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  1. 18-01-2018 #11
    Desertboy's Avatar
    Lives in Leicester, United Kingdom.
    Desertboy
    Last Activity: 14-06-2025 Has been a member for 8-9 years. Has a total post count of 1,005. Received thanks 85 times, giving thanks to others 756 times.
    All modern VFDs use power devices known as IGBTs. These devices make it possible to minimize annoying audible noise by using switching frequencies beyond the audible range. Unfortunately, VFDs using IGBTs, present a high potential for generating RFI - Radio Frequency Interference.
    http://www.vfds.org/vfd-and-rfi-708163.html
    Last edited by Desertboy; 18-01-2018 at 09:24 PM.
    http://www.mycncuk.com/threads/10880...60cm-work-area My first CNC build WIP 120cm*80cm

    If you didn't buy it from China the company you bought it from did ;)
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