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Removing oxidation from valve pins

Discussion in 'audio' started by ducatiman, Jun 20, 2013.

  1. ducatiman

    ducatiman pfm Member

    Wondered what the General Consensus was, what do you use ?
    Should say I use a little IPA
     
  2. Steven Toy

    Steven Toy L3 Toy

    Cotton wool + meths or even screenwash.
     
  3. formbypc

    formbypc pfm Member

    Servisol Switch & Contact Cleaner?
     
  4. hifi-dog

    hifi-dog pfm Member

    i used my wifes nail emery boards....
     
  5. Kt77

    Kt77 pfm Member

    Even thou I'm in the states - I read about this one awhile back and ordered a can on eBay and found it actually works quite well.
     
  6. whatsnext

    whatsnext Naimless

    If serious doesn't it remove not just oxidisation but some original surface causing the rate of reoxidisation to increase?

    The right chemical removal agent makes most sense, inorganic rather than organic substance.
     
  7. hifi-dog

    hifi-dog pfm Member

    I based this on good old nos valves with brass or similar pins - not gold plated like the military spec cv types. Oh and small signal valves like ecc82/83 etc.
     
  8. Chops54

    Chops54 pfm Member

    When I was serving my time we used a lump of plasticine impregnated with pumice or some such stuff. Plugging the valve into this stuff a couple of times made the pins nice and shiny. However once the pins had their first cleaning they then needed doing on a more regular basis.
     
  9. Pete MB&D

    Pete MB&D Pete Maddex, the one and only!

    Put your finger on top of the valve when its in its socket and move it ouija style in a circle, them buy a transistor amp :D

    Pete
     
  10. Barrymagrec

    Barrymagrec pfm Member

    If you try this with an 807 you won`t need the transistor amp....
     
  11. Pete MB&D

    Pete MB&D Pete Maddex, the one and only!

    Pah

    I used to disconnect the rubber covered top cap on PY500As while the TV was still on.

    ;-)

    Pete
     
  12. Mark Grant

    Mark Grant Trade: Mark Grant Cables

  13. TheMooN

    TheMooN pfm Member

    Should the pins prove to be heavily oxidized an initial going over with 0000 fine wire wool , fibreglass pen , etc, etc .

    leave the valve sitting overnight in just enough Coke a Cola ( budget , branded , full-on or suger free it matters not) to cover the pins , wash off the pins with H2O (ideally de-ionized) .

    A light application of Caig DeoxIT to finish .
     
  14. Time Audio

    Time Audio Trade: Time Audio

    Coke - the real thing contains Phosphoric acid....probably what does the cleaning. However other brands are available :p

    Interesting question this as often NOS toobs are badly corroded etc.....some interesting solutions here though.....
     
  15. whatsnext

    whatsnext Naimless

    I am not a valve user so surmising only but if the valve pins are corroded what about the sockets they sit in?
     
  16. Barrymagrec

    Barrymagrec pfm Member

    Valid point, in my experience back in the days when valves were the norm, dodgy sockets gave more trouble than dirty valve pins - especially the brown phenolic Mcmurdo types.
     
  17. Arkless Electronics

    Arkless Electronics Trade: Amp design and repairs.

    They don't generally get oxidised or anything as such due to the type of metal they are made from. Sometimes a quick clean can be in order though....
     
  18. i_should_coco

    i_should_coco I am weasel

    Generally a fibreglass pencil does the trick.
     
  19. Time Audio

    Time Audio Trade: Time Audio

    Like ones for PCBs?
     
  20. Time Audio

    Time Audio Trade: Time Audio

    Think it depends on era and where manufactured.
     

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