power cord break-in or burn-in is there such a thing?

[millwood]

How so?

Cheers,😉

why how so?

 

[fdegrove]

Hi,

Misreading again?

Science doesn't work for the power cord folks. "Mental pictures" do.

Science works fine for me and powercords, mental pictures help too but are hardly what I'd call scientific.

Catch 22 ?

Cheers,😉

 

[millwood]

Hi,

Misreading again?
Cheers,😉

how so?

 

[mrfeedback]

Inductance Is One Parameter....

Any of you ever tried putting one of those ferrite sleeves on your power cords ? - I have and I heard strong differences.
Changing a PC from one with relatively low inductance to one of relatively high inductance ought to produce similar effect.

Eric.

 

[millwood]

Re: Inductance Is One Parameter....

Changing a PC from one with relatively low inductance to one of relatively high inductance ought to produce similar effect.

Eric.

define "relatively low" and "relatively high" for us, please.

Otherwise, we may be talking about completely different things.

 

[mrfeedback]

With respect to each other.

Eric.

 

[millwood]

With respect to each other.

Eric.

Even an ex-President wouldn't have come up with such a great answer, 🙂

so you claim to be able to hear cords with 0.00000001mohm and cords with 0.00000000011mohm?

That is Godly hearing you got there.

 

[mrfeedback]

Get Your Terminology Correct, Sonny...........

In my theory books, inductance is expressed in Henries and not Ohms.
I am thinking that you have not read any such books, and much less tried the ferrite sleeves that I mentioned.

Eric.

 

[johnferrier]

Millwood, could your figures be way way off? If you say the numbers "0.00000001mohm and ... 0.00000000011mohm" are accurate, I can double check that for you.


JF

 

[millwood]

Re: Get Your Terminology Correct, Sonny...........

In my theory books, inductance is expressed in Henries and not Ohms.
I am thinking that you have not read any such books, and much less tried the ferrite sleeves that I mentioned.

Eric.

I was talking about "relative" effects: inductances relative to ohms.

So if you want, the same question can be posted in henries: can you hear a cord with 0.0000000000000000000000000000000000000000000001mh from one with 0.00000000000000000000000000000000000000000000000000000000000000000011mh, which is relatively low (vis-a-vis the first one)?

 

[Christer]

Re: Re: Get Your Terminology Correct, Sonny...........

I was talking about "relative" effects: inductances relative to ohms.

So if you want, the same question can be posted in henries: can you hear a cord with 0.0000000000000000000000000000000000000000000001mh from one with 0.00000000000000000000000000000000000000000000000000000000000000000011mh, which is relatively low (vis-a-vis the first one)?

Why didn't you use H instead of mH? That would have given
an even more impressive sequence of zeroes. 🙂 🙂

 

[johnferrier]

Millwood,

Trouble is I think that perhaps the numbers are closer to about 1uH with 0.5 ohm inductive reactance. This is for about a 6' piece of 12AWG wire at 60hz. I'll admit I'm guessing. If you state gauge size, wire length, and test frequency, it should be easy to get a ball park figure. Tomorrow, I'll have access to an RCL meter and can measure. I just think you've got way too many zeros.

Regardless, what's the point?


JF

 

[millwood]

Re: Re: Re: Get Your Terminology Correct, Sonny...........

Why didn't you use H instead of mH? That would have given
an even more impressive sequence of zeroes. 🙂 🙂

if you insist, 🙂.

It doesn't matter to me if it is H or mh or whatever, as long as Mr. Feedback can hear them, 🙂

Regardless, what's the point?
JF

trying to figure out how "relatively" accurate is Mr. Feedback's hearing is.

If you have real life examples between two power cords, it would be helpful to see at what frequencies the cable parameters can possibly come into play.

Looking forward to seeing your measurements.

 

[Christer]

Re: Re: Re: Re: Get Your Terminology Correct, Sonny...........

if you insist, 🙂.

It doesn't matter to me if it is H or mh or whatever, as long as Mr. Feedback can hear them, 🙂

I was joking, of course. Since the way you wrote the numbers
is not the best way to make them easily comprehensible, as
you very well know, I took for granted you used that notation
just to emphasize how small the numbers were.

 

[mrfeedback]

Al I Am Saying Is That Effects Due To PC Reactance Are Possible........

.....trying to figure out how "relatively" accurate is Mr. Feedback's hearing is.

If you have real life examples between two power cords, it would be helpful to see at what frequencies the cable parameters can possibly come into play.

Looking forward to seeing your measurements.

Amplifier power input circuits are not purely resistive - IOW reactive and/or non-linear.
By definition a reactive line feeding such a power input circuit stores energy and this stored energy can set up electrical resonances, and these resonances would be influenced by the electrical values of the PC.
Different spectrums of primary resonances could get through to the secondary differently, and also cause different transformer to ground/chassis leakage currents.
Both of these are noise sources that could effect sonics - simple as that.
Sure, debatable is the audibility of this noise and products, but it is entirely possible that they are audible according to the amplifier/circuit design.

Eric.

 

[EE_Mark]

Power Cord Resonances?

This thread just keeps getting dumber and dumber.

 

[mrfeedback]

So why then do snubbers cause sonic changes Mark ?.

Eric.

 

[millwood]

So why then do snubbers cause sonic changes Mark ?.

Eric.

for the same reason that neutrinos cause sonic change, Eric.

 

[fdegrove]

Hi,

So why then do snubbers cause sonic changes Mark ?.

It seems some people never heard about noise suppression, xformer tank resonance and snubber networks?

Maybe someone should draw an equivalent circuit for those folk?

Cheers, 😉

 

[jean-paul]

This thread just keeps getting dumber and dumber.

Quote of the year.