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Ways to make iron improve heat transfer?

Discussion in 'Electronic Basics' started by Bill Zimmerman, Nov 12, 2005.

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  1. I'm looking for ways to make a 25-Watt non temp control iron with the
    same temp rating as a 70-Watt hotter than that of the 70-Watt non temp
    control iron by manipulating the tip or by other means. What are some
    ways that you would do this?

    Thanks
     
  2. Thermally insulate as much of the heating element section of the iron
    as possible. I have done this on a couple of irons by wrapping
    fiberglass tape around the heater section and holding it in place with
    a couple loops of fine, bare wire. Most of the heat produced by many
    irons leaves the heater before getting to the tip. Expect the handle
    to get hotter, too.
     
  3. John Fields

    John Fields Guest

    ---
    For 120V mains: (View in Courier)


    MAINS>---+
    | +----------+ +---------+
    [VARIAC]<---|PRI SEC|--<<-----| |
    | |120V 240V| | |
    MAINS>---+--------|PRI SEC|--<<-----| |
    +----------+ +---------+
    ISOLATION SOLDERING
    TRANSFORMER RON
     
  4. If you want to make the tip hotter, you could try making it smaller.
     
  5. Pooh Bear

    Pooh Bear Guest

    The temp at the tip is simply a question of balance of heat flow in a
    non-thermostatic iron.

    The 25W iron will seem hotter with a larger tip that can transfer heat to
    the load ( the work ) better.

    I think you're chasing a fairly pointless idea though.

    Graham
     
  6. kell

    kell Guest

    Your post is a little confusing. It sounds like you want to make your
    25 watt
    iron hotter. What does the 70 watt iron have to do with it?
     
  7. Pooh Bear

    Pooh Bear Guest

    That increases the thermal resistance to the work and actually makes it
    colder. Sorry. I talk from experience.

    Graham
     
  8. Pooh Bear

    Pooh Bear Guest

    He seems to be using that as a reference.

    Graham
     
  9. Jasen Betts

    Jasen Betts Guest

    isulate it, pack it in rock wool (etc) and it'll get real hot.
    (this will reduce the life of the device...)

    even with that trick you won't get more thermal energy out of a 25W iron
    except in very short bursts (during which it'll cool down)

    another way is to run it at an over voltage, eg give a 115V iron 230V and
    it'll use 4 times as much power and heat like a 100W iron,
    and probably last about 10 minutes. it may not bea real safe doing that
    either.

    Bye.
    Jasen
     
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