I notice a lot of "mental calculation" mixed with imagination plus specific claims.
What "someone" can see or hear is absolutely scientific proof.
Not exactly. For example, if several people witness an auto accident, they all tend to report having seen different things. And they all believe they know what they saw. No evidence anybody is lying.
The belief that our senses are accurate indicators of physical reality is incorrect, and is referred to as naive realism.
Specifically?? The audibility comment? Maybe just a convenient correlation?
Unfortunately, the copper oxide and how much you have is not a great insulator. More like a semi-conductor. Due to skin affect, the HF will be in that oxide material.
But going thru the oxide layer of a neglected connector is where the biggest problem occures for audio equipment. Gold on gold contact solves this oxidation 'problem'.
THx-RNMarsh
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I'll leave that one to JN. Both copper oxides are poor conductors BTW.
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Yes, they are not good conductors nor great insulators. But do make for a diode. Gold on gold is a practical solution for high-end systems.
As a side point.... fast Tr of pulsed power gives different results than continuous sine wave re.skin effect. That is, if you care about the true peak level.
-RNM
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yes, i know. i get this comment frequently .... dont bother to change the spelling.... I use, like other languages, the same spelling for different meanings... the correct meaning is known by the context it is used. Just my own laziness with a language which often has no rhyme nor reason.
Sometimes i use 'ain't' also.
-RNM
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And of course blanket statements are always wrong!
When my girlfriend is cold, she is *never* wrong.
Then one would find a dramatic worsening at higher levels and Ed's nV are the wrong place to look. I have also consulted with some hams, the copper oxide does not appreciably lower the Q of copper antenna tuning coils even at 10's of MHz
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I am talking about connections.... the contact to contact point. Hams use good RF connections/connectors (gold center pin, stainless steel body) and not RCA types. If they have a poor connection, or oxidized, they can and do generate unwanted harmonics ( an FCC no-no).
THx-RNMarsh
THx-RNMarsh
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I swear you mentioned skin effect. They also use 100's or even 1000's of volts and lots of amps.
This RCA Crap Connector story seems to be a never ending problem.
But Lemo Connectors were and are to expensive for audio, and XLRs are studio grade, thus not for audio.
Had hargold plated RCA s from WBT, veeeeeeeeeery expensive, missed the nickel barrier, they were black after a few years, soem ohms resistance ...
So i learned to avoid any connector when possible and every solder joint alone is better than RCAs with many solder joints.
Maybe todays production methods are better, but are RCAs are a potential problem source.
my 2 Cents
But Lemo Connectors were and are to expensive for audio, and XLRs are studio grade, thus not for audio
.Had hargold plated RCA s from WBT, veeeeeeeeeery expensive, missed the nickel barrier, they were black after a few years, soem ohms resistance ...
So i learned to avoid any connector when possible and every solder joint alone is better than RCAs with many solder joints.
Maybe todays production methods are better, but are RCAs are a potential problem source.
my 2 Cents
Skin effect is more an isuue with the wire itself. And the long runs which ham operators might have. Or studios or outdoor PA? Hams use quality connectors like the popular PL256. or maybe even type N with the rubber o-ring to seal out moisture. But the audio issue that might have the greatest effect would be oxidation thru contacts. A diode effect.
THx-RNMarsh
THx-RNMarsh
Skin effect in a round conductor only occurs as a result of the toroidal eddy currents generated within by the rate of change of the transport current.
For a conductor with a change in conductivity at the surface for some depth, the current will not be driven out into the higher conductivity surface. It will fight to remain out of the high resistance layer as a result of faraday. Only when the eddies are hard enough will current be driven into the outer layer. At audio frequencies and realistic wire sizes, there will be no driving into the oxide at the exclusion of the bulk, no filtering.
At rf, yah. But there, the surfaces are being polished as well.
Eddy current re-distribution of continuous sine is different from pulse because continuous has a history associated with it. A sine at zero crossing already has the magfield collapsing at the fastest rate so the eddies are the maximum. A pulse from zero has NO history, therefore no pre-distribution of energy.
John
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