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Thread: Oxidation and the importance of well terminated speaker cables...

  1. #21
    Join Date: Aug 2009

    Location: Staffordshire, England

    Posts: 37,778
    I'm Martin.

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    Quote Originally Posted by goraman View Post
    would be my first suspect. For copper to oxidize in just a few days his house must be like Vietnam in summer.
    .
    Oxidation problem will start to look trivial by next January when the Tet Offensive starts.
    Current Lash Up:

    TEAC VRDS 701T > Sony TAE1000ESD > Krell KSA50S > JM Labs Focal Electra 926.

  2. #22
    Join Date: May 2008

    Location: U.S.A. Neo-Socialist Kalifornski

    Posts: 3,262

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    I knew that Veitnam comment would not go unnoticed but the humidity point just had to be driven home in a meaningful way.
    If copper really is being corroded to the point contacts are broken down in just a few days, all I can think of is his body chemistry must be both salty and acidic touching the wire and the problem agsasserbated by extream humidity.
    I have seen this happen with guns, some people just can't touch blued fire arms with out causing them to rust right through the bluewing after a couple weeks.
    Others like me can leave finger prints and a year later nothing , no rust . It can just be him touching the copper conductor and humidity doing the rest. In that case deoxit will solve the problem.
    Last edited by goraman; 21-02-2019 at 19:23.
    Jeff :UBERTHREADKILLER

  3. #23
    Join Date: May 2008

    Location: U.S.A. Neo-Socialist Kalifornski

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    These budget Audion speaker wires where hooked up 8 years ago.
    At our store and remained untouched till today. The jacket to spite being run in a bright sunny window sill is a little yellowed but still soft and flexible with no degradation to the wire at all.
    If you look carefully the wire has little arrows and the printed side is positive the negative side is braided in reverse direction and is marked -------.
    All there cables are very low capacitance and has very low DC resistance. For not a large sum of money they are exceptional , this is their budget wire BTW.
    14 AWG. is 1.63 MM.

    This stuff spent 8 years being run 12 hours a day I unhooked the amp and speakers to put in my son Conner's room as we are changing our store a little and the stereo won't be needed .
    I was surprised after unhooking everything how good this wire still is ,look at the bare conductors! I am going to re use it in Conner's room. This stuff continues to impress me.
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    Last edited by goraman; 22-02-2019 at 06:29.
    Jeff :UBERTHREADKILLER

  4. #24
    Join Date: Jan 2013

    Location: Birmingham

    Posts: 6,772
    I'm James.

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    Quote Originally Posted by goraman View Post
    These budget Audion speaker wires where hooked up 8 years ago.
    At our store and remained untouched till today. The jacket to spite being run in a bright sunny window sill is a little yellowed but still soft and flexible with no degradation to the wire at all.
    If you look carefully the wire has little arrows and the printed side is positive the negative side is braided in reverse direction and is marked -------.
    All there cables are very low capacitance and has very low DC resistance. For not a large sum of money they are exceptional , this is their budget wire BTW.
    14 AWG. is 1.63 MM.

    This stuff spent 8 years being run 12 hours a day I unhooked the amp and speakers to put in my son Conner's room as we are changing our store a little and the stereo won't be needed .
    I was surprised after unhooking everything how good this wire still is ,look at the bare conductors! I am going to re use it in Conner's room. This stuff continues to impress me.
    It's not just your speaker external cables you need to consider but if you can take the drive units out easily then have a look how they are connected. To my horror I found both my tweeters and mid/bass units were connected to the crossover board with spade terminals at both speaker and board so 8 spade terminals that had all oxidised over 30 years! Removing the oxidation had a significant effect as it did cleaning my valve pins, fuses ........
    Main system : VPI Scout 1.1 / JMW 9T / 2M Black / Croft 25R+ / Croft 7 / Heco Celan GT 702

    Second System : Goldring Lenco GL75 / AT95EX / Pioneer SX590 / Spendor SP2

  5. #25
    Join Date: May 2008

    Location: U.S.A. Neo-Socialist Kalifornski

    Posts: 3,262

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    Quote Originally Posted by Jimbo View Post
    It's not just your speaker external cables you need to consider but if you can take the drive units out easily then have a look how they are connected. To my horror I found both my tweeters and mid/bass units were connected to the crossover board with spade terminals at both speaker and board so 8 spade terminals that had all oxidised over 30 years! Removing the oxidation had a significant effect as it did cleaning my valve pins, fuses ........
    All my internal connections are soldered so no problem, but this all started because the OP had problems with his speaker wire corroding servilely with in a couple days.
    Jeff :UBERTHREADKILLER

  6. #26
    Join Date: Sep 2013

    Location: North Island New Zealand

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    I'm Chris.

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    Quote Originally Posted by goraman View Post
    All my internal connections are soldered so no problem, but this all started because the OP had problems with his speaker wire corroding servilely with in a couple days.
    Would that include your preamp/attenuator internal volume control, and preamp/attenuator signal switching ?
    Making these contact-less is not hard.

  7. #27
    Join Date: May 2008

    Location: U.S.A. Neo-Socialist Kalifornski

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    Quote Originally Posted by Light Dependant Resistor View Post
    Would that include your preamp/attenuator internal volume control, and preamp/attenuator signal switching ?
    Making these contact-less is not hard.
    Deoxit, for cleaning controls pots ,but that is not what the OP needed help with.
    Jeff :UBERTHREADKILLER

  8. #28
    Join Date: Apr 2017

    Location: Bristol

    Posts: 339
    I'm Tony.

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    As a follow up to this thread, I discovered today that one of the spades on the jumper leads to the speakers had come loose and was causing the issue that I complained about.

    The jumper wire is quite close to the rear wall and when I was pulling my hair out trying to figure why the sound kept going off I did play with the positioning of the speakers and likley at times broke the connection and at other times pushed it together! This lead me to believe that the problem lay with the amp speaker connections when it was the other end!

    Anyway, I have now fitted a new spade to the jumper and the sound is lovely and crisp again!

    I knew something was wrong just didn't get to the right end of it!
    VPI Scout 1.1, Hana ML, Vanderveen MC10 SUT, WAD Phono3, Rpi3B+/Digione Signature, Xiang Sheng DAC-01, WAD KiT6550 and Reiver Edingdale SR

  9. #29
    Join Date: Dec 2015

    Location: Cardiff Wales

    Posts: 32
    I'm winston.

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    Quote Originally Posted by Haselsh1 View Post
    Always amuses the hell out of me when people refer to it as oxidisation

    I believe oxidisation is the correct term.

    Noun 1. oxidisation - the process of oxidizingoxidisation - the process of oxidizing; the addition of oxygen to a compound with a loss of electrons; always occurs accompanied by reduction

    oxidation, oxidization
    calcination - the conversion of metals into their oxides as a result of heating to a high temperature

    https://www.thefreedictionary.com/oxidisation

    If you polish a piece of copper and leave it for a day and then polish it again (or another piece) you will see the difference. Many metals react with oxygen in the air. That process speeds up with the application of heat hence the use of flux when stick welding or soldering to protect in the former and clean in the latter.

    I give my connections a re-seat about once a month.
    Last edited by winstonmalcolm; 05-03-2019 at 20:03.

  10. #30
    Join Date: Jan 2013

    Location: Birmingham

    Posts: 6,772
    I'm James.

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    Quote Originally Posted by Macca View Post
    Oxidation problem will start to look trivial by next January when the Tet Offensive starts.
    Tet Offensive?
    Main system : VPI Scout 1.1 / JMW 9T / 2M Black / Croft 25R+ / Croft 7 / Heco Celan GT 702

    Second System : Goldring Lenco GL75 / AT95EX / Pioneer SX590 / Spendor SP2

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