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Type: Posts; User: Zak28

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    Closed: Re: carbon arc modalities

    What was meant by the claim constant current isn't ideal to sustain arcs is with linear constant current sources.

    I was simply going to employ fullwave rectified capacitor dropper with a lot of...
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    Closed: Re: carbon arc modalities

    Whats the switching constant current topology which ideally suits the arc?
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    Closed: Re: carbon arc modalities

    How efficient are constant current sources powering the arcs?
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    Closed: Re: carbon arc modalities

    Those impulses would be suppressed if the filter capacitor is large enough to supply most of the peak current.
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    Closed: Re: carbon arc modalities

    A capacitor dropper series to the arc is better than a large ballast. Can be full wave rectified and filtered.

    But what high voltage constant current topology is most efficient?
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    Closed: Re: carbon arc modalities

    Those 3kW 50A supplies are uncommon perhaps you have images of it in action with carbon electrodes?

    Its been well established the method to make arcs is contacting then separating the electrodes.
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    Closed: Re: How to control a electric magnet

    There aren't any specifications provided other than a function generator and an electromagnet.
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    Closed: Re: carbon arc modalities

    Are there off the shelf constant DC current drivers which can power the arc without its protection features blocking the arc from operating?

    Any decent LED driver which has protection features...
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    Closed: Re: How to control a electric magnet

    Electromagnets will have far more inductive reactance to the whole audio frequency bands especially that which can pull 134 pounds.

    The function generator should be isolated from the circuit such...
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    Closed: Re: How to control a electric magnet

    An amplifier with AC output will be very nonlinear in its frequency band since its energy storage and usage is effected by electromagnets inductance. The speakers you mentioned is nothing akin to the...
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    Closed: Re: carbon arc modalities

    Is the nitric acid byproduct a major contributor to electrode wear?
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    Closed: Re: Cellular Power Densities

    They can reduce infrastructure if the frequency was further reduced. A few hundred Mhz should be enough to transmit great distance without the need to saturate the cities with cell towers - which 5G...
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    Closed: Re: How to control a electric magnet

    The issue with class D or any AC output amplifier is their wasted power which would be reflected and not be consumed by the electromagnet perdue its enormous inductance.

    This seems to be a task...
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    Closed: EMI Absorption and Reflection

    Ordinary reflectors are nothing more than conductive media which have minimal losses and near ideal reflection. Wereas an absorber is characterized by its power loss.

    However to interact with an E...
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    Closed: Re: bjt safe operating area diagram

    Do the vendors copy each others datasheets?
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    Closed: bjt safe operating area diagram

    Is this a typo, if not what is the purpose for specifying 0.1Amps on the vertical scale multiple times?

    Both datasheets for identical parts but from different vendors depict identical things.
    ...
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    Closed: Re: carbon arc modalities

    Ballasting with AC can be done with a series film capacitor to electrodes, it would have to be rather large value to permit the low frequency but its lighter and more compact than inductors.

    Do...
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    Closed: Re: Cellular Power Densities

    Should't the emphasis of mobile phones be maximum reliability with minimum infrastructure?

    The bands 5g works with has nearly always been employed for point to point communications or used for...
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    Closed: Re: carbon arc modalities

    Does this mean a carbon arc can be wider with a 5v 200w supply instead of the 200v 1amp?
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    [SOLVED]Closed: Re: mosfet totem pole voltage

    The PMOS can be logic level which would turn on at 5Vgs, also the pot was just for a reference.
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    Closed: Re: carbon arc modalities

    The negative I/V characteristic means voltage increases as current decreases?
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    Closed: Re: carbon arc modalities

    Howcome the 200v 1A method would only yield a 1-2mm arc?

    Carbon electrodes put out copious UV and heat which readily ionizes gasses.

    The CC method is inefficient since its speced with a CC...
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    [SOLVED]Closed: Re: mosfet totem pole voltage

    That is a hazard which can be removed with a series resistor to the pot or using a voltage divider instead of the pot.

    But the question was whether the PMOS is completely absent of any high...
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    Closed: Re: carbon arc modalities

    The arcs are started by separating them slowly heating and ionizing the area in between. Should be fine if done slower to prevent gap from being prematurely quenched. But the CC source might prevent...
  25. [SOLVED]Closed: Re: Stacking diodes for high voltage rectification

    Those have capacitances lower than point contact diodes. They should work - are you aware of any retailers stocking their products?
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