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RE: Questions 2 and 5 are related

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pictureguy

In Reply to: RE: Questions 2 and 5 are related posted by John Marks on February 27, 2022 at 07:57:51

You're more likely to create a 'nano diode' with copper....which when oxide IS a semiconductor....
Too much is never enough

Follow Ups:

RE: Questions 2 and 5 are related - roberttcan 11:49:29 03/04/22 (1)
Which is completely meaningless because that diode is in parallel with direct metal to metal connections. Do you know the band-gap voltage of copper oxide in a semiconducting state? Do you know you must be near/above this for anything to happen? oy vey
- RE: Questions 2 and 5 are related - pictureguy 12:27:13 03/04/22 (0)
  All I know is that copper diodes were made and used many years ago.
  We had a few samples in the 'company museum'. They also made Selenium rectifiers and by the time I left we were making a well regarded line of FREDs.....
  
  What happens IF copper oxide is between good copper and the 'other' connection....say in an interconnect?
  Copper oxide will form everywhere......it won't stop at the 'edge' but migrate under.....
  Silicon does the same thing, forming a 'birds beak' during early fabrication steps.....
  
  Agreed....IF in Parallel? But if not? Copper is not self passivating so will apparently keep 'growing'.
  
  Too much is never enough
Yes, but - geoffkait 13:37:28 03/01/22 (4)
I don't know how copper conductors are going to oxidize, one assumes the jackets containing them are air tight.
- RE: Yes, but - pictureguy 15:06:53 03/01/22 (3)
  The jackets are NOT 'vacuum sealed'...and DO admit air.
  
  And besides? The concern is at the ENDSs where they are exposed / crimped or under the odd wire nut in the J-Boxes in your house.....
  
  And yes, give it long enough and starting at the clipped ends, the conductors inside the jacket WILL oxidize.
  
  The real question is? Why WOULDN'T they?
  
  If I could add a drawing I don't want to make in the FIRST place? you'd see that a bundle of wires has spaces between the round conductors in which air travles the LENGTH of the cable.....
  Too much is never enough
  - RE: Yes, but - geoffkait 16:42:22 03/01/22 (2)
    I doubt any oxidation of copper - even if did occur - would change how wire directionality affects the sound. Plus I don't believe your characterization of copper that oxides acts like a diode. How bout them apples?
    - RE: Yes, but - pictureguy 16:59:34 03/01/22 (1)
      You know, I've learned over the years that even IF I don't believe something, it can still be true.
      
      Copperoxide was used as a stacked recitifier material.....In the age of similar stacked Selenium....
      
      I suspect such oxidezed connections MAY have an effect on the very lowest voltage circuits.....Maybe
      
      either MC or MM phono connections. But until YOU give the OK, that's just speculation.
      
      Any dissimilar metals 'joined' can have a thermoelectric voltage generated which can ALSO effect
      
      such very low voltage circuits.....
      Too much is never enough
      https://en.wikipedia.org/wiki/Metal_rectifier (Open in New Window)
      - RE: Yes, but - geoffkait 09:08:16 03/02/22 (0)
        
        In Reply to: RE: Yes, but posted by pictureguy on March 01, 2022 at 16:59:34
        
        I didn't see the word diode mentioned anywhere in that article, maybe I missed it. :-)

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