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silicone adhesive as electrical insulation?

Discussion in 'Electronic Repair' started by [email protected], Oct 10, 2006.

  1. My old Mity at one point had too short wires, so I lengthened them simply
    by soldering onto the terminals of the bar mount, and then I stuck
    silicone sealant in there. Worked perfectly for a long time. The silicone
    eventually started to come loose from the bar mount as a little block,
    though, rather than staying put.

    Jasper
     
  2. Is it the same stuff they use to pot flyback secondaries? That's
    12,000
    to 40,000 volts hf.
     
  3. James Sweet

    James Sweet Guest


    Flybacks are potted in epoxy resin.
     
  4. Road Man

    Road Man Guest


    Speaking of HV, I can't imagine the voltages in the Cateye causing any
    significant electrical stress, and hence any voltage induced failures
    even without Goop or some sealant, as long as everything started clean
    and stayed clean. I could imagine an additional mechanical problem
    having lead to another open circuit due to the three miles of road
    vibration. In some such repairs I've tried, I've not been able to
    re-solder broken leads/pins with low enough energy to prevent
    additional damage. Two reasons for this: too cheap to buy the proper
    very-low power soldering system, and not proper skills for such
    delicate work. And this after having been certified to solder
    according to NASA standards! But nothing in spacecraft back in those
    days was as tiny as modern commercial electronics.

    Datakoll, I think something else in your Cateye has broken, and it
    might or might not be associated with your repair, based on what
    you've told us.

    Ken
     
  5. Road Man

    Road Man Guest

    This sounds like a joke from Rowan and Martin's Laugh-in.
     
  6. Guest

    Dear Ken,

    By one of those odd coincidences, Dan Rowan was probably the most
    famous kid to come out of the McClelland orphanage down the street
    from where I live.

    Rowan was the one with the moustache and a fistful of medals as a
    fighter pilot.

    Cheers,

    Carl Fogel
     
  7. My Cateye reads in furlongs if I set it to a calibration number of
    1069.

    Alas, it still reads in decimals, not eights. More work is required.
     
  8. Why don't spark plug leads get made out of metal, copper or whatever?

    Jasper
     
  9. GregS

    GregS Guest

    They used to be. Might even be able to get racing wires. They generate a
    lot of RF interference. Using resistor plugs helped a bit in this case.

    greg

    greg
     
  10. Meat Plow

    Meat Plow Guest

    They make lots of RFI.
     
  11. And they don't when they're made out of resistor wire? Huh. Weird.

    Jasper
     
  12. Baron

    Baron Guest

    No, not as much. The resistance built into the length of the lead
    chokes of the high frequencies that cause most of the interference !
     

  13. Its not wire. Its conductive carbon fibers.


    --
    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
     
  14. It's still wire. It's long and it conducts electricity, that's close
    enoough for government work. Who cares if it's not technically made out of
    metals.

    Jasper
     
  15. Jim Land

    Jim Land Guest

    Sorry, the Compact Oxford English Dictionary disagrees:

    wire

    • noun metal drawn out into a thin flexible thread or rod
     
  16. Yes, I looked it up, that's why I formulated my post the way I did. So
    don't be redundant.

    Jasper
     
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