reference

[Tim Williams]

Even marine-grade stainless steel is stainless by virtue of a thin and
cohernet layer of chromium oxide - I don't know which one - which has
an appreciable electrical resistance.

Cr2O3. CrO isn't very stable in air (though Cr3O4 might be, I'm not sure),
CrO2 takes work to make I think, and CrO3 is rather reactive, not to mention
carcinogenic. ;-)

But it's not so much the Cr2O3 as it is the three-way alloy that has so much
bulk resistance. All those weird atoms really break up the electron flow.
(Typical stainless is 10-20% Cr, 5-10% Ni, balance Fe, with smaller amounts
of Mn, Si, C, and impurities of S, P, etc.)

Tim

 

[Robert Baer]

For your quoted 0.0000V reference at 1A the resistor needs to be <100 micro
ohms. -- but is in conflict with your required 100% accuracy.

Ideally you need a 1 * 10 ^(-(infinity -1)) femto ohm resistor and an
(infinity - 1) Farad capacitor.

BTW - Do you know what the capacitance is between two pinheads 1 light year
apart?

Slurp

Are you referring to the capacity of the brain that is there?

 

[Robert Baer]

0V relative to what?

My uncle.

 

[Fred Bear]

Thankyou all for such a good response. I'm now using a 0 ohm resistor to
ground with a 0 uF capacitor to the 0V rail and getting very good results.
Again, thanks for all the very informative assistance.

Fred Bear

 

[Rich Grise]

Thankyou all for such a good response. I'm now using a 0 ohm resistor to
ground with a 0 uF capacitor to the 0V rail and getting very good results.
Again, thanks for all the very informative assistance.

Fred Bear

Oh, foo! Got an answer already? I was going to do the obvious one:


+----- 0V
|
|

 

[Joerg]

Hello Spehro,

How pure? Gold-copper doesn't have much thermocouple voltage, but a
couple tenths of a degree C would be enough to swamp 100nV. Galvanic
action might be possible too.

Of course the advantage of selling such a 'reference' to
unsophisticated customers would be that few would be able to test it
sufficiently accurately to complain.

Probably. In Europe they offered devices called "Atomstromseparator" to
greenies, who of course had to part with oodles of cash to get one.
These were claimed to separate the power coming along the mains line and
reject any that was generated at a nuclear power station ))

I bet the profit margins were somewhere north of 99.9%. Don't remember
if they came with a complimentary tin foil hat or whether that cost extra.

Regards, Joerg

 

[Spehro Pefhany]

Hello Spehro,


Probably. In Europe they offered devices called "Atomstromseparator" to
greenies, who of course had to part with oodles of cash to get one.
These were claimed to separate the power coming along the mains line and
reject any that was generated at a nuclear power station ))

I bet the profit margins were somewhere north of 99.9%. Don't remember
if they came with a complimentary tin foil hat or whether that cost extra.

The Wikipedia article on it seems to say it was intended as a joke
('Scherz')... but it's in German so I'm depending on a bad machine
translation.

http://de.wikipedia.org/wiki/Atomstromfilter


Best regards,
Spehro Pefhany

 

[Joerg]

Hello Spehro,

The Wikipedia article on it seems to say it was intended as a joke
('Scherz')... but it's in German so I'm depending on a bad machine
translation.

It says "zumeist als Scherz", meaning "mostly as a joke". I remember
reading ads for that stuff in papers and stories about people who
actually fell for it.

This is unfortunately also only in German but it's a notice from an
organization similar to what a Department of Consumer Affairs would be
over here:
http://www.vzs.de/UNIQ114771527530681/link15436A.html

Looks like some people must have really bought those separators for a
whopping 949 Euros. Ouch!

There is a whole lot of pure quack out there and many folk don't have
the wits to see through it. That's what is exploited. Just the same as
with the Frankenfood-Detector mentioned in that link about.

Regards, Joerg

 

[Jon]

Is this for 3-phase DC?

 

[Robert Baer]

Thankyou all for such a good response. I'm now using a 0 ohm resistor to
ground with a 0 uF capacitor to the 0V rail and getting very good results.
Again, thanks for all the very informative assistance.

Fred Bear

Please be advised that due to the tolerance of 1 percent, that you
might have a *negative* zero ohm resistor!

 

[Roy L. Fuchs]

Please be advised that due to the tolerance of 1 percent, that you
might have a *negative* zero ohm resistor!

Please be advised that you know nothing about electronics OR math!

 

[Michael Wieser]

Hello Spehro,


It says "zumeist als Scherz", meaning "mostly as a joke". I remember
reading ads for that stuff in papers and stories about people who
actually fell for it.

This is unfortunately also only in German but it's a notice from an
organization similar to what a Department of Consumer Affairs would be
over here:
http://www.vzs.de/UNIQ114771527530681/link15436A.html

Looks like some people must have really bought those separators for a
whopping 949 Euros. Ouch!

There is a whole lot of pure quack out there and many folk don't have
the wits to see through it. That's what is exploited. Just the same as
with the Frankenfood-Detector mentioned in that link about.

Regards, Joerg

Jorg

and all others who think that this Atomstromseperator is some real
hardware:

http://www.nucleostop.de/impressum.html



best regards
-

Michael Wieser

--

 

[Keith]

Please be advised that you know nothing about electronics OR math!

Please be advised, DimBulb, that you have negative zero sense of
humor (and less intelligence).

 

[Joerg]

Hello Michael,

Jorg

and all others who think that this Atomstromseperator is some real
hardware:

http://www.nucleostop.de/impressum.html

Sure, but there have been quite a few attempts by other parties to milk
unsuspecting consumers for lots of cash:

http://archiv.chip.de/news/c1_archiv_news_stories_17514688.html
(sorry, only comes in German)

I guess it's more or less over now. Today, as gas prices are
skyrocketing sure enough there are the quacks again. This time all kinds
of super-duper-fuel-efficiency gizmos are being hawked.

Regards, Joerg

 

[Roy L. Fuchs]

Please be advised, DimBulb, that you have negative zero sense of
humor (and less intelligence).

As if a retarded **** like you could ever approach making a valid
assessment of someone else.

 

[Robert Baer]

Please be advised that you know nothing about electronics OR math!

Yimppin' yimminy, you eggzactly dew not git 'tiz a yolk, son.

 

[Rob*]

As if a retarded **** like you could ever approach making a valid
assessment of someone else.

Surely you meant fuch

 

[Bobo The Chimp]

Surely you meant fuch

I guess I'm not the only one who's noticed Roy Fuchs.

We should ask Mrs. Roy if he's any good at it. ;-P

 

[Jim Thompson]

[snip]

I guess I'm not the only one who's noticed Roy Fuchs.

We should ask Mrs. Roy if he's any good at it. ;-P

You are way behind the masses. We have all PLONKED his royal Fuchs.

...Jim Thompson

 

[Bobo The Chimp]

[snip]

I guess I'm not the only one who's noticed Roy Fuchs.

We should ask Mrs. Roy if he's any good at it. ;-P

You are way behind the masses. We have all PLONKED his royal Fuchs.

Well, at least ***THANK DOG***, I'm not ONE of them!!!!

Behind, Ahead, who cares? Maybe some chicken soup.....

Cheers!
Bobo