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  1. #4
    Forget rods, you will not get adequate conduction.
    Small stainless steel tube = medical needle.
    The steel is perfect for generating heat with a controlled current, enamelled (not lacquered-that's no good) copper wire through the middle and brazed at the bottom gives you a circuit with the greatest heat generation from the steel.
    The fan is to keep the connections, mounting block etc. at the top cool.
    Any good? :-)

    - Nick
    You think that's too expensive? You're not a Model Engineer are you? :D

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