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Homebrew Electronic Fluorescent Starter

Discussion in 'Electronic Basics' started by [email protected], Apr 15, 2007.

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  1. Guest

    Could a SIDAC be used instead of the standard mechanical glow bottle
    starter? I tried a K1200E sidac (120V breakover) with a 20W preheat
    ballast setup on 120VAC, but only the ends of the tube glowed (it
    "wants" to start though). Perhaps something needs the be added to the
    circuit or use a higher voltage SIDAC? I also tried two K1200E's in
    series to make a 240V SIDAC but that didn't do anything. TIA
  2. jasen

    jasen Guest

    no, they don't conduct for long enough.

    I tried a K1200E sidac (120V breakover) with a 20W preheat
  3. Jamie

    Jamie Guest

    you need the full sine wave for the reaction and also, i think you need
    more than 120 volts on most? I could be wrong there how ever.
    The idea is to heat the ends, while applying the voltage at the same
    time. The heaters should can be shut off once the tube is warm enough to
    keep it running with the HV>
    Then you have the CCFL type.,...
  4. default

    default Guest

    why would you think it would work?

    Should breakover and stay conducting in a standard glow tube starter
    replacement. It isn't "trying" to start it, it still needs to be
    disconnected from the circuit for the lamp to start.

    The glow starters use a bimetallic strip that heats up in the presence
    of current then open after a TIME DELAY (they don't sense current)
    there's a bit of argon gas in the starter to keep the bimetallic
    switch open if the lamp is lighted - if not, the cycle repeats.

    You'd have to duplicate that function to make a starter - dead short
    for a period of time, then open and stay open if current is flowing.

    Something like a normally closed (rare) solid state relay might be
    hacked to work - at a much higher cost than a lamp starter.
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