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Amateur Radio Interference on HF - PLT or Switched Mode PSU or soemthing else?

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Uploaded by on Jun 8, 2010

Amateur Radio Interference on HF PLT or Switched Mode PSU or soemthing else? You decide....
Also effects SW

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  • Those pulsed 'raspberries' sound like a switchedmode PSU in standby. Any devices around the house left on standby using the remote control, rather than switched off?

    The constant raspberries sound like arcing from overhead HT power lines, Western Power have been quite good with replacing leaky insulators, it's in their own interests to do so. I don't know which distribution company you have, but you could give them a try.

    Fill in an Ofcom complaint.

  • Sounds like an over-modualated (square wave) producing these spikes in bands, repeated across the spectrum. I have heard much the same around 14 Mhz and elsewhere.

    If there's no QSB it'll ground wave from somewhere locally.

    The second one, on ten metres I haven't heard before.

    Somewhere there's a YouTube video showing what sound to expect. from PLT.

    73 G3NBY

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