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  1. #1
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    correct size of the LPF

    Hello i wish all the board a merry christmas

    i need some help regarding if someone have the correct PCB size or and original one .
    i need to me this lpf filter please need the correct size if possible
    thanks .
    elenos low pass filter

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    Re: correct size of the LPF

    Looks OK to me but:

    1. no mounting holes - if this is a single PCB, how do you hold it in place?
    2. no provision for making input and output connections.
    3. 54pF is not a standard capacitor value, if you intend making it from two 27pF capacitors in parallel, check there is sufficient space for them.

    Brian.
    PLEASE - no friends requests or private emails, I simply don't have time to reply to them all.
    It's better to share your questions and answers on Edaboard so we can all benefit from each others experiences.


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    Re: correct size of the LPF

    You should have appended the more interesting pictures

    Click image for larger version. 

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    In addition to betwixt's comments. If assembled on a single layer PCB, C150 "sees" a different ground than C149 and C151. The stop band attenuation will be not as good as the ideal transfer characteristic promises.


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  4. #4
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    Re: correct size of the LPF

    and what about the pcb size in mm ? that is my question indeed, thanks.



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    Re: correct size of the LPF

    As small as possible, large enough to fit coils with given dimension.


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  6. #6
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    Re: correct size of the LPF

    i cannot imagine how much in mm ,i will try .to make the coil first ,look i will only have to put about 50watts only because i dont have atc ,and just for filtering with aid of a vna later



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