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Power & Energy
Forum RF Noise - Do you notice the RF noise floor has greatly increased with the influx of wall warts?
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Forum Thread Details
  • Replies 24 replies
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RF Noise - Do you notice the RF noise floor has greatly increased with the influx of wall warts?

Cquk
Cquk 10 months ago

I would be interested to see if any one else has noticed the issue. Maybe if you work on RF devices / have a spectrum analyiser etc.

Even some bench PSU's seem to produce more EMI than i would expect. 

I am working on adding Ferrite's to all my cables but where does it stop?

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  • Cquk
    Cquk 10 months ago +2
    Hi All Update I have found a tool to Identify the source of the noise: https://www.sdr-kits.net/index.php?route=web/pages&page_id=113_113 I will report back once I build it.
  • DAB
    DAB 10 months ago +1
    They are built cheap, not as a quality power product.
  • dang74
    dang74 10 months ago +1
    I suspect that a noisy supply would manifest itself in the form of amplitude modulation which could raise the noise near any RF tones you're creating. It also wouldn't surprise me if you're seeing side…
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  • Richtech
    Richtech 10 months ago

    You may find that powerline network equipment from you or your neighbours has a large part to play. Those devices (and some are worse than others) put a comb of very wide band RF onto the mains which is detectable a long way from the source.

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  • electronicbiker
    electronicbiker 10 months ago in reply to Richtech

    So-called 'smart motorways' interfere with my sat-nav, and arcade games send my car radio into a frenzy when I drive past some pubs. 

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  • electronicbiker
    electronicbiker 10 months ago in reply to Richtech

    So-called 'smart motorways' interfere with my sat-nav, and arcade games send my car radio into a frenzy when I drive past some pubs. 

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