Repeating spikes on 40m only at night.

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  • Updated 4 months ago
At night I get these spike signals running across the 40m band. I feel like I should know what's causing it, but, I just don't know. Any advice?  I'm assuming it's something in my house that only runs at night but, I don't' know what it could be. Almost everything in the house is shut off except my room at night.

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Richard Adkins

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Posted 4 months ago

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Jon - KF2E

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It looks like a switching power supply to me. Perhaps something that only gets turned on at night?
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Ken - NM9P, Elmer

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My wife’s laptop power supply does this, but only when she is running the computer on the ps.
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Stan - VA7NF

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Many switching supply options, especially landscape or in-home LED lighting and their ps.
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Richard Adkins

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I have numerous LED lights throughout the house. I can change the ones that are on at night when I'm on the radio and see if it helps.  Thanks!
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John - K3MA

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Try switching off the WNB.  If set too high it sometimes produces similar issues.
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Richard Adkins

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hmmm, never heard of that.  I'll try it.  I do have several LED lights that can be changed back to incandescent for as long as we can still get them. lol  But, I'll certainly try your idea.  Thanks.
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Pat KB6Y

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I have found that my neighbors solar system causes that on mine. They had a company working on it a few weeks ago. When they shut it down for maintenance the spikes immediately went away. You may look at that possibility.
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Jon - KF2E

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Seems unlikely that a solar system would be causing his problem at night.